diff options
Diffstat (limited to 'smartctl.8.in')
| -rw-r--r-- | smartctl.8.in | 2621 |
1 files changed, 2621 insertions, 0 deletions
diff --git a/smartctl.8.in b/smartctl.8.in new file mode 100644 index 0000000..7e1abf2 --- /dev/null +++ b/smartctl.8.in @@ -0,0 +1,2621 @@ +.ig +Copyright (C) 2002-10 Bruce Allen +Copyright (C) 2004-23 Christian Franke + +SPDX-License-Identifier: GPL-2.0-or-later + +$Id: smartctl.8.in 5521 2023-07-24 16:44:49Z chrfranke $ + +.. +.\" Macros borrowed from pages generated with Pod::Man +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp 0.4v +.if n .sp +.. +.de Vb \" Begin verbatim text +.if t .ft CW +.if n .ft R +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Use groff extension \(aq (apostrophe quote, ASCII 0x27) if possible +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.TH SMARTCTL 8 "CURRENT_SVN_DATE" "CURRENT_SVN_VERSION" "SMART Monitoring Tools" +.SH NAME +\fBsmartctl\fP \- Control and Monitor Utility for SMART Disks +.Sp +.SH SYNOPSIS +.B smartctl [options] device +.Sp +.SH DESCRIPTION +.\" %IF NOT OS ALL +.\"! [This man page is generated for the OS_MAN_FILTER version of smartmontools. +.\"! It does not contain info specific to other platforms.] +.\"! .PP +.\" %ENDIF NOT OS ALL +\fBsmartctl\fP controls the Self-Monitoring, Analysis and +Reporting Technology (SMART) system built into most ATA/SATA and SCSI/SAS +hard drives and solid-state drives. +The purpose of SMART is to monitor the reliability of the hard drive +and predict drive failures, and to carry out different types of drive +self-tests. +\fBsmartctl\fP also supports some features not related to SMART. +This version of \fBsmartctl\fP is compatible with +ACS-3, ACS-2, ATA8-ACS, ATA/ATAPI-7 and earlier standards +(see \fBREFERENCES\fP below). +.PP +\fBsmartctl\fP also provides support for SCSI tape drives and +changers (see \fBTAPE DRIVES\fP below). +.PP +The user must specify the device to be controlled or interrogated as +the final argument to \fBsmartctl\fP. The command set used by the device +is often derived from the device path but may need help with the \*(Aq\-d\*(Aq +option (for more information see the section on "ATA, SCSI command sets +and SAT" below). +Device paths are as follows: +.\" %IF OS Linux +.IP \fBLINUX\fP: 9 +Use the forms \fB"/dev/sd[a\-z]"\fP for ATA/SATA and SCSI/SAS devices. +For SCSI Tape Drives and Changers use the +devices \fB"/dev/nst*"\fP and \fB"/dev/sg*"\fP. For disks behind +3ware controllers you may need \fB"/dev/sd[a\-z]"\fP or +\fB"/dev/twe[0\-9]"\fP, \fB"/dev/twa[0\-9]"\fP or \fB"/dev/twl[0\-9]"\fP: +see details below. +For disks behind HighPoint RocketRAID controllers you may need +\fB"/dev/sd[a\-z]"\fP. For disks behind Areca SATA RAID controllers, +you need \fB"/dev/sg[2\-9]"\fP (note that smartmontools interacts with +the Areca controllers via a SCSI generic device which is different +than the SCSI device used for reading and writing data)! For HP Smart +Array RAID controllers, there are three currently supported drivers: cciss, +hpsa, and hpahcisr. For disks accessed via the cciss driver the device nodes +are of the form \fB"/dev/cciss/c[0\-9]d0"\fP. For disks accessed via +the hpahcisr and hpsa drivers, the device nodes you need are +\fB"/dev/sg[0\-9]*"\fP. +("lsscsi \-g" is helpful in determining which scsi generic device node +corresponds to which device.) +Use the nodes corresponding to the RAID controllers, not the nodes +corresponding to logical drives. +See the \fB\-d\fP option below, as well. +Use the forms \fB"/dev/nvme[0\-9]"\fP (broadcast namespace) or +\fB"/dev/nvme[0\-9]n[1\-9]"\fP (specific namespace 1\-9) for NVMe devices. +.\" %ENDIF OS Linux +.\" %IF OS Darwin +.IP \fBDARWIN\fP: 9 +Use the forms \fB/dev/disk[0\-9]\fP or equivalently \fBdisk[0\-9]\fP or +equivalently \fB/dev/rdisk[0\-9]\fP. +Long forms are also available: please use \*(Aq\-h\*(Aq to see some examples. +.Sp +There is NVMe support based on the NVMeSMARTLib API in OSX. +.Sp +Note that Darwin SCSI support is not yet implemented. +.Sp +Use the OS X SAT SMART Driver to access SMART data on SAT capable USB and +Firewire devices (see INSTALL file). +.\" %ENDIF OS Darwin +.\" %IF OS FreeBSD +.IP \fBFREEBSD\fP: 9 +Use the forms \fB"/dev/ad[0\-9]+"\fP for IDE/ATA +devices and \fB"/dev/da[0\-9]+"\fP or \fB"/dev/pass[0\-9]+"\fP for SCSI devices. +For SATA devices on AHCI bus use \fB"/dev/ada[0\-9]+"\fP format. For HP Smart +Array RAID controllers, use \fB"/dev/ciss[0\-9]"\fP (and see the \fB\-d\fP +option, below). +.\" %ENDIF OS FreeBSD +.\" %IF OS NetBSD OpenBSD +.IP \fBNETBSD/OPENBSD\fP: 9 +Use the form \fB"/dev/wd[0\-9]+c"\fP for IDE/ATA +devices. For SCSI disk and tape devices, use the device names +\fB"/dev/sd[0\-9]+c"\fP and \fB"/dev/st[0\-9]+c"\fP respectively. +Be sure to specify the correct "whole disk" partition letter for +your architecture. +.\" %ENDIF OS NetBSD OpenBSD +.\" %IF OS Solaris +.IP \fBSOLARIS\fP: 9 +Use the forms \fB"/dev/rdsk/c?t?d?s?"\fP for IDE/ATA and SCSI disk +devices, and \fB"/dev/rmt/*"\fP for SCSI tape devices. +.\" %ENDIF OS Solaris +.\" %IF OS Windows Cygwin +.IP \fBWINDOWS\fP: 9 +Use the forms \fB"/dev/sd[a\-z]"\fP for IDE/(S)ATA and SCSI disks +"\\\\.\\PhysicalDrive[0\-25]" (where "a" maps to "0"). +Use \fB"/dev/sd[a\-z][a\-z]"\fP for "\\\\.\\PhysicalDrive[26\-...]". +These disks can also be referred to as \fB"/dev/pd[0\-255]"\fP for +"\\\\.\\PhysicalDrive[0\-255]". +ATA disks can also be referred to as \fB"/dev/hd[a\-z]"\fP for +"\\\\.\\PhysicalDrive[0\-25]". +Use one the forms \fB"/dev/tape[0\-255]"\fP, \fB"/dev/st[0\-255]"\fP, +or \fB"/dev/nst[0\-255]"\fP for SCSI tape drives "\\\\.\\Tape[0\-255]". +.Sp +Alternatively, drive letters \fB"X:"\fP or \fB"X:\\"\fP may be used to +specify the (\*(Aqbasic\*(Aq) disk behind a mounted partition. This does +not work with \*(Aqdynamic\*(Aq disks. +.Sp +For disks behind 3ware 9000 controllers use \fB"/dev/sd[a\-z],N"\fP where +N specifies the disk number (3ware \*(Aqport\*(Aq) behind the controller +providing the logical drive (\*(Aqunit\*(Aq) specified by +\fB"/dev/sd[a\-z]"\fP. +Alternatively, use \fB"/dev/tw_cli/cx/py"\fP for controller x, port y +to run the \*(Aqtw_cli\*(Aq tool and parse the output. This provides limited +monitoring (\*(Aq\-i\*(Aq, \*(Aq\-c\*(Aq, \*(Aq\-A\*(Aq below) if SMART +support is missing in the driver. +Use \fB"/dev/tw_cli/stdin"\fP or \fB"/dev/tw_cli/clip"\fP +to parse CLI or 3DM output from standard input or clipboard. +The option \*(Aq\-d 3ware,N\*(Aq is not necessary on Windows. +.Sp +For disks behind Intel controller with RST driver or an AMD controller +with AMD RAID driver, use \fB"/dev/csmi[0\-9],N"\fP where N specifies the +port behind the logical scsi controller "\\\\.\\Scsi[0\-9]:". +.br +The AMD RAID driver may return incomplete information about port assignment. +To allow access to ports not reported, device scan returns all ports. +Device open fails then if the port is unused. +.Sp +By default, the AMD RAID driver only allows CSMI read accesses. +To enable write access, change the registry value +.br +\fB[HKLM\\SYSTEM\\CurrentControlSet\\Services\\rcraid\\Parameters\\Device]\fP +.br +\fB"DriverParameter"="CSMI=Limited;"\fP +.br +to +.br +\fB"DriverParameter"="CSMI=Full;"\fP +.br +and reboot. +.Sp +For SATA or SAS disks behind an Areca controller use +\fB"/dev/arcmsr[0\-9]"\fP, see \*(Aq\-d areca,N[/E]\*(Aq below. +.Sp +Use the forms \fB"/dev/nvme[0\-9]"\fP (broadcast namespace) or +\fB"/dev/nvme[0\-9]n[1\-9]"\fP (specific namespace 1\-9) for first, +second, ..., NVMe device. +Alternatively use the forms \fB"/dev/nvmes[0\-9][n[1\-9]]"\fP for NVMe devices +behind the logical scsi controller "\\\\.\\Scsi[0\-9]:". +Both forms require a NVMe driver which supports NVME_PASS_THROUGH_IOCTL. +.Sp +Use the forms \fB"/dev/sd[...]"\fP or \fB"/dev/pd[...]"\fP (see above) +for NVMe devices behind Windows 10 NVMe driver (stornvme.sys). +The pass-through functionality of this driver does not require admin rights +to retrieve device information (\*(Aq\-x\*(Aq option). +Admin rights are required if the device state is changed +(\*(Aq\-t TEST\*(Aq option). +.Sp +The prefix \fB"/dev/"\fP is optional. +.\" %ENDIF OS Windows Cygwin +.\" %IF OS OS2 +.IP \fBOS/2,eComStation\fP: 9 +Use the form \fB"/dev/hd[a\-z]"\fP for ATA/SATA devices using DANIS506 driver. +.Sp +Use the form \fB"/dev/ahci[a\-z]"\fP for ATA/SATA devices using OS2AHCI driver. +.\" %ENDIF OS OS2 +.PP +if \*(Aq\-\*(Aq is specified as the device path, \fBsmartctl\fP reads and +interprets it's own debug output from standard input. +See \*(Aq\-r ataioctl\*(Aq below for details. +.PP +\fBsmartctl\fP guesses the device type if possible. +If necessary, the \*(Aq\-d\*(Aq option can be used to override this guess. +.PP +Note that the printed output of \fBsmartctl\fP displays most numerical +values in base 10 (decimal), but some values are displayed in base 16 +(hexadecimal). To distinguish them, the base 16 values are always +displayed with a leading \fB"0x"\fP, for example: "0xff". +This man page follows the same convention. +.Sp +.SH OPTIONS +The options are grouped below into several categories. \fBsmartctl\fP +will execute the corresponding commands in the order: INFORMATION, +ENABLE/DISABLE, DISPLAY DATA, RUN/ABORT TESTS. +.Sp +.TP +.B SHOW INFORMATION OPTIONS: +.TP +.B \-h, \-\-help, \-\-usage +Prints a usage message to STDOUT and exits. +.TP +.B \-V, \-\-version, \-\-copyright, \-\-license +Prints version, copyright, license, home page and SVN revision +information for your copy of \fBsmartctl\fP to STDOUT and then exits. +.TP +.B \-i, \-\-info +Prints the device model number, serial number, firmware version, and +ATA Standard version/revision information. Says if the device +supports SMART, and if so, whether SMART support is currently enabled +or disabled. If the device supports Logical Block Address mode (LBA +mode) print current user drive capacity in bytes. (If drive has a +user protected area reserved, or is "clipped", this may be smaller +than the potential maximum drive capacity.) Indicates if the drive is +in the smartmontools database (see \*(Aq\-v\*(Aq options below). If so, the +drive model family may also be printed. +If \*(Aq\-n\*(Aq (see below) is specified, the power mode of the drive is +printed. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +[NVMe] For NVMe devices the information is obtained from the Identify +Controller and the Identify Namespace data structure. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-\-identify[=[w][nvb]] +[ATA only] Prints an annotated table of the IDENTIFY DEVICE data. +By default, only valid words (words not equal to 0x0000 or 0xffff) +and nonzero bits and bit fields are printed. +This can be changed by the optional argument which consists of one or +two characters from the set \*(Aqwnvb\*(Aq. +The character \*(Aqw\*(Aq enables printing of all 256 words. The character +\*(Aqn\*(Aq suppresses printing of bits, \*(Aqv\*(Aq enables printing of all +bits from valid words, \*(Aqb\*(Aq enables printing of all bits. +For example \*(Aq\-\-identify=n\*(Aq (valid words, no bits) produces the +shortest output and \*(Aq\-\-identify=wb\*(Aq (all words, all bits) produces +the longest output. +.TP +.B \-a, \-\-all +Prints all SMART information about the device. +.Sp +For ATA, this is equivalent to +.br +\*(Aq\-H \-i \-c \-A \-l error \-l selftest \-l selective\*(Aq. +.br +This option is no longer recommended for ATA disks because it does not enable +the SMART options which require support for 48-bit ATA commands +(see \*(Aq-x\*(Aq below). +.Sp +For SCSI, this is equivalent to +.br +\*(Aq\-H \-i \-A \-l error \-l selftest\*(Aq. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +For NVMe, this is equivalent to +.br +\*(Aq\-H \-i \-c \-A \-l error \-l selftest\*(Aq. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-x, \-\-xall +Prints all SMART and non-SMART information about the device. +.Sp +For ATA, this is equivalent to +.br +\*(Aq\-H \-i \-g all \-g wcreorder \-c \-A \-f brief \-l xerror,error +\-l xselftest,selftest \-l selective \-l directory \-l scttemp \-l scterc +\-l devstat \-l defects \-l sataphy\*(Aq. +.br +If \*(Aq\-a\*(Aq is also specified, add \*(Aq\-l error \-l selftest\*(Aq. +.Sp +For SCSI disks, this is equivalent to +.br +\*(Aq\-H \-i \-g all \-A \-l error \-l selftest \-l background \-l sasphy +\-l defects \-l envrep \-l genstats \-l ssd \-l zdevstat\*(Aq +.br +and for SCSI tape drives and changers, add \*(Aq\-l tapedevstat\*(Aq. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +For NVMe, this is equivalent to +.br +\*(Aq\-H \-i \-c \-A \-l error \-l selftest\*(Aq. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-\-scan +Scans for devices and prints each device name, device type and protocol +([ATA] or [SCSI]) info. May be used in conjunction with \*(Aq\-d TYPE\*(Aq +to restrict the scan to a specific TYPE. See also info about platform +specific device scan and the \fBDEVICESCAN\fP directive on +\fBsmartd\fP(8) man page. +.TP +.B \-\-scan\-open +Same as \-\-scan, but also tries to open each device before printing +device info. The device open may change the device type due +to autodetection (see also \*(Aq\-d test\*(Aq). +.Sp +This option can be used to create a draft \fBsmartd.conf\fP file. +All options after \*(Aq\-\-\*(Aq are appended to each output line. +For example: +.Vb 1 +smartctl \-\-scan\-open \-\- \-a \-W 4,45,50 \-m admin@work > smartd.conf +.Ve +.Sp +Multiple \*(Aq\-d TYPE\*(Aq options may be specified with +\*(Aq\-\-scan[\-open]\*(Aq to combine the scan results of more than one TYPE. +.TP +.B \-g NAME, \-\-get=NAME +Get non-SMART device settings. See \*(Aq\-s, \-\-set\*(Aq below for further +info. +.Sp +.TP +.B RUN-TIME BEHAVIOR OPTIONS: +.TP +.B \-j, \-\-json[=cgiosuvy] +Enables JSON or YAML output mode. +.Sp +The output could be modified or enhanced by the optional argument which +consists of one or more characters from the set \*(Aqcgiosuvy\*(Aq: +.br +\*(Aqc\*(Aq: Outputs \fBc\fPompact format without extra spaces and newlines. +By default, output is pretty-printed. +If used with YAML format, the indentation of arrays is reduced. +.br +\*(Aqg\*(Aq: Outputs JSON structure as single assignments to allow the usage +of \fBg\fPrep. +Each assignment reflects the absolute path of a value. +The syntax is compatible with \fBgron\fP: +.br +\*(Aqjson.KEY1[INDEX2].KEY3 = VALUE;\*(Aq. +.br +\*(Aqo\*(Aq: Includes the full \fBo\fPriginal plaintext \fBo\fPutput of +\fBsmartctl\fP as a JSON array \*(Aqsmartctl.output[]\*(Aq. +.br +\*(Aqs\*(Aq: Outputs JSON object elements \fBs\fPorted by key. +By default, object elements are ordered as generated internally. +.br +\*(Aqv\*(Aq: Enables \fBv\fPerbose output of possible unsafe integers. +If specified, values which may exceed JSON safe integer (53-bit) range are +always output as a number (with some \*(AqKEY\*(Aq) and a string +(\*(AqKEY_s\*(Aq), regardless of the actual value. +Values which may exceed 64-bit range are also output as a little endian +byte array (\*(AqKEY_le\*(Aq). +By default, the additional elements are only output if the value actually +exceeds the range. +.br +\*(Aqy\*(Aq: Outputs in YAML format. +.Sp +The following two arguments are primarily intended for development: +.br +\*(Aqi\*(Aq: Includes lines from the plaintext output which print info already +\fBi\fPmplemented for JSON output. +The lines appear as strings with key \*(Aqsmartctl_NNNN_i\*(Aq. +.br +\*(Aqu\*(Aq: Includes lines from the plaintext output which print info still +\fBu\fPnimplemented for JSON output. +The lines appear as strings with key \*(Aqsmartctl_NNNN_u\*(Aq. +.TP +.B \-q TYPE, \-\-quietmode=TYPE +Specifies that \fBsmartctl\fP should run in one of the quiet modes +described here. The valid arguments to this option are: +.Sp +.I errorsonly +\- only print: For the \*(Aq\-l error\*(Aq option, if nonzero, the number +of errors recorded in the SMART error log and the power-on time when +they occurred; For the \*(Aq\-l selftest\*(Aq option, errors recorded in +the device self-test log; For the \*(Aq\-H\*(Aq option, SMART "disk failing" +status or device Attributes (pre-failure or usage) which failed either now +or in the past; For the \*(Aq\-A\*(Aq option, device Attributes (pre-failure +or usage) which failed either now or in the past. +.Sp +.I silent +\- print no output. The only way to learn about what was found is to +use the exit status of \fBsmartctl\fP (see EXIT STATUS below). +.Sp +.I noserial +\- Do not print the serial number of the device. +This also suppresses the LU WWN Device Id (ATA) and the SAS addresses (SCSI). +The related fields are also invalidated in the ATA and NVMe debug outputs. +.br +Note: This is not the case in SCSI debug output. +.br +[NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +The Namespace IEEE EUI-64 (NVMe) is also suppressed. +.TP +.B \-d TYPE, \-\-device=TYPE +Specifies the type of the device. +The valid arguments to this option are: +.Sp +.I auto +\- attempt to guess the device type from the device name or from +controller type info provided by the operating system or from +a matching USB ID entry in the drive database. +This is the default. +.Sp +.I test +\- prints the guessed TYPE, then opens the device and prints the +(possibly changed) TYPE name and then exits without performing +any further commands. +.Sp +.I ata +\- the device type is ATA. This prevents +\fBsmartctl\fP +from issuing SCSI commands to an ATA device. +.Sp +.\" %IF NOT OS Darwin +.I scsi +\- the device type is SCSI. This prevents +\fBsmartctl\fP +from issuing ATA commands to a SCSI device. +.Sp +.\" %ENDIF NOT OS Darwin +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I nvme[,NSID] +\- the device type is NVM Express (NVMe). +The optional parameter NSID specifies the namespace id (in hex) passed +to the driver. +Use 0xffffffff for the broadcast namespace id. +The default for NSID is the namespace id addressed by the device name. +.Sp +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.\" %IF NOT OS Darwin +.I sat[,auto][,N] +\- the device type is SCSI to ATA Translation (SAT). +This is for ATA disks that have a SCSI to ATA Translation Layer (SATL) +between the disk and the operating system. +SAT defines two ATA PASS THROUGH SCSI commands, one 12 bytes long and +the other 16 bytes long. The default is the 16 byte variant which can be +overridden with either \*(Aq\-d sat,12\*(Aq or \*(Aq\-d sat,16\*(Aq. +.Sp +If \*(Aq\-d sat,auto\*(Aq is specified, device type SAT (for ATA/SATA disks) +is only used if the SCSI INQUIRY data reports a SATL (VENDOR: "ATA "). +Otherwise device type SCSI (for SCSI/SAS disks) is used. +.Sp +.I usbasm1352r,PORT +\- [NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +this device type is for one or two SATA disks that are behind an ASMedia +ASM1352R USB to SATA (RAID) bridge. +The parameter PORT (0 or 1) selects the disk to monitor. +.br +Note: This USB bridge also supports \*(Aq\-d sat\*(Aq. +This monitors either the first disk or the second disk if no disk is +connected to the first port. +.Sp +.I usbcypress +\- this device type is for ATA disks that are behind a Cypress USB to PATA +bridge. This will use the ATACB proprietary scsi pass through command. +The default SCSI operation code is 0x24, but although it can be overridden +with \*(Aq\-d usbcypress,0xN\*(Aq, where N is the scsi operation code, +you're running the risk of damage to the device or filesystems on it. +.Sp +.I usbjmicron[,p][,x][,PORT] +\- this device type is for SATA disks that are behind a JMicron USB to +PATA/SATA bridge. +The 48-bit ATA commands (required e.g.\& for \*(Aq\-l xerror\*(Aq, see below) +do not work with all of these bridges and are therefore disabled by default. +These commands can be enabled by \*(Aq\-d usbjmicron,x\*(Aq. +If two disks are connected to a bridge with two ports, an error message is +printed if no PORT (0 or 1) is specified. +.br +The PORT parameter is not necessary if the device uses a port multiplier to +connect multiple disks to one port. +The disks appear under separate /dev/ice names then. +.br +CAUTION: Specifying \*(Aq,x\*(Aq for a device which does not support it results +in I/O errors and may disconnect the drive. The same applies if the specified +PORT does not exist or is not connected to a disk. +.Sp +The Prolific PL2507/3507 USB bridges with older firmware support a pass-through +command similar to JMicron and work with \*(Aq\-d usbjmicron,0\*(Aq. +Newer Prolific firmware requires a modified command which can be selected by +\*(Aq\-d usbjmicron,p\*(Aq. +Note that this does not yet support the SMART status command. +.Sp +.I usbprolific +\- this device type is for SATA disks that are behind a Prolific +PL2571/2771/2773/2775 USB to SATA bridge. +.Sp +.I usbsunplus +\- this device type is for SATA disks that are behind a SunplusIT USB to SATA +bridge. +.Sp +.I sntasmedia +\- [NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +this device type is for NVMe disks that are behind an ASMedia USB to NVMe +bridge. +.Sp +.I sntjmicron[,NSID] +\- this device type is for NVMe disks that are behind a JMicron USB to NVMe +bridge. +The optional parameter NSID specifies the namespace id (in hex) passed +to the driver. +The default namespace id is the broadcast namespace id (0xffffffff). +.Sp +.I sntrealtek +\- this device type is for NVMe disks that are behind a Realtek USB to NVMe +bridge. +.Sp +.\" %ENDIF NOT OS Darwin +.\" %IF OS Linux +.I marvell +\- [Linux only] (deprecated and subject to remove). +.Sp +.\" %ENDIF OS Linux +.\" %IF OS FreeBSD Linux +.I megaraid,N +\- [FreeBSD and Linux only] the device consists of one or more SCSI/SAS disks connected +to a MegaRAID controller. The non-negative integer N (in the range of 0 to +127 inclusive) denotes which disk on the controller is monitored. This interface +will also work for Dell PERC controllers. +Use syntax such as: +.\" %ENDIF OS FreeBSD Linux +.\" %IF OS ALL +.br +FreeBSD: +.\" %ENDIF OS ALL +.\" %IF OS FreeBSD +.br +\fBsmartctl \-a \-d megaraid,2 /dev/mfi0\fP +.br +\fBsmartctl \-a \-d megaraid,0 /dev/mrsas0\fP +.Sp +.\" %ENDIF OS FreeBSD +.\" %IF OS ALL +Linux: +.\" %ENDIF OS ALL +.\" %IF OS Linux +.br +\fBsmartctl \-a \-d megaraid,2 /dev/sda\fP +.br +\fBsmartctl \-a \-d megaraid,0 /dev/sdb\fP +.br +\fBsmartctl \-a \-d megaraid,0 /dev/bus/0\fP +.br +It is possible to set RAID device name as /dev/bus/N, where N is a SCSI bus +number. +.Sp +The following entry in /proc/devices must exist: +.br +For PERC2/3/4 controllers: \fBmegadevN\fP +.br +For PERC5/6 controllers: \fBmegaraid_sas_ioctlN\fP +.Sp +.\" %ENDIF OS Linux +.\" %IF OS Linux Windows Cygwin +.I aacraid,H,L,ID +\- [Linux, Windows and Cygwin only] the device consists of one or more +SCSI/SAS or SATA disks connected to an AacRaid controller. +The non-negative integers H,L,ID (Host number, Lun, ID) denote which disk +on the controller is monitored. +Use syntax such as: +.br +\fBsmartctl \-a \-d aacraid,0,0,2 /dev/sda\fP +.br +\fBsmartctl \-a \-d aacraid,1,0,4 /dev/sdb\fP +.Sp +Option \*(Aq\-d sat,auto+...\*(Aq is implicitly enabled to detect SATA disks. +Use \*(Aq\-d scsi+aacraid,H,L,ID\*(Aq to disable it. +.Sp +.\" %ENDIF OS Linux Windows Cygwin +.\" %IF OS Linux +On Linux, the following entry in /proc/devices must exist: \fBaac\fP. +Character device nodes /dev/aacH (H=Host number) are created if required. +.Sp +.\" %ENDIF OS Linux +.\" %IF OS Windows Cygwin +On Windows, the device name parameter /dev/sdX is ignored if +\*(Aq\-d aacraid\*(Aq is specified. +.Sp +.\" %ENDIF OS Windows Cygwin +.\" %IF OS FreeBSD Linux +.I 3ware,N +\- [FreeBSD and Linux only] the device consists of one or more ATA disks +connected to a 3ware RAID controller. The non-negative integer N +(in the range from 0 to 127 inclusive) denotes which disk on the controller +is monitored. +Use syntax such as: +.br +\fBsmartctl \-a \-d 3ware,2 /dev/sda\fP [Linux only] +.br +\fBsmartctl \-a \-d 3ware,0 /dev/twe0\fP +.br +\fBsmartctl \-a \-d 3ware,1 /dev/twa0\fP +.br +\fBsmartctl \-a \-d 3ware,1 /dev/twl0\fP [Linux only] +.br +\fBsmartctl \-a \-d 3ware,1 /dev/tws0\fP [FreeBSD only] +.br +The first two forms, which refer to devices /dev/sda\-z (deprecated) +and /dev/twe0\-15, may be used with 3ware series 6000, 7000, and 8000 +series controllers that use the 3x-xxxx driver. +The devices /dev/twa0\-15, must be used with 3ware 9000 series controllers, +which use the 3w\-9xxx driver. +The devices /dev/twl0\-15 [Linux] or /dev/tws0\-15 [FreeBSD] must be used +with the 3ware/LSI 9750 series controllers which use the 3w-sas driver. +.Sp +Note that if the special character device nodes /dev/tw[ls]?, /dev/twa? +and /dev/twe? do not exist, or exist with the incorrect major or minor +numbers, smartctl will recreate them on the fly. +.Sp +.\" %ENDIF OS FreeBSD Linux +.\" %IF OS FreeBSD Linux Windows Cygwin +.I areca,N +\- [FreeBSD, Linux, Windows and Cygwin only] the device consists of one or +more SATA disks connected to an Areca SATA RAID controller. +The positive integer N (in the range from 1 to 24 inclusive) denotes which +disk on the controller is monitored. +.\" %ENDIF OS FreeBSD Linux Windows Cygwin +.\" %IF OS Linux +On Linux use syntax such as: +.br +\fBsmartctl \-a \-d areca,2 /dev/sg2\fP +.br +\fBsmartctl \-a \-d areca,3 /dev/sg3\fP +.br +.\" %ENDIF OS Linux +.\" %IF OS FreeBSD +On FreeBSD use syntax such as: +.br +\fBsmartctl \-a \-d areca,2 /dev/arcmsr1\fP +.br +\fBsmartctl \-a \-d areca,3 /dev/arcmsr2\fP +.br +.\" %ENDIF OS FreeBSD +.\" %IF OS Windows Cygwin +On Windows and Cygwin use syntax such as: +.br +\fBsmartctl \-a \-d areca,2 /dev/arcmsr0\fP +.br +\fBsmartctl \-a \-d areca,3 /dev/arcmsr1\fP +.br +.\" %ENDIF OS Windows Cygwin +.\" %IF OS FreeBSD Linux Windows Cygwin +The first line above addresses the second disk on the first Areca RAID +controller. +The second line addresses the third disk on the second Areca RAID +controller. +.\" %ENDIF OS FreeBSD Linux Windows Cygwin +.\" %IF OS Linux +To help identify the correct device on Linux, use the command: +.br +\fBcat /proc/scsi/sg/device_hdr /proc/scsi/sg/devices\fP +.br +to show the SCSI generic devices (one per line, starting with +/dev/sg0). The correct SCSI generic devices to address for +smartmontools are the ones with the type field equal to 3. If the +incorrect device is addressed, please read the warning/error messages +carefully. They should provide hints about what devices to use. +.\" %ENDIF OS Linux +.\" %IF OS FreeBSD Linux Windows Cygwin +.Sp +Important: the Areca controller must have firmware version 1.46 or +later. Lower-numbered firmware versions will give (harmless) SCSI +error messages and no SMART information. +.Sp +.I areca,N/E +\- [FreeBSD, Linux, Windows and Cygwin only] the device consists of one +or more SATA or SAS disks connected to an Areca SAS RAID controller. +The integer N (range 1 to 128) denotes the channel (slot) and E (range +1 to 8) denotes the enclosure. +Important: This requires Areca SAS controller firmware version 1.51 or later. +.Sp +.\" %ENDIF OS FreeBSD Linux Windows Cygwin +.\" %IF OS FreeBSD Linux +.I cciss,N +\- [FreeBSD and Linux only] the device consists of one or more SCSI/SAS or +SATA disks connected to a cciss RAID controller. +The non-negative integer N (in the range from 0 to 15 inclusive) denotes +which disk on the controller is monitored. +.Sp +Option \*(Aq\-d sat,auto+...\*(Aq is implicitly enabled to detect SATA disks. +Use \*(Aq\-d scsi+cciss,N\*(Aq to disable it. +.Sp +To look at disks behind HP Smart Array controllers, use syntax +such as: +.\" %ENDIF OS FreeBSD Linux +.\" %IF OS Linux +.br +\fBsmartctl \-a \-d cciss,0 /dev/cciss/c0d0\fP (cciss driver under Linux) +.br +\fBsmartctl \-a \-d cciss,0 /dev/sg2\fP (hpsa or hpahcisr drivers under Linux) +.\" %ENDIF OS Linux +.\" %IF OS FreeBSD +.br +\fBsmartctl \-a \-d cciss,0 /dev/ciss0\fP (under FreeBSD) +.\" %ENDIF OS FreeBSD +.\" %IF OS FreeBSD Linux +.Sp +.I hpt,L/M/N +\- [FreeBSD and Linux only] the device consists of one or more ATA disks +connected to a HighPoint RocketRAID controller. The integer L is the +controller id, the integer M is the channel number, and the integer N +is the PMPort number if it is available. The allowed values of L are +from 1 to 4 inclusive, M are from 1 to 128 inclusive and N from 1 to 4 +if PMPort available. And also these values are limited by the model +of the HighPoint RocketRAID controller. +Use syntax such as: +.\" %ENDIF OS FreeBSD Linux +.\" %IF OS Linux +.br +\fBsmartctl \-a \-d hpt,1/3 /dev/sda\fP (under Linux) +.br +\fBsmartctl \-a \-d hpt,1/2/3 /dev/sda\fP (under Linux) +.\" %ENDIF OS Linux +.\" %IF OS FreeBSD +.br +\fBsmartctl \-a \-d hpt,1/3 /dev/hptrr\fP (under FreeBSD) +.br +\fBsmartctl \-a \-d hpt,1/2/3 /dev/hptrr\fP (under FreeBSD) +.\" %ENDIF OS FreeBSD +.\" %IF OS FreeBSD Linux +.br +Note that the /dev/sda\-z form should be the device node which stands for +the disks derived from the HighPoint RocketRAID controllers under Linux and +under FreeBSD, it is the character device which the driver registered (eg, +/dev/hptrr, /dev/hptmv6). +.\" %ENDIF OS FreeBSD Linux +.Sp +.\" %IF OS Linux +.I sssraid,E,S +\- [Linux only: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +the device consists of one or more SCSI/SAS or SATA disks connected to a +SSSRAID controller. +The non-negative integer E (in the range of 0 to 8) denotes the enclosure +and S (range 0 to 128) denotes the slot. +Use syntax such as: +.br +\fBsmartctl \-a \-d sssraid,0,1 /dev/bsg/sssraid0\fP +.br +It is possible to set RAID device name as /dev/bsg/sssraidN, where N is a +SCSI bus number. +.Sp +.\" %ENDIF OS Linux +.I intelliprop,N[+TYPE] +\- (deprecated and subject to remove). +.Sp +.I jmb39x[\-q],N[,sLBA][,force][+TYPE] +\- the device consists of multiple SATA disks connected to a JMicron JMB39x +RAID port multiplier. +The suffix \*(Aq\-q\*(Aq selects a slightly different command variant used by +some QNAP NAS devices. +The integer N is the port number from 0 to 4. +.br +\fBWARNING: The ATA pass-through commands are issued via READ/WRITE commands +to a LBA of the RAID volume. +Using this option with other devices may overwrite this sector.\fP +.br +The default LBA is 33. +The LBA could be selected in the range from 1 to 255 inclusive. +.br +If a GPT partition table is used, LBA 33 contains the last 4 (of 128) +entries of the partition table. +These entries are zero filled in most cases. +If a MBR partition table is used, LBA 33 may be zero filled or may contain +code from a boot loader. +.br +By default, access to the device is refused if the selected sector is not +zero filled. +The \*(Aqforce\*(Aq flag disables this check. +.br +\fBWARNING: Original sector data is not written back if smartctl is aborted +with a signal.\fP +.Sp +.I jms56x,N[,sLBA][,force][+TYPE] +\- the device consists of multiple SATA disks connected to a JMicron JMS56x +USB to SATA RAID bridge. +See \*(Aqjmb39x...\*(Aq above for valid arguments. +.TP +.B \-T TYPE, \-\-tolerance=TYPE +[ATA only] Specifies how tolerant \fBsmartctl\fP should be of ATA and SMART +command failures. +.Sp +The behavior of \fBsmartctl\fP depends upon whether the command is +"\fBoptional\fP" or "\fBmandatory\fP". Here "\fBmandatory\fP" means +"required by the ATA Specification if the device implements +the SMART command set" and "\fBoptional\fP" means "not required by the +ATA Specification even if the device implements the SMART +command set." The "\fBmandatory\fP" ATA and SMART commands are: (1) +ATA IDENTIFY DEVICE, (2) SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE, (3) +SMART ENABLE/DISABLE, and (4) SMART RETURN STATUS. +.Sp +The valid arguments to this option are: +.Sp +.I normal +\- exit on failure of any \fBmandatory\fP SMART command, and ignore +all failures of \fBoptional\fP SMART commands. This is the default. +Note that on some devices, issuing unimplemented optional SMART +commands doesn't cause an error. This can result in misleading +\fBsmartctl\fP messages such as "Feature X not implemented", followed +shortly by "Feature X: enabled". In most such cases, contrary to the +final message, Feature X is \fBnot\fP enabled. +.Sp +.I conservative +\- exit on failure of any \fBoptional\fP SMART command. +.Sp +.I permissive +\- ignore failure(s) of \fBmandatory\fP SMART commands. This option +may be given more than once. Each additional use of this option will +cause one more additional failure to be ignored. Note that the use of +this option can lead to messages like "Feature X not supported", +followed shortly by "Feature X enable failed". In a few +such cases, contrary to the final message, Feature X \fBis\fP enabled. +.Sp +.I verypermissive +\- equivalent to giving a large number of \*(Aq\-T permissive\*(Aq options: +ignore failures of \fBany number\fP of \fBmandatory\fP SMART commands. +Please see the note above. +.TP +.B \-b TYPE, \-\-badsum=TYPE +[ATA only] Specifies the action \fBsmartctl\fP should take if a checksum +error is detected in the: (1) Device Identity Structure, (2) SMART +Self-Test Log Structure, (3) SMART Attribute Value Structure, (4) SMART +Attribute Threshold Structure, or (5) ATA Error Log Structure. +.Sp +The valid arguments to this option are: +.Sp +.I warn +\- report the incorrect checksum but carry on in spite of it. This is the +default. +.Sp +.I exit +\- exit \fBsmartctl\fP. +.Sp +.I ignore +\- continue silently without issuing a warning. +.TP +.B \-r TYPE, \-\-report=TYPE +Intended primarily to help \fBsmartmontools\fP developers understand +the behavior of \fBsmartmontools\fP on non-conforming or poorly +conforming hardware. This option reports details of \fBsmartctl\fP +transactions with the device. The option can be used multiple times. +When used just once, it shows a record of the ioctl() transactions +with the device. When used more than once, the detail of these +ioctl() transactions are reported in greater detail. The valid +arguments to this option are: +.Sp +.I ioctl +\- report all ioctl() transactions. +.Sp +.I ataioctl +\- report only ioctl() transactions with ATA devices. +.Sp +.I scsiioctl +\- report only ioctl() transactions with SCSI devices. +Invoking this once shows the SCSI commands in hex and the corresponding status. +Invoking it a second time adds a hex listing of the first 64 bytes of data +send to, or received from the device. +.Sp +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I nvmeioctl +\- report only ioctl() transactions with NVMe devices. +.Sp +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +Any argument may include a positive integer to specify the level of detail +that should be reported. The argument should be followed by a comma then +the integer with no spaces. For example, +.I ataioctl,2 +The default level is 1, so \*(Aq\-r ataioctl,1\*(Aq and \*(Aq\-r ataioctl\*(Aq +are equivalent. +.Sp +For testing purposes, the output of \*(Aq\-r ataioctl,2\*(Aq can later be parsed +by \fBsmartctl\fP itself if \*(Aq\-\*(Aq is used as device path argument. +The ATA command input parameters, sector data and return values are +reconstructed from the debug report read from stdin. +Then \fBsmartctl\fP internally simulates an ATA device with the same +behaviour. +This is does not work for SCSI devices yet. +.TP +.B \-n POWERMODE[,STATUS[,STATUS2]], \-\-nocheck=POWERMODE[,STATUS[,STATUS2]] +[ATA, SCSI] Specifies if \fBsmartctl\fP should exit before performing any +checks when the device is in a low-power mode. +It may be used to prevent a disk from being spun-up by \fBsmartctl\fP. +The power mode is ignored by default. +.Sp +Note: If this option is used it may also be necessary to specify the device +type with the \*(Aq\-d\*(Aq option. Otherwise the device may spin up due to +commands issued during device type autodetection. +.Sp +By default, exit status 2 is returned if the device is in one of the +specified low-power modes. +This status is also returned if the device open or identification failed +(see EXIT STATUS below). +The optional STATUS parameter allows one to override this default. +STATUS is an integer in the range from 0 to 255 inclusive. +For example use \*(Aq\-n standby,0\*(Aq to return success if a device is in +SLEEP or STANDBY mode. +Use \*(Aq\-n standby,3\*(Aq to return a unique exit status in this case. +.Sp +The valid arguments to this option are: +.Sp +.I never +\- check the device always, but print the power mode if \*(Aq\-i\*(Aq is +specified. +.Sp +.I sleep[,STATUS[,STATUS2]] +\- check the device unless it is in SLEEP mode. +.Sp +.I standby[,STATUS[,STATUS2]] +\- check the device unless it is in SLEEP or STANDBY mode. In +these modes most disks are not spinning, so if you want to prevent +a disk from spinning up, this is probably what you want. +.Sp +.I idle[,STATUS[,STATUS2]] +\- check the device unless it is in SLEEP, STANDBY or IDLE mode. +In the IDLE state, most disks are still spinning, so this is probably +not what you want. +.Sp +The \*(Aq\-n\*(Aq option is ignored if the power mode check is not supported +or returns an unknown value. +.br +[ATA only: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +If the optional STATUS2 parameter is specified, \fBsmartctl\fP exits +immediately with STATUS2 in this case. +For example use \*(Aq\-n standby,3,5\*(Aq to return unique exit statuses in +the STANDBY and UNSUPPORTED cases. +.TP +.B SMART FEATURE ENABLE/DISABLE COMMANDS: +.IP +.B Note: +if multiple options are used to both enable and disable a +feature, then +.B both +the enable and disable commands will be issued. The enable command +will always be issued +.B before +the corresponding disable command. +.TP +.B \-s VALUE, \-\-smart=VALUE +Enables or disables SMART on device. The valid arguments to +this option are \fIon\fP and \fIoff\fP. +.Sp +[ATA] +Note that the ATA commands SMART ENABLE/DISABLE OPERATIONS were declared +obsolete in ATA ACS-4 Revision 10 (Nov 2015). +.Sp +[SCSI tape drive or changer] +It is not necessary (or useful) to enable SMART to see the TapeAlert messages. +.TP +.B \-o VALUE, \-\-offlineauto=VALUE +[ATA only] Enables or disables SMART automatic offline test, which scans the +drive every four hours for disk defects. +This command can be given during normal system operation. +The valid arguments to this option are \fIon\fP and \fIoff\fP. +.Sp +Note that the SMART automatic offline test command is listed as +"Obsolete" in every version of the ATA and ATA/ATAPI Specifications. +It was originally part of the SFF-8035i Revision 2.0 specification, +but was never part of any ATA specification. However it is +implemented and used by many vendors. +You can tell if automatic offline testing is supported by seeing if +this command enables and disables it, as indicated by the \*(AqAuto +Offline Data Collection\*(Aq part of the SMART capabilities report +(displayed with \*(Aq\-c\*(Aq). +.Sp +SMART provides \fBthree\fP basic categories of testing. The +\fBfirst\fP category, called "online" testing, has no effect on the +performance of the device. It is turned on by the \*(Aq\-s on\*(Aq option. +.Sp +The \fBsecond\fP category of testing is called "offline" testing. +This type of test can, in principle, degrade the device performance. +The \*(Aq\-o on\*(Aq option causes this offline testing to be carried out, +automatically, on a regular scheduled basis. Normally, the disk will +suspend offline testing while disk accesses are taking place, and then +automatically resume it when the disk would otherwise be idle, so in +practice it has little effect. Note that a one-time offline test can +also be carried out immediately upon receipt of a user command. See +the \*(Aq\-t offline\*(Aq option below, which causes a one-time offline test +to be carried out immediately. +.Sp +The choice (made by the SFF-8035i and ATA specification authors) of +the word \fItesting\fP for these first two categories is unfortunate, +and often leads to confusion. In fact these first two categories of +online and offline testing could have been more accurately described +as online and offline \fBdata collection\fP. +.Sp +The results of this automatic or immediate offline testing (data +collection) are reflected in the values of the SMART Attributes. +Thus, if problems or errors are detected, the values of these +Attributes will go below their failure thresholds; some types of +errors may also appear in the SMART error log. +These are visible with the \*(Aq\-A\*(Aq and \*(Aq\-l error\*(Aq options +respectively. +.Sp +Some SMART attribute values are updated only during off-line data +collection activities; the rest are updated during normal operation of +the device or during both normal operation and off-line testing. The +Attribute value table produced by the \*(Aq\-A\*(Aq option indicates this in +the UPDATED column. Attributes of the first type are labeled +"Offline" and Attributes of the second type are labeled "Always". +.Sp +The \fBthird\fP category of testing (and the \fIonly\fP category for +which the word \*(Aqtesting\*(Aq is really an appropriate choice) is "self" +testing. This third type of test is only performed (immediately) when +a command to run it is issued. +The \*(Aq\-t\*(Aq and \*(Aq\-X\*(Aq options can be used to carry out and +abort such self-tests; please see below for further details. +.Sp +Any errors detected in the self testing will be shown in the +SMART self-test log, which can be examined using the \*(Aq\-l selftest\*(Aq +option. +.Sp +\fBNote:\fP in this manual page, the word \fB"Test"\fP is used in +connection with the second category just described, e.g.\& for the +"offline" testing. The words \fB"Self-test"\fP are used in +connection with the third category. +.TP +.B \-S VALUE, \-\-saveauto=VALUE +[ATA] Enables or disables SMART autosave of device vendor-specific +Attributes. The valid arguments to this option are \fIon\fP +and \fIoff\fP. Note that this feature is preserved across disk power +cycles, so you should only need to issue it once. +.Sp +The ATA standard does not specify a method to check whether SMART +autosave is enabled. +Unlike SCSI (below), smartctl is unable to print a warning if autosave is +disabled. +.Sp +Note that the ATA commands SMART ENABLE/DISABLE AUTOSAVE were declared +obsolete in ATA ACS-4 Revision 10 (Nov 2015). +.Sp +[SCSI] For SCSI devices this toggles the value of the Global Logging +Target Save Disabled (GLTSD) bit in the Control Mode Page. Some disk +manufacturers set this bit by default. This prevents error counters, +power-up hours and other useful data from being placed in non-volatile +storage, so these values may be reset to zero the next time the device +is power-cycled. If the GLTSD bit is set then \*(Aqsmartctl \-a\*(Aq will +issue a warning. Use \fIon\fP to clear the GLTSD bit and thus enable +saving counters to non-volatile storage. For extreme streaming-video +type applications you might consider using \fIoff\fP to set the GLTSD +bit. +.TP +.B \-g NAME, \-\-get=NAME, \-s NAME[,VALUE], \-\-set=NAME[,VALUE] +Gets/sets non-SMART device settings. +Note that the \*(Aq\-\-set\*(Aq option shares its short option \*(Aq\-s\*(Aq +with \*(Aq\-\-smart\*(Aq. +Valid arguments are: +.Sp +.I all +\- Gets all values. +This is equivalent to +.br +\*(Aq\-g aam \-g apm \-g lookahead \-g security \-g wcache \-g rcache \-g dsn\*(Aq +.Sp +.I aam[,N|off] +\- [ATA only] Gets/sets the Automatic Acoustic Management (AAM) feature +(if supported). A value of 128 sets the most quiet (slowest) mode and 254 +the fastest (loudest) mode, \*(Aqoff\*(Aq disables AAM. Devices may support +intermediate levels. Values below 128 are defined as vendor specific (0) +or retired (1 to 127). Note that the AAM feature was declared obsolete in +ATA ACS-2 Revision 4a (Dec 2010). +.Sp +.I apm[,N|off] +\- [ATA only] Gets/sets the Advanced Power Management (APM) feature on +device (if supported). If a value between 1 and 254 is provided, it will +attempt to enable APM and set the specified value, \*(Aqoff\*(Aq disables APM. +Note the actual behavior depends on the drive, for example some drives disable +APM if their value is set above 128. Values below 128 are supposed to allow +drive spindown, values 128 and above adjust only head-parking frequency, +although the actual behavior defined is also vendor-specific. +.Sp +.I lookahead[,on|off] +\- [ATA only] Gets/sets the read look-ahead feature (if supported). +Read look-ahead is usually enabled by default. +.Sp +.I security +\- [ATA only] Gets the status of ATA Security feature (if supported). +If ATA Security is enabled an ATA user password is set. The drive will be +locked on next reset then. +.Sp +.I security-freeze +\- [ATA only] Sets ATA Security feature to frozen mode. This prevents that +the drive accepts any security commands until next reset. Note that the +frozen mode may already be set by BIOS or OS. +.Sp +.I standby,[N|off] +\- [ATA] Sets the standby (spindown) timer and places the drive in +the IDLE mode. A value of 0 or \*(Aqoff\*(Aq disables the standby timer. +Values from 1 to 240 specify timeouts from 5 seconds to 20 minutes in 5 +second increments. Values from 241 to 251 specify timeouts from 30 minutes +to 330 minutes in 30 minute increments. Value 252 specifies 21 minutes. +Value 253 specifies a vendor specific time between 8 and 12 hours. Value +255 specifies 21 minutes and 15 seconds. Some drives may use a vendor +specific interpretation for the values. Note that there is no get option +because ATA standards do not specify a method to read the standby timer. +If \*(Aq\-s standby,now\*(Aq is also specified, the drive is immediately +placed in the STANDBY mode without temporarily placing it in the IDLE mode. +Note that ATA standards do not specify a command to set the standby timer +without affecting the power mode. +.br +[SCSI] Only the set option with \*(Aqstandby,off\*(Aq or +\*(Aqstandby,0\*(Aq is accepted and will place the SCSI disk +into "ACTIVE" power condition. +.Sp +.I standby,now +\- [ATA] Places the drive in the STANDBY mode. +This usually spins down the drive. +The setting of the standby timer is not affected unless +\*(Aq\-s standby,[N|off]\*(Aq is also specified. +.br +[SCSI] Only the set option is accepted and will place the SCSI +disk into "STANDBY_Z" power condition. +.Sp +.I wcache[,on|off] +\- [ATA] Gets/sets the volatile write cache feature (if supported). +The write cache is usually enabled by default. +.Sp +.I wcache[,on|off] +\- [SCSI] Gets/sets the \*(AqWrite Cache Enable\*(Aq (WCE) bit (if supported). +The write cache is usually enabled by default. +.Sp +.I wcache-sct[,ata|on|off[,p]] +\- [ATA only] Gets/sets the write cache feature through SCT Feature Control +(if supported). +The state of write cache in SCT Feature Control could be "Controlled by ATA", +"Force Enabled", or "Force Disabled". +SCT Feature control overwrites the setting by ATA Set Features command +(wcache[,on|off] option). +If SCT Feature Control sets write cache as "Force Enabled" or "Force Disabled", +the setting of wcache[,on|off] is ignored by the drive. +SCT Feature Control usually sets write cache as "Controlled by ATA" by default. +If \*(Aq,p\*(Aq is specified, the setting is preserved across power cycles. +.Sp +.I wcreorder[,on|off[,p]] +\- [ATA only] Gets/sets Write Cache Reordering. +If it is disabled (off), disk write scheduling is executed on a +first-in-first-out (FIFO) basis. If Write Cache Reordering is enabled (on), +then disk write scheduling may be reordered by the drive. If write cache is +disabled, the current Write Cache Reordering state is remembered but has +no effect on non-cached writes, which are always written in the order received. +The state of Write Cache Reordering has no effect on either NCQ or LCQ queued +commands. +If \*(Aq,p\*(Aq is specified, the setting is preserved across power cycles. +.Sp +.I rcache[,on|off] +\- [SCSI only] Gets/sets the \*(AqRead Cache Disable\*(Aq (RCE) bit. +\*(AqOff\*(Aq value disables read cache (if supported). +The read cache is usually enabled by default. +.Sp +.I dsn[,on|off] +\- [ATA only] Gets/sets the DSN feature (if supported). +The dsn is usually disabled by default. +.Sp +.TP +.B SMART READ AND DISPLAY DATA OPTIONS: +.TP +.B \-H, \-\-health +Prints the health status of the device. +.Sp +If the device reports failing health status, this means +.B either +that the device has already failed, +.B or +that it is predicting its own failure within the next 24 hours. +If this happens, use the \*(Aq\-x\*(Aq option to get more information, and +.B get your data off the disk and to someplace safe as soon as you can. +.Sp +[ATA] Health status is obtained by checking the (boolean) result returned +by the SMART RETURN STATUS command. +The return value of this ATA command may be unknown due to limitations or +bugs in some layer (e.g.\& RAID controller or USB bridge firmware) between +disk and operating system. +In this case, \fBsmartctl\fP prints a warning and checks whether any +Prefailure SMART Attribute value is less than or equal to its threshold +(see \*(Aq\-A\*(Aq below). +.Sp +[SCSI] Health status is obtained by checking the Additional Sense Code +(ASC) and Additional Sense Code Qualifier (ASCQ) from Informal Exceptions +(IE) log page (if supported) and/or from SCSI sense data. +.Sp +[SCSI tape drive or changer] The TapeAlert status is obtained by reading the +TapeAlert log page, but only if this option is given twice (see +\fBTAPE DRIVES\fP for the rationale). +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +[NVMe] NVMe status is obtained by reading the "Critical Warning" byte from +the SMART/Health Information log. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-c, \-\-capabilities +[ATA] Prints only the generic SMART capabilities. These +show what SMART features are implemented and how the device will +respond to some of the different SMART commands. For example it +shows if the device logs errors, if it supports offline surface +scanning, and so on. If the device can carry out self-tests, this +option also shows the estimated time required to run those tests. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +[NVMe] Prints various NVMe device capabilities obtained from the Identify +Controller and the Identify Namespace data structure. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-A, \-\-attributes +[ATA] Prints only the vendor specific SMART Attributes. The Attributes +are numbered from 1 to 253 and have specific names and ID numbers. +For example Attribute 12 is "power cycle count": how many times has the +disk been powered up. +.Sp +Each Attribute has a "Raw" value, printed under the heading +"RAW_VALUE", and a "Normalized" value printed under the heading +"VALUE". [Note: \fBsmartctl\fP prints these values in base-10.] In +the example just given, the "Raw Value" for Attribute 12 would be the +actual number of times that the disk has been power-cycled, for +example 365 if the disk has been turned on once per day for exactly +one year. Each vendor uses their own algorithm to convert this "Raw" +value to a "Normalized" value in the range from 1 to 254. Please keep +in mind that \fBsmartctl\fP only reports the different Attribute +types, values, and thresholds as read from the device. It does +\fBnot\fP carry out the conversion between "Raw" and "Normalized" +values: this is done by the disk's firmware. +.Sp +The conversion from Raw value to a quantity with physical units is +not specified by the SMART standard. In most cases, the values printed +by \fBsmartctl\fP are sensible. For example the temperature Attribute +generally has its raw value equal to the temperature in Celsius. +However in some cases vendors use unusual conventions. For example +the Hitachi disk on my laptop reports its power-on hours in minutes, +not hours. Some IBM disks track three temperatures rather than one, in +their raw values. And so on. +.Sp +Each Attribute also has a Threshold value (whose range is 0 to 255) +which is printed under the heading "THRESH". If the Normalized value +is \fBless than or equal to\fP the Threshold value, then the Attribute +is said to have failed. If the Attribute is a pre-failure Attribute, +then disk failure is imminent. +.Sp +Each Attribute also has a "Worst" value shown under the heading +"WORST". This is the smallest (closest to failure) value that the +disk has recorded at any time during its lifetime when SMART was +enabled. [Note however that some vendors firmware may actually +\fBincrease\fP the "Worst" value for some "rate-type" Attributes.] +.Sp +The Attribute table printed out by \fBsmartctl\fP also shows the +"TYPE" of the Attribute. Attributes are one of two possible types: +Pre-failure or Old age. Pre-failure Attributes are ones which, if +less than or equal to their threshold values, indicate pending disk +failure. Old age, or usage Attributes, are ones which indicate +end-of-product life from old-age or normal aging and wearout, if +the Attribute value is less than or equal to the threshold. \fBPlease +note\fP: the fact that an Attribute is of type 'Pre-fail' does +\fBnot\fP mean that your disk is about to fail! It only has this +meaning if the Attribute's current Normalized value is less than or +equal to the threshold value. +.Sp +If the Attribute's current Normalized value is less than or equal to +the threshold value, then the "WHEN_FAILED" column will display +"FAILING_NOW". If not, but the worst recorded value is less than or +equal to the threshold value, then this column will display +"In_the_past". If the "WHEN_FAILED" column has no entry (indicated by +a dash: \*(Aq\-\*(Aq) then this Attribute is OK now (not failing) and has +also never failed in the past. +.Sp +The table column labeled "UPDATED" shows if the SMART Attribute values +are updated during both normal operation and off-line testing, or +only during offline testing. The former are labeled "Always" and the +latter are labeled "Offline". +.Sp +So to summarize: the Raw Attribute values are the ones that might have +a real physical interpretation, such as "Temperature Celsius", +"Hours", or "Start-Stop Cycles". Each manufacturer converts these, +using their detailed knowledge of the disk's operations and failure +modes, to Normalized Attribute values in the range 1\(en254. The +current and worst (lowest measured) of these Normalized Attribute +values are stored on the disk, along with a Threshold value that the +manufacturer has determined will indicate that the disk is going to +fail, or that it has exceeded its design age or aging limit. +\fBsmartctl\fP does \fBnot\fP calculate any of the Attribute values, +thresholds, or types, it merely reports them from the SMART data on +the device. +.Sp +Note that starting with ATA/ATAPI-4, revision 4, the meaning of these +Attribute fields has been made entirely vendor-specific. However most +newer ATA/SATA disks seem to respect their meaning, so we have retained +the option of printing the Attribute values. +.Sp +Solid-state drives use different meanings for some of the attributes. +In this case the attribute name printed by smartctl is incorrect unless +the drive is already in the smartmontools drive database. +.Sp +Note that the ATA command SMART READ DATA was declared obsolete in +ATA ACS-4 Revision 10 (Nov 2015). +.Sp +[SCSI] For SCSI devices the "attributes" are obtained from the temperature +and start-stop cycle counter log pages. +Certain vendor specific attributes are listed if recognised. +The attributes are output in a relatively free format (compared with ATA +disk attributes). +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +[NVMe] For NVMe devices the attributes are obtained from the SMART/Health +Information log. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.TP +.B \-f FORMAT, \-\-format=FORMAT +[ATA only] Selects the output format of the attributes: +.Sp +.I old +\- Old smartctl format. +This is the default unless the \*(Aq\-x\*(Aq option is specified. +.Sp +.I brief +\- New format which fits into 80 columns (except in some rare cases). +This format also decodes four additional attribute flags. +This is the default if the \*(Aq\-x\*(Aq option is specified. +.Sp +.I hex,id +\- Print all attribute IDs as hexadecimal numbers. +.Sp +.I hex,val +\- Print all normalized values as hexadecimal numbers. +.Sp +.I hex +\- Same as \*(Aq\-f hex,id \-f hex,val\*(Aq. +.TP +.B \-l TYPE, \-\-log=TYPE +Prints various device logs. +The valid arguments to this option are: +.Sp +.I error +\- [ATA] prints the Summary SMART error log. SMART disks maintain a log +of the most recent five non-trivial errors. For each of these errors, the +disk power-on lifetime at which the error occurred is recorded, as is +the device status (idle, standby, etc) at the time of the error. For +some common types of errors, the Error Register (ER) and Status +Register (SR) values are decoded and printed as text. +The meanings of these are: +.Vb 5 + \fBABRT\fP: Command \fBAB\fPo\fBRT\fPed + \fBAMNF\fP: \fBA\fPddress \fBM\fPark \fBN\fPot \fBF\fPound + \fBCCTO\fP: \fBC\fPommand \fBC\fPompletion \fBT\fPimed \fBO\fPut + \fBEOM\fP: \fBE\fPnd \fBO\fPf \fBM\fPedia + \fBICRC\fP: \fBI\fPnterface \fBC\fPyclic \fBR\fPedundancy \fBC\fPode (CRC) error + \fBIDNF\fP: \fBID\fPentity \fBN\fPot \fBF\fPound + \fBILI\fP: (packet command-set specific) + \fBMC\fP: \fBM\fPedia \fBC\fPhanged + \fBMCR\fP: \fBM\fPedia \fBC\fPhange \fBR\fPequest + \fBNM\fP: \fBN\fPo \fBM\fPedia + \fBobs\fP: \fBobs\fPolete + \fBTK0NF\fP: \fBT\fPrac\fBK 0 N\fPot \fBF\fPound + \fBUNC\fP: \fBUNC\fPorrectable Error in Data + \fBWP\fP: Media is \fBW\fPrite \fBP\fProtected +.Ve +In addition, up to the last five commands that preceded the error are +listed, along with a timestamp measured from the start of the +corresponding power cycle. This is displayed in the form +Dd+HH:MM:SS.msec where D is the number of days, HH is hours, MM is +minutes, SS is seconds and msec is milliseconds. [Note: this time +stamp wraps after 2^32 milliseconds, or 49 days 17 hours 2 minutes and +47.296 seconds.] The key ATA disk registers are also recorded in the +log. The final column of the error log is a text-string description +of the ATA command defined by the Command Register (CR) and Feature +Register (FR) values. Commands that are obsolete in the most current +spec are listed like this: \fBREAD LONG (w/ retry) [OBS-4]\fP, +indicating that the command became obsolete with or in the ATA-4 +specification. Similarly, the notation \fB[RET\-\fP\fIN\fP\fB]\fP is +used to indicate that a command was retired in the ATA-\fIN\fP +specification. Some commands are not defined in any version of the +ATA specification but are in common use nonetheless; these are marked +\fB[NS]\fP, meaning non-standard. +.Sp +The ATA Specification (ATA ACS-2 Revision 7, Section A.7.1) says: +\fB"Error log data structures shall include, but are not limited to, +Uncorrectable errors, ID Not Found errors for which the LBA requested was +valid, servo errors, and write fault errors. Error log data structures +shall not include errors attributed to the receipt of faulty commands."\fP +The definitions of these terms are: +.br +\fBUNC\fP (\fBUNC\fPorrectable): data is uncorrectable. This refers +to data which has been read from the disk, but for which the Error +Checking and Correction (ECC) codes are inconsistent. In effect, this +means that the data can not be read. +.br +\fBIDNF\fP (\fBID N\fPot \fBF\fPound): user-accessible address could +not be found. For READ LOG type commands, \fBIDNF\fP can also indicate +that a device data log structure checksum was incorrect. +.Sp +If the command that caused the error was a READ or WRITE command, then +the Logical Block Address (LBA) at which the error occurred will be +printed in base 10 and base 16. The LBA is a linear address, which +counts 512-byte sectors on the disk, starting from zero. (Because of +the limitations of the SMART error log, if the LBA is greater than +0xfffffff, then either no error log entry will be made, or the error +log entry will have an incorrect LBA. This may happen for drives with +a capacity greater than 128 GiB or 137 GB.) On Linux systems the +smartmontools web page has instructions about how to convert the LBA +address to the name of the disk file containing the erroneous disk +sector. +.Sp +Please note that some manufacturers \fBignore\fP the ATA +specifications, and make entries in the error log if the device +receives a command which is not implemented or is not valid. +.Sp +.I error +\- [SCSI] prints the error counter log pages for reads, write and verifies. +The verify row is only output if it has an element other than zero. +.Sp +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I error[,NUM] +\- [NVMe] prints the NVMe Error Information log. +Only the 16 most recent log entries are printed by default. +This number can be changed by the optional parameter NUM. +The maximum number of log entries is vendor specific +(in the range from 1 to 256 inclusive). +.Sp +Note that the contents of this log is not preserved across power cycles or +controller resets, but the value of \*(AqError Information Log Entries\*(Aq +from SMART/Health Information log is. +.Sp +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I xerror[,NUM][,error] +\- [ATA only] prints the Extended Comprehensive SMART error log +(General Purpose Log address 0x03). Unlike the Summary SMART error +log (see \*(Aq\-l error\*(Aq above), it provides sufficient space to log +the contents of the 48-bit LBA register set introduced with ATA-6. +It also supports logs with more than one sector. Each sector holds +up to 4 log entries. +The actual number of log sectors is vendor specific. +.Sp +Only the 8 most recent error log entries are printed by default. +This number can be changed by the optional parameter NUM. +.Sp +If \*(Aq,error\*(Aq is appended and the Extended Comprehensive SMART error +log is not supported, the Summary SMART self-test log is printed. +.Sp +Please note that recent drives may report errors only in the Extended +Comprehensive SMART error log. The Summary SMART error log may be reported +as supported but is always empty then. +.Sp +.I selftest +\- [ATA] prints the SMART self-test log. The disk maintains a self-test +log showing the results of the self tests, which can be run using the +\*(Aq\-t\*(Aq option described below. For each of the most recent +twenty-one self-tests, the log shows the type of test (short or +extended, off-line or captive) and the final status of the test. If +the test did not complete successfully, then the percentage of the +test remaining is shown. The time at which the test took place, +measured in hours of disk lifetime, is also printed. [Note: this time +stamp wraps after 2^16 hours, or 2730 days and 16 hours, or about 7.5 +years.] +If any errors were detected, the Logical Block Address (LBA) +of the first error is printed in decimal notation. +.Sp +.I selftest +\- [SCSI] the self-test log for a SCSI device has a slightly different +format than for an ATA device. For each of the most recent twenty +self-tests, it shows the type of test and the status (final or in +progress) of the test. SCSI standards use the terms "foreground" and +"background" (rather than ATA's corresponding "captive" and +"off-line") and "short" and "long" (rather than ATA's corresponding +"short" and "extended") to describe the type of the test. The printed +segment number is only relevant when a test fails in the third or +later test segment. It identifies the test that failed and consists +of either the number of the segment that failed during the test, or +the number of the test that failed and the number of the segment in +which the test was run, using a vendor-specific method of putting both +numbers into a single byte. The Logical Block Address (LBA) of the +first error is printed in hexadecimal notation. +If provided, the SCSI Sense Key (SK), Additional Sense Code (ASC) and +Additional Sense Code Qualifier (ASCQ) are also printed. The self tests +can be run using the \*(Aq\-t\*(Aq option described below (using the ATA +test terminology). +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I selftest +\- [NVMe: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +prints the NVMe self-test log. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I xselftest[,NUM][,selftest] +\- [ATA only] prints the Extended SMART self-test log (General Purpose +Log address 0x07). Unlike the SMART self-test log (see \*(Aq\-l selftest\*(Aq +above), it supports 48-bit LBA and logs with more than one sector. +Each sector holds up to 19 log entries. +The actual number of log sectors is vendor specific. +.Sp +Only the 25 most recent log entries are printed by default. +This number can be changed by the optional parameter NUM. +.Sp +If \*(Aq,selftest\*(Aq is appended and the Extended SMART self-test log is not +supported, the old SMART self-test log is printed. +.Sp +.I selective +\- [ATA only] Please see the \*(Aq\-t select\*(Aq option below for a +description of selective self-tests. The selective self-test log +shows the start/end Logical Block Addresses (LBA) of each of the five +test spans, and their current test status. If the span is being +tested or the remainder of the disk is being read-scanned, the +current 65536-sector block of LBAs being tested is also displayed. +The selective self-test log also shows if a read-scan of the +remainder of the disk will be carried out after the selective +self-test has completed (see \*(Aq\-t afterselect\*(Aq option) and the time +delay before restarting this read-scan if it is interrupted (see +\*(Aq\-t pending\*(Aq option). +.Sp +.I directory[,gs] +\- [ATA only] if the device supports the General Purpose Logging feature +set (ATA-6 and above) then this prints the Log Directory (the log at +address 0). The Log Directory shows what logs are available and their +length in sectors (512 bytes). The contents of the logs at address 1 +[Summary SMART error log] and at address 6 [SMART self-test log] may +be printed using the previously-described +.I error +and +.I selftest +arguments to this option. +If your version of smartctl supports 48-bit ATA commands, both the +General Purpose Log (GPL) and SMART Log (SL) directories are printed in +one combined table. The output can be restricted to the GPL directory or +SL directory by \*(Aq\-l directory,q\*(Aq or \*(Aq\-l directory,s\*(Aq +respectively. +.Sp +.I background +\- [SCSI only] the background scan results log outputs information derived +from Background Media Scans (BMS) done after power up and/or periodically +(e.g.\& every 24 hours) on recent SCSI disks. If supported, the BMS status +is output first, indicating whether a background scan is currently +underway (and if so a progress percentage), the amount of time the disk +has been powered up and the number of scans already completed. +Then there is a header and a line for each background scan "event". +These will typically be either recovered or unrecoverable errors. +That latter group may need some attention. +There is a description of the background scan mechanism in section 4.18 of +SBC-3 revision 6 (see www.t10.org ). +.Sp +.I scttemp, scttempsts, scttemphist +\- [ATA only] prints the disk temperature information provided by the +SMART Command Transport (SCT) commands. +The option \*(Aqscttempsts\*(Aq prints current temperature and temperature +ranges returned by the SCT Status command, \*(Aqscttemphist\*(Aq prints +temperature limits and the temperature history table returned by +the SCT Data Table command, and \*(Aqscttemp\*(Aq prints both. +The temperature values are preserved across power cycles. +The logging interval can be configured with the +\*(Aq\-l scttempint,N[,p]\*(Aq option, see below. +The SCT commands were introduced in ATA8-ACS and were also +supported by many ATA-7 disks. +.Sp +.I scttempint,N[,p] +\- [ATA only] clears the SCT temperature history table and sets the +time interval for temperature logging to N minutes. +If \*(Aq,p\*(Aq is specified, the setting is preserved across power cycles. +Otherwise, the setting is volatile and will be reverted to the last +non-volatile setting by the next hard reset. The default interval +is vendor specific, typical values are 1, 2, or 5 minutes. +.Sp +.I scterc[,READTIME,WRITETIME][,p|reset] +\- [ATA only] prints values and descriptions of the SCT Error Recovery +Control settings. +These are equivalent to TLER (as used by Western Digital), CCTL (as used +by Samsung and Hitachi/HGST) and ERC (as used by Seagate). +READTIME and WRITETIME arguments (deciseconds) set the specified values. +Values of 0 disable the feature, other values less than 65 are probably not +supported. +For RAID configurations, this is typically set to 70,70 deciseconds. +.br +[NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +If \*(Aqscterc,READTIME,WRITETIME,p\*(Aq is specified, these time values +will be persistent over a power-on reset. +If \*(Aqscterc,p\*(Aq is specified, the persistent over power-on values +are printed. +If \*(Aqscterc,reset\*(Aq is specified, all SCT timer settings are restored +to the manufacturer's default value. +The \*(Aq,p\*(Aq and \*(Aq,reset\*(Aq options require the device to support +ATA ACS-4 or higher. +.Sp +.I devstat[,PAGE] +\- [ATA only] prints values and descriptions of the ATA Device Statistics +log pages (General Purpose Log address 0x04). If no PAGE number is specified, +entries from all supported pages are printed. If PAGE 0 is specified, +the list of supported pages is printed. Device Statistics was +introduced in ACS-2 and is only supported by some recent devices. +.Sp +.I defects[,NUM] +\- [ATA] prints LBA and hours values from the ATA Pending Defects log +(General Purpose Log address 0x0c). +Only the 31 entries from first log page are printed by default. +This number can be changed by the optional parameter NUM. +The size of the log and the order of the entries are vendor specific. +The Pending Defects log was introduced in ACS-4 Revision 01 (Mar 2014). +.Sp +.I defects +\- [SCSI: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] prints LBAs that the background +scan was unable to read (i.e. a defect). Entries, if any, show the defective +LBA and the value of the power\-on hours (since manufacture) when the background +scan found the defect. Note these pending defects may appear in advance of any +application trying to read a defective LBA. +.Sp +.I envrep +\- [SCSI only: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +prints values and descriptions of the SCSI Environmental reporting log +page. This includes one or more temperatures and may include relative +humidities. Lifetime maximums and minimums are also reported. +.Sp +.I genstats +\- [SCSI only: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +prints values and descriptions of the SCSI General statistics and performance +log page. +.Sp +.I sataphy[,reset] +\- [SATA only] prints values and descriptions of the SATA Phy Event +Counters (General Purpose Log address 0x11). If \*(Aq\-l sataphy,reset\*(Aq +is specified, all counters are reset after reading the values. +This also works for SATA devices with Packet interface like CD/DVD +drives. +.Sp +.I sasphy[,reset] +\- [SAS (SCSI) only] prints values and descriptions of the SAS (SSP) +Protocol Specific log page (log page 0x18). If \*(Aq\-l sasphy,reset\*(Aq +is specified, all counters are reset after reading the values. +.Sp +.I tapealert +\- [SCSI tape drives and changers: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +prints values and descriptions of the (SSC) Tape Alert log page. See +\fBTAPE DRIVES\fP below for issue associated with printing this log page. +.Sp +.I tapedevstat +\- [SCSI tape drives and changers: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +prints values and descriptions of the (SSC) Device Statistics log page. +.Sp +.I zdevstat +\- [SCSI zoned disks: NEW EXPERIMENTAL SMARTCTL 7.3 FEATURE] +prints values and descriptions of the Zoned Block Device Statistics log +page (ZBC\-2). +.Sp +.I gplog,ADDR[,FIRST[\-LAST|+SIZE]] +\- [ATA only] prints a hex dump of any log accessible via General +Purpose Logging (GPL) feature. The log address ADDR is the hex address +listed in the log directory (see \*(Aq\-l directory\*(Aq above). +The range of log sectors (pages) can be specified by decimal values +FIRST\-LAST or FIRST+SIZE. FIRST defaults to 0, SIZE defaults to 1. +LAST can be set to \*(Aqmax\*(Aq to specify the last page of the log. +.Sp +.I smartlog,ADDR[,FIRST[\-LAST|+SIZE]] +\- [ATA only] prints a hex dump of any log accessible via SMART Read +Log command. See \*(Aq\-l gplog,...\*(Aq above for parameter syntax. +.Sp +For example, all these commands: +.Vb 3 + smartctl \-l gplog,0x80,10\-15 /dev/sda + smartctl \-l gplog,0x80,10+6 /dev/sda + smartctl \-l smartlog,0x80,10\-15 /dev/sda +.Ve +print pages 10\(en15 of log 0x80 (first host vendor specific log). +.Sp +The hex dump format is compatible with the \*(Aqxxd \-r\*(Aq command. +This command: +.Vb 1 + smartctl \-l gplog,0x11 /dev/sda | grep ^0 | xxd \-r >log.bin +.Ve +writes a binary representation of the one sector log 0x11 +(SATA Phy Event Counters) to file log.bin. +.Sp +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I nvmelog,PAGE,SIZE +\- [NVMe only] prints a hex dump of the first SIZE bytes from the NVMe +log with identifier PAGE. +PAGE is a hexadecimal number in the range from 0x1 to 0xff. +SIZE is a hexadecimal number in the range from 0x4 to 0x4000 (16 KiB). +\fBWARNING: Do not specify the identifier of an unknown log page. +Reading a log page may have undesirable side effects.\fP +.Sp +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.I ssd +\- [ATA] prints the Solid State Device Statistics log page. +This has the same effect as \*(Aq\-l devstat,7\*(Aq, see above. +.Sp +.I ssd +\- [SCSI] prints the Solid State Media percentage used endurance +indicator. A value of 0 indicates as new condition while 100 +indicates the device is at the end of its lifetime as projected by the +manufacturer. +The value may reach 255. +.Sp +.I farm +\- [Seagate ATA or SAS (SCSI) only: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +prints predictive drive health metrics and values from Seagate's +vendor-specific Field Access Reliability Metrics (FARM) log when used +on a drive supporting FARM. +ATA and SAS logs differ slightly. +\fBWARNING: Some Seagate drives do not support FARM.\fP +.TP +.B \-v ID,FORMAT[:BYTEORDER][,NAME], \-\-vendorattribute=ID,FORMAT... +[ATA only] Sets a vendor-specific raw value print FORMAT, an optional +BYTEORDER and an optional NAME for Attribute ID. +This option may be used multiple times. +.Sp +The Attribute ID can be in the range 1 to 255. +If \*(AqN\*(Aq is specified as ID, the settings for all Attributes are changed. +.Sp +The optional BYTEORDER consists of 1 to 8 characters from the +set \*(Aq012345rvwz\*(Aq. +The characters \*(Aq0\*(Aq to \*(Aq5\*(Aq select the byte 0 to 5 from the +48-bit raw value, \*(Aqr\*(Aq selects the reserved byte of the attribute +data block, \*(Aqv\*(Aq selects the normalized value, \*(Aqw\*(Aq selects +the worst value and \*(Aqz\*(Aq inserts a zero byte. +The default BYTEORDER is \*(Aq543210\*(Aq for all 48-bit formats, +\*(Aqr543210\*(Aq for the 54-bit formats, and \*(Aq543210wv\*(Aq for the +64-bit formats. +For example, \*(Aq\-v 5,raw48:012345\*(Aq prints the raw value of +attribute 5 with big endian instead of little endian +byte ordering. +.Sp +The NAME is a string of letters, digits and underscore. Its length should +not exceed 23 characters. +The \*(Aq\-P showall\*(Aq option reports an error if this is the case. +.Sp +.I \-v help +\- Prints (to STDOUT) a list of all valid arguments to this option, +then exits. +.Sp +Valid arguments for FORMAT are: +.Sp +.I raw8 +\- Print the Raw value as six 8-bit unsigned base-10 integers. +This may be useful for decoding the meaning of the Raw value. +.Sp +.I raw16 +\- Print the Raw value as three 16-bit unsigned base-10 integers. +This may be useful for decoding the meaning of the Raw value. +.Sp +.I raw48 +\- Print the Raw value as a 48-bit unsigned base-10 integer. +This is the default for most attributes. +.Sp +.I hex48 +\- Print the Raw value as a 12 digit hexadecimal number. +This may be useful for decoding the meaning of the Raw value. +.Sp +.I raw56 +\- Print the Raw value as a 54-bit unsigned base-10 integer. +This includes the reserved byte which follows the 48-bit raw value. +.Sp +.I hex56 +\- Print the Raw value as a 14 digit hexadecimal number. +This includes the reserved byte which follows the 48-bit raw value. +.Sp +.I raw64 +\- Print the Raw value as a 64-bit unsigned base-10 integer. +This includes two bytes from the normalized and worst attribute value. +This raw format is used by some SSD devices with Indilinx controller. +.Sp +.I hex64 +\- Print the Raw value as a 16 digit hexadecimal number. +This includes two bytes from the normalized and worst attribute value. +This raw format is used by some SSD devices with Indilinx controller. +.Sp +.I min2hour +\- Raw Attribute is power-on time in minutes. Its raw value +will be displayed in the form "Xh+Ym". Here X is hours, and Y is +minutes in the range 0\(en59 inclusive. Y is always printed with two +digits, for example "06" or "31" or "00". +.Sp +.I sec2hour +\- Raw Attribute is power-on time in seconds. Its raw value +will be displayed in the form "Xh+Ym+Zs". Here X is hours, Y is +minutes in the range 0\(en59 inclusive, and Z is seconds in the range +0\(en59 inclusive. Y and Z are always printed with two digits, for +example "06" or "31" or "00". +.Sp +.I halfmin2hour +\- Raw Attribute is power-on time, measured in units of 30 +seconds. This format is used by some Samsung disks. Its raw value +will be displayed in the form "Xh+Ym". Here X is hours, and Y is +minutes in the range 0\(en59 inclusive. Y is always printed with two +digits, for example "06" or "31" or "00". +.Sp +.I msec24hour32 +\- Raw Attribute is power-on time measured in 32-bit hours and 24-bit +milliseconds since last hour update. It will be displayed in the form +"Xh+Ym+Z.Ms". Here X is hours, Y is minutes, Z is seconds and M is +milliseconds. +.Sp +.I tempminmax +\- Raw Attribute is the disk temperature in Celsius. Info about +Min/Max temperature is printed if available. This is the default +for Attributes 190 and 194. The recording interval (lifetime, +last power cycle, last soft reset) of the min/max values is device +specific. +.Sp +.I temp10x +\- Raw Attribute is ten times the disk temperature in Celsius. +.Sp +.I raw16(raw16) +\- Print the raw attribute as a 16-bit value and two optional +16-bit values if these words are nonzero. This is the default +for Attributes 5 and 196. +.Sp +.I raw16(avg16) +\- Raw attribute is spin-up time. It is printed as a 16-bit value +and an optional "Average" 16-bit value if the word is nonzero. +This is the default for Attribute 3. +.Sp +.I raw24(raw8) +\- Print the raw attribute as a 24-bit value and three optional +8-bit values if these bytes are nonzero. This is the default +for Attribute 9. +.Sp +.I raw24/raw24 +\- Raw Attribute contains two 24-bit values. The first is the +number of load cycles. The second is the number of unload cycles. +The difference between these two values is the number of times that +the drive was unexpectedly powered off (also called an emergency +unload). As a rule of thumb, the mechanical stress created by one +emergency unload is equivalent to that created by one hundred normal +unloads. +.Sp +.I raw24/raw32 +\- Raw attribute is an error rate which consists of a 24-bit error +count and a 32-bit total count. +.Sp +The following old arguments to \*(Aq\-v\*(Aq are also still valid: +.Sp +.I 9,minutes +\- same as: +.I 9,min2hour,Power_On_Minutes. +.Sp +.I 9,seconds +\- same as: +.I 9,sec2hour,Power_On_Seconds. +.Sp +.I 9,halfminutes +\- same as: +.I 9,halfmin2hour,Power_On_Half_Minutes. +.Sp +.I 9,temp +\- same as: +.I 9,tempminmax,Temperature_Celsius. +.Sp +.I 192,emergencyretractcyclect +\- same as: +.I 192,raw48,Emerg_Retract_Cycle_Ct +.Sp +.I 193,loadunload +\- same as: +.I 193,raw24/raw24. +.Sp +.I 194,10xCelsius +\- same as: +.I 194,temp10x,Temperature_Celsius_x10. +.Sp +.I 194,unknown +\- same as: +.I 194,raw48,Unknown_Attribute. +.Sp +.I 197,increasing +\- same as: +.I 197,raw48,Total_Pending_Sectors. +Also means that Attribute number 197 (Current Pending Sector Count) +is not reset if uncorrectable sectors are reallocated +(see \fBsmartd.conf\fP(5) man page). +.Sp +.I 198,increasing +\- same as: +.I 198,raw48,Total_Offl_Uncorrectabl. +Also means that Attribute number 198 (Offline Uncorrectable Sector Count) +is not reset if uncorrectable sectors are reallocated +(see \fBsmartd.conf\fP(5) man page). +.Sp +.I 198,offlinescanuncsectorct +\- same as: +.I 198,raw48,Offline_Scan_UNC_SectCt. +.Sp +.I 200,writeerrorcount +\- same as: +.I 200,raw48,Write_Error_Count. +.Sp +.I 201,detectedtacount +\- same as: +.I 201,raw48,Detected_TA_Count. +.Sp +.I 220,temp +\- same as: +.I 220,tempminmax,Temperature_Celsius. +.TP +.B \-F TYPE, \-\-firmwarebug=TYPE +[ATA only] Modifies the behavior of \fBsmartctl\fP to compensate for some +known and understood device firmware or driver bug. This option may be used +multiple times. The valid arguments are: +.Sp +.I none +\- Assume that the device firmware obeys the ATA specifications. This +is the default, unless the device has presets for \*(Aq\-F\*(Aq in the +drive database. Using this option on the command line will override any +preset values. +.Sp +.I nologdir +\- Suppresses read attempts of SMART or GP Log Directory. +Support for all standard logs is assumed without an actual check. +Some Intel SSDs may freeze if log address 0 is read. +.Sp +.I samsung +\- In some Samsung disks (example: model SV4012H Firmware Version: +RM100-08) some of the two- and four-byte quantities in the SMART data +structures are byte-swapped (relative to the ATA specification). +Enabling this option tells \fBsmartctl\fP to evaluate these quantities +in byte-reversed order. Some signs that your disk needs this option +are (1) no self-test log printed, even though you have run self-tests; +(2) very large numbers of ATA errors reported in the ATA error log; +(3) strange and impossible values for the ATA error log timestamps. +.Sp +.I samsung2 +\- In some Samsung disks the number of ATA errors reported is byte swapped. +Enabling this option tells \fBsmartctl\fP to evaluate this quantity in +byte-reversed order. An indication that your Samsung disk needs this +option is that the self-test log is printed correctly, but there are a +very large number of errors in the SMART error log. This is because +the error count is byte swapped. Thus a disk with five errors +(0x0005) will appear to have 20480 errors (0x5000). +.Sp +.I samsung3 +\- Some Samsung disks (at least SP2514N with Firmware VF100-37) report +a self-test still in progress with 0% remaining when the test was already +completed. Enabling this option modifies the output of the self-test +execution status (see options \*(Aq\-c\*(Aq or \*(Aq\-a\*(Aq above) +accordingly. +.Sp +.I xerrorlba +\- Fixes LBA byte ordering in Extended Comprehensive SMART error log. +Some disks use little endian byte ordering instead of ATA register +ordering to specify the LBA addresses in the log entries. +.Sp +.I swapid +\- Fixes byte swapped ATA identify strings (device name, serial number, +firmware version) returned by some buggy device drivers. +.TP +.B \-P TYPE, \-\-presets=TYPE +[ATA only] Specifies whether \fBsmartctl\fP should use any preset options +that are available for this drive. By default, if the drive is recognized +in the \fBsmartmontools\fP database, then the presets are used. +.Sp +The argument +.I show +will show any preset options for your drive and the argument +.I showall +will show all known drives in the \fBsmartmontools\fP database, along +with their preset options. If there are no presets for your drive and +you think there should be (for example, a \-v or \-F option is needed +to get \fBsmartctl\fP to display correct values) then please contact +the \fBsmartmontools\fP developers so that this information can be +added to the \fBsmartmontools\fP database. Contact information is at the +end of this man page. +.Sp +The valid arguments to this option are: +.Sp +.I use +\- if a drive is recognized, then use the stored presets for it. This +is the default. Note that presets will NOT override additional +Attribute interpretation (\*(Aq\-v N,something\*(Aq) command-line options or +explicit \*(Aq\-F\*(Aq command-line options.. +.Sp +.I ignore +\- do not use presets. +.Sp +.I show +\- show if the drive is recognized in the database, and if so, its +presets, then exit. +.Sp +.I showall +\- list all recognized drives, and the presets that are set for them, +then exit. This also checks the drive database regular expressions +and settings for syntax errors. +.Sp +The \*(Aq\-P showall\*(Aq option takes up to two optional arguments to +match a specific drive type and firmware version. +The command: +.Vb 1 + smartctl \-P showall +.Ve +lists all entries, the command: +.Vb 1 + smartctl \-P showall \*(AqMODEL\*(Aq +.Ve +lists all entries matching MODEL, and the command: +.Vb 1 + smartctl \-P showall \*(AqMODEL\*(Aq \*(AqFIRMWARE\*(Aq +.Ve +lists all entries for this MODEL and a specific FIRMWARE version. +.TP +.B \-B [+]FILE, \-\-drivedb=[+]FILE +[ATA only] Read the drive database from FILE. The new database replaces +the built in database by default. If \*(Aq+\*(Aq is specified, then the new +entries prepend the built in entries. +.Sp +Optional entries are read from the file +.\" %IF NOT OS Windows +\fB/usr/local/etc/smart_drivedb.h\fP +.\" %ENDIF NOT OS Windows +.\" %IF OS ALL +(Windows: \fBEXEDIR/drivedb-add.h\fP) +.\" %ENDIF OS ALL +.\" %IF OS Windows +.\"! \fBEXEDIR/drivedb-add.h\fP +.\" %ENDIF OS Windows +.\" %IF ENABLE_DRIVEDB +if this option is not specified. +.Sp +If +.\" %IF NOT OS Windows +\fB/usr/local/var/lib/smartmontools/drivedb.h\fP +.\" %ENDIF NOT OS Windows +.\" %IF OS ALL +(Windows: \fBEXEDIR/drivedb.h\fP) +.\" %ENDIF OS ALL +.\" %IF OS Windows +.\"! \fBEXEDIR/drivedb.h\fP +.\" %ENDIF OS Windows +is present, the contents of this file is used instead of the built in table. +.\" %IF ENABLE_UPDATE_SMART_DRIVEDB +.Sp +Run +.\" %IF NOT OS Windows +\fB/usr/local/sbin/update-smart-drivedb\fP +.\" %ENDIF NOT OS Windows +.\" %IF OS ALL +(Windows: \fBEXEDIR/update-smart-drivedb.exe\fP) +.\" %ENDIF OS ALL +.\" %IF OS Windows +.\"! \fBEXEDIR/update-smart-drivedb.exe\fP +.\" %ENDIF OS Windows +to update this file from the smartmontools SVN repository. +.\" %ENDIF ENABLE_UPDATE_SMART_DRIVEDB +.\" %ENDIF ENABLE_DRIVEDB +.Sp +The database files use the same C/C++ syntax that is used to initialize +the built in database array. +C/C++ style comments are allowed. +Example: +.Sp +.Vb 8 + /* Full entry: */ + { + "Model family", // Info about model family/series. + "MODEL1.*REGEX", // Regular expression to match model of device. + "VERSION.*REGEX", // Regular expression to match firmware version(s). + "Some warning", // Warning message. + "\-v 9,minutes" // String of preset \-v and \-F options. + }, + /* Minimal entry: */ + { + "", // No model family/series info. + "MODEL2.*REGEX", // Regular expression to match model of device. + "", // All firmware versions. + "", // No warning. + "" // No options preset. + }, + /* USB ID entry: */ + { + "USB: Device; Bridge", // Info about USB device and bridge name. + "0x1234:0xabcd", // Regular expression to match vendor:product ID. + "0x0101", // Regular expression to match bcdDevice. + "", // Not used. + "\-d sat" // String with device type option. + }, + /* ... */ +.Ve +.Sp +.TP +.B SMART RUN/ABORT OFFLINE TEST AND self-test OPTIONS: +.TP +.B \-t TEST, \-\-test=TEST +Executes TEST immediately. The \*(Aq\-C\*(Aq option can be used in +conjunction with this option to run the short or long (and also for +ATA devices, selective or conveyance) self-tests in captive mode +(known as "foreground mode" for SCSI devices). Note that only one +test type can be run at a time, so only one test type should be +specified per command line. Note also that if a computer is shutdown +or power cycled during a self-test, no harm should result. The +self-test will either be aborted or will resume automatically. +.Sp +All \*(Aq\-t TEST\*(Aq commands can be given during normal system operation +unless captive mode (\*(Aq\-C\*(Aq option) is used. +A running self-test can, however, degrade performance of the drive. +Frequent I/O requests from the operating system increase the duration +of a test. These impacts may vary from device to device. +.Sp +If a test failure occurs then the device may discontinue the testing +and report the result immediately. +.Sp +[ATA] +Note that the ATA command SMART EXECUTE OFF-LINE IMMEDIATE (the command to +start a test) was declared obsolete in ATA ACS-4 Revision 10 (Nov 2015). +.Sp +The valid arguments to this option are: +.Sp +.I offline +\- [ATA] runs SMART Immediate Offline Test. This immediately +starts the test described above. This command can be given during +normal system operation. The effects of this test are visible only in +that it updates the SMART Attribute values, and if errors are +found they will appear in the SMART error log, visible with the +\*(Aq\-l error\*(Aq option. +.Sp +If the \*(Aq\-c\*(Aq option to \fBsmartctl\fP shows that the device has the +"Suspend Offline collection upon new command" capability then you can +track the progress of the Immediate Offline test using the \*(Aq\-c\*(Aq +option to \fBsmartctl\fP. If the \*(Aq\-c\*(Aq option show that the device +has the "Abort Offline collection upon new command" capability then +most commands will abort the Immediate Offline Test, so you should not +try to track the progress of the test with \*(Aq\-c\*(Aq, as it will abort +the test. +.Sp +.I offline +\- [SCSI] runs the default self test in foreground. +No entry is placed in the self test log. +.Sp +.I short +\- [ATA] runs SMART Short Self Test (usually under ten minutes). +This command can be given during normal system operation (unless run in +captive mode \- see the \*(Aq\-C\*(Aq option below). This is a +test in a different category than the immediate or automatic offline +tests. The "Self" tests check the electrical and mechanical +performance as well as the read performance of the disk. Their +results are reported in the Self Test Error Log, readable with +the \*(Aq\-l selftest\*(Aq option. Note that on some disks the progress of +the self-test can be monitored by watching this log during the self-test; +with other disks use the \*(Aq\-c\*(Aq option to monitor progress. +.Sp +.I short +\- [SCSI] runs the "Background short" self-test. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I short +\- [NVMe: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +runs the "Short" self-test for current namespace. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I long +\- [ATA] runs SMART Extended Self Test (tens of minutes to several hours). +This is a longer and more thorough version of the Short Self Test described +above. Note that this command can be given during normal +system operation (unless run in captive mode \- see the \*(Aq\-C\*(Aq option +below). +.Sp +.I long +\- [SCSI] runs the "Background long" self-test. +.\" %IF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I long +\- [NVMe: NEW EXPERIMENTAL SMARTCTL 7.4 FEATURE] +runs the "Extended" self-test for current namespace. +.\" %ENDIF OS Darwin FreeBSD Linux NetBSD Windows Cygwin +.Sp +.I conveyance +\- [ATA only] runs a SMART Conveyance Self Test (minutes). This +self-test routine is intended to identify damage incurred during +transporting of the device. This self-test routine should take on the +order of minutes to complete. Note that this command can be given +during normal system operation (unless run in captive mode \- see the +\*(Aq\-C\*(Aq option below). +.Sp +.I select,N\-M, select,N+SIZE +\- [ATA only] runs a SMART Selective Self Test, to test a \fBrange\fP +of disk Logical Block Addresses (LBAs), rather than the entire disk. +Each range of LBAs that is checked is called a "span" and is specified +by a starting LBA (N) and an ending LBA (M) with N less than or equal +to M. +The range can also be specified as N+SIZE. +A span at the end of a disk can be specified by N\-\fBmax\fP. +.Sp +For example the commands: +.Vb 2 + smartctl \-t select,10\-20 /dev/sda + smartctl \-t select,10+11 /dev/sda +.Ve +both runs a self test on one span consisting of LBAs ten to twenty +(inclusive). +The command: +.Vb 1 + smartctl \-t select,100000000\-max /dev/sda +.Ve +run a self test from LBA 100000000 up to the end of the disk. +The \*(Aq\-t\*(Aq option can be given up to five times, to test +up to five spans. For example the command: +.Vb 1 + smartctl \-t select,0\-100 \-t select,1000\-2000 /dev/sda +.Ve +runs a self test on two spans. The first span consists of 101 LBAs +and the second span consists of 1001 LBAs. Note that the spans can +overlap partially or completely, for example: +.Vb 1 + smartctl \-t select,0\-10 \-t select,5\-15 \-t select,10\-20 /dev/sda +.Ve +The results of the selective self-test can be obtained (both during +and after the test) by printing the SMART self-test log, using the +\*(Aq\-l selftest\*(Aq option to smartctl. +.Sp +Selective self tests are particularly useful as disk capacities +increase: an extended self test (smartctl \-t long) can take several +hours. Selective self-tests are helpful if (based on SYSLOG error +messages, previous failed self-tests, or SMART error log entries) you +suspect that a disk is having problems at a particular range of +Logical Block Addresses (LBAs). +.Sp +Selective self-tests can be run during normal system operation (unless +done in captive mode \- see the \*(Aq\-C\*(Aq option below). +.Sp +The following variants of the selective self-test command use spans based +on the ranges from past tests already stored on the disk: +.Sp +.I select,redo[+SIZE] +\- [ATA only] redo the last SMART Selective Self Test using the same LBA +range. +The starting LBA is identical to the LBA used by last test, same for ending +LBA unless a new span size is specified by optional +SIZE argument. +.Sp +For example the commands: +.Vb 3 + smartctl \-t select,10\-20 /dev/sda + smartctl \-t select,redo /dev/sda + smartctl \-t select,redo+20 /dev/sda +.Ve +have the same effect as: +.Vb 3 + smartctl \-t select,10\-20 /dev/sda + smartctl \-t select,10\-20 /dev/sda + smartctl \-t select,10\-29 /dev/sda +.Ve +.Sp +.I select,next[+SIZE] +\- [ATA only] runs a SMART Selective Self Test on the LBA range which +follows the range of the last test. +The starting LBA is set to (ending LBA +1) of the last test. +A new span size may be specified by the optional +SIZE argument. +.Sp +For example the commands: +.Vb 3 + smartctl \-t select,0\-999 /dev/sda + smartctl \-t select,next /dev/sda + smartctl \-t select,next+2000 /dev/sda +.Ve +have the same effect as: +.Vb 3 + smartctl \-t select,0\-999 /dev/sda + smartctl \-t select,1000\-1999 /dev/sda + smartctl \-t select,2000\-3999 /dev/sda +.Ve +.Sp +If the last test ended at the last LBA of the disk, the new range starts +at LBA 0. The span size of the last span of a disk is adjusted such that +the total number of spans to check the full disk will not be changed +by future uses of \*(Aq\-t select,next\*(Aq. +.Sp +.I select,cont[+SIZE] +\- [ATA only] performs a \*(Aqredo\*(Aq (above) if the self test status +reports that the last test was aborted by the host. +Otherwise it run the \*(Aqnext\*(Aq (above) test. +.Sp +.I afterselect,on +\- [ATA only] perform an offline read scan after a Selective self-test +has completed. This option must be used together with one or more of +the \fIselect,N\-M\fP options above. If the LBAs that have been +specified in the Selective self-test pass the test with no errors +found, then read scan the \fBremainder\fP of the disk. If the device +is powered-cycled while this read scan is in progress, the read scan +will be automatically resumed after a time specified by the pending +timer (see below). The value of this option is preserved between +selective self-tests. +.Sp +.I afterselect,off +\- [ATA only] do not read scan the remainder of the disk after a +Selective self-test has completed. This option must be use together +with one or more of the \fIselect,N\-M\fP options above. The value of this +option is preserved between selective self-tests. +.Sp +.I pending,N +\- [ATA only] set the pending offline read scan timer to N minutes. +Here N is an integer in the range from 0 to 65535 inclusive. If the +device is powered off during a read scan after a Selective self-test, +then resume the test automatically N minutes after power-up. This +option must be use together with one or more of the \fIselect,N\-M\fP +options above. +The value of this option is preserved between selective self-tests. +.Sp +.I vendor,N +\- [ATA only] issues the ATA command SMART EXECUTE OFF-LINE IMMEDIATE +with subcommand N in LBA LOW register. The subcommand is specified as +a hex value in the range 0x00 to 0xff. Subcommands 0x40\(en0x7e and +0x90\(en0xff are reserved for vendor specific use, see table 61 of +T13/1699-D Revision 6a (ATA8-ACS). Note that the subcommands +0x00\(en0x04, 0x7f, 0x81\(en0x84 are supported by other smartctl options +(e.g.\& 0x01: \*(Aq\-t short\*(Aq, 0x7f: \*(Aq\-X\*(Aq, 0x82: +\*(Aq\-C \-t long\*(Aq). +.Sp +\fBWARNING: Only run subcommands documented by the vendor of the +device.\fP +.Sp +Example for some Intel SSDs only: +The subcommand 0x40 (\*(Aq\-t vendor,0x40\*(Aq) clears the timed workload +related SMART attributes (226, 227, 228). Note that the raw values of +these attributes are held at 65535 (0xffff) until the workload timer +reaches 60 minutes. +.Sp +.I force +\- start new self-test even if another test is already running. +By default a running self-test will not be interrupted to begin another +test. +.TP +.B \-C, \-\-captive +[ATA] Runs self-tests in captive mode. This has no effect with \*(Aq\-t +offline\*(Aq or if the \*(Aq\-t\*(Aq option is not used. +.Sp +\fBWARNING: Tests run in captive mode may busy out the drive for the +length of the test. Only run captive tests on drives without any +mounted partitions!\fP +.Sp +[SCSI] Runs the self-test in "Foreground" mode. +.TP +.B \-X, \-\-abort +Aborts non-captive SMART Self Tests. Note that this +command will abort the Offline Immediate Test routine only if your +disk has the "Abort Offline collection upon new command" capability. +.Sp +.SH ATA, SCSI command sets and SAT +In the past there has been a clear distinction between storage devices +that used the ATA and SCSI command sets. This distinction was often +reflected in their device naming and hardware. Now various SCSI +transports (e.g.\& SAS, FC and iSCSI) can interconnect to both SCSI +disks (e.g.\& FC and SAS) and ATA disks (especially SATA). USB and +IEEE 1394 storage devices use the SCSI command set externally but +almost always contain ATA or SATA disks (or flash). The storage +subsystems in some operating systems have started to remove the +distinction between ATA and SCSI in their device naming policies. +.PP +99% of operations that an OS performs on a disk involve the SCSI INQUIRY, +READ CAPACITY, READ and WRITE commands, or their ATA equivalents. Since +the SCSI commands are slightly more general than their ATA equivalents, +many OSes are generating SCSI commands (mainly READ and WRITE) and +letting a lower level translate them to their ATA equivalents as the +need arises. An important note here is that "lower level" may be in +external equipment and hence outside the control of an OS. +.PP +SCSI to ATA Translation (SAT) is a standard (ANSI INCITS 431-2007) that +specifies how this translation is done. For the other 1% of operations +that an OS performs on a disk, SAT provides two options. First is an +optional ATA PASS-THROUGH SCSI command (there are two variants). +The second is a translation from the closest SCSI command. +Most current interest is in the "pass-through" option. +.PP +The relevance to smartmontools (and hence smartctl) is that its +interactions with disks fall solidly into the "1%" category. So even +if the OS can happily treat (and name) a disk as "SCSI", smartmontools +needs to detect the native command set and act accordingly. +As more storage manufacturers (including external SATA drives) comply +with SAT, smartmontools is able to automatically distinguish the native +command set of the device. +In some cases the \*(Aq\-d sat\*(Aq option is needed on the command line. +.PP +There are also virtual disks which typically have no useful information +to convey to smartmontools, but could conceivably in the future. An +example of a virtual disk is the OS's view of a RAID 1 box. There are +most likely two SATA disks inside a RAID 1 box. Addressing those SATA +disks from a distant OS is a challenge for smartmontools. Another +approach is running a tool like smartmontools inside the RAID 1 box (e.g. +a Network Attached Storage (NAS) box) and fetching the logs via a +browser. +.Sp +.SH TAPE DRIVES +Commands for SCSI Tape drives as defined in the SSC\-4 standard (ANSI +INCITS 516\-2013). SSC stands for "SCSI Streaming Commands". Draft +standards can be found at <\fBhttps://www.t10.org/\fP> . +.PP +Many SMART related features of SCSI disks are shared by SCSI tape drives. +One important tape\-specific log page is called "TapeAlert" which is used +to report abnormal conditions. Unlike most other log pages the TapeAlert +log page +.B clears +pending alerts after that page is fetched (i.e. read from +the tape drive). To be more precise, the TapeAlert log page is cleared +for the I_T nexus (initiator-target pair) that sent the (SCSI LOG SENSE) +command; so another initiator (e.g. a HBA on another machine) will still +have pending alerts reported. [This clearing action can be controlled by +the TAPLSD bit is the [SSC] Device Configuration Extension mode page but +the original and default action remains: clear any pending TapeAlerts. +The sdparm utility can be used to access and change TAPLSD.] +.PP +Previous versions of smartctl have supported polling the TapeAlert log +page when the \-\-health option is given. This clearing of pending alerts +has created problems for other tape\-specific tools. This version of +smartctl will only fetch the TapeAlert log page if the \-\-health option +is given +.B twice +in the command line invocation (or the \-\-log=tapealert option is given). +.PP +There are other tape\-specific log pages such as \-\-log=tapedevstat +that behave normally (i.e. they don't change any state information in +the tape drive). +.Sp +.SH EXAMPLES +.B smartctl \-a /dev/sda +.br +Print a large amount of SMART information for drive /dev/sda. +.PP +.B smartctl \-s off /dev/sdd +.br +Disable SMART monitoring and data log collection on drive /dev/sdd. +.PP +.B smartctl \-\-smart=on \-\-offlineauto=on \-\-saveauto=on /dev/sda +.br +Enable SMART on drive /dev/sda, enable automatic offline +testing every four hours, and enable autosaving of +SMART Attributes. This is a good start-up line for your system's +init files. You can issue this command on a running system. +.PP +.B smartctl \-t long /dev/sdc +.br +Begin an extended self-test of drive /dev/sdc. You can issue this +command on a running system. The results can be seen in the self-test +log visible with the \*(Aq\-l selftest\*(Aq option after it has completed. +.PP +.B smartctl \-s on \-t offline /dev/sda +.br +Enable SMART on the disk, and begin an immediate offline test of +drive /dev/sda. You can issue this command on a running system. The +results are only used to update the SMART Attributes, visible +with the \*(Aq\-A\*(Aq option. If any device errors occur, they are logged to +the SMART error log, which can be seen with the \*(Aq\-l error\*(Aq option. +.PP +.B smartctl \-A \-v 9,minutes /dev/sda +.br +Shows the vendor Attributes, when the disk stores its power-on time +internally in minutes rather than hours. +.PP +.B smartctl \-q errorsonly \-H \-l selftest /dev/sda +.br +Produces output only if the device returns failing SMART status, +or if some of the logged self-tests ended with errors. +.PP +.B smartctl \-q silent \-a /dev/sda +.br +Examine all SMART data for device /dev/sda, but produce no +printed output. You must use the exit status (the +.B $? +shell variable) to learn if any Attributes are out of bound, if the +SMART status is failing, if there are errors recorded in the +self-test log, or if there are errors recorded in the disk error log. +.PP +.B smartctl \-a \-d 3ware,0 /dev/twl0 +.br +Examine all SMART data for the first SATA (not SAS) disk connected to a +3ware RAID 9750 controller card. +.PP +.B smartctl \-t long \-d areca,4 /dev/sg2 +.br +Start a long self-test on the fourth SATA disk connected to an Areca RAID +controller addressed by /dev/sg2. +.PP +.B smartctl \-a \-d hpt,1/3 /dev/sda (under Linux) +.br +.B smartctl \-a \-d hpt,1/3 /dev/hptrr (under FreeBSD) +.br +Examine all SMART data for the (S)ATA disk directly connected to the third +channel of the first HighPoint RocketRAID controller card. +.PP +.B smartctl \-t short \-d hpt,1/1/2 /dev/sda (under Linux) +.br +.B smartctl \-t short \-d hpt,1/1/2 /dev/hptrr (under FreeBSD) +.br +Start a short self-test on the (S)ATA disk connected to second pmport on the +first channel of the first HighPoint RocketRAID controller card. +.PP +.B smartctl \-t select,10\-100 \-t select,30\-300 \-t afterselect,on \-t pending,45 /dev/sda +.br +Run a selective self-test on LBAs 10 to 100 and 30 to 300. After the +these LBAs have been tested, read-scan the remainder of the disk. +If the disk is power-cycled during the read-scan, resume the scan 45 minutes +after power to the device is restored. +.PP +.B smartctl \-a \-d cciss,0 /dev/cciss/c0d0 +.br +Examine all SMART data for the first SCSI disk connected to a cciss +RAID controller card. +.Sp +.SH EXIT STATUS +The exit statuses of \fBsmartctl\fP are defined by a bitmask. +If all is well with the disk, the exit status (return value) of +\fBsmartctl\fP is 0 (all bits turned off). If a problem occurs, or an +error, potential error, or fault is detected, then a non-zero status +is returned. In this case, the eight different bits in the exit status +have the following meanings for ATA disks; some of these values +may also be returned for SCSI disks. +.TP +.B Bit 0: +Command line did not parse. +.TP +.B Bit 1: +Device open failed, device did not return an IDENTIFY DEVICE structure, +or device is in a low-power mode (see \*(Aq\-n\*(Aq option above). +.TP +.B Bit 2: +Some SMART or other ATA command to the disk failed, or there was a checksum +error in a SMART data structure (see \*(Aq\-b\*(Aq option above). +.TP +.B Bit 3: +SMART status check returned "DISK FAILING". +.TP +.B Bit 4: +We found prefail Attributes <= threshold. +.TP +.B Bit 5: +SMART status check returned "DISK OK" but we found that some (usage +or prefail) Attributes have been <= threshold at some time in the +past. +.TP +.B Bit 6: +The device error log contains records of errors. +.TP +.B Bit 7: +The device self-test log contains records of errors. +[ATA only] Failed self-tests outdated by a newer successful extended +self-test are ignored. +.PP +To test within the shell for whether or not the different bits are +turned on or off, you can use the following type of construction +(which should work with any POSIX compatible shell): +.br +.B smartstat=$(($? & 8)) +.br +This looks at only at bit 3 of the exit status +.B $? +(since 8=2^3). The shell variable +$smartstat will be nonzero if SMART status check returned "disk +failing" and zero otherwise. +.PP +This shell script prints all status bits: +.Vb 5 +val=$?; mask=1 +for i in 0 1 2 3 4 5 6 7; do + echo "Bit $i: $(((val & mask) && 1))" + mask=$((mask << 1)) +done +.Ve +.Sp +.\" %IF NOT OS Windows +.SH FILES +.TP +.B /usr/local/sbin/smartctl +full path of this executable. +.\" %IF ENABLE_DRIVEDB +.TP +.B /usr/local/var/lib/smartmontools/drivedb.h +drive database (see \*(Aq\-B\*(Aq option). +.\" %ENDIF ENABLE_DRIVEDB +.TP +.B /usr/local/etc/smart_drivedb.h +optional local drive database (see \*(Aq\-B\*(Aq option). +.Sp +.\" %ENDIF NOT OS Windows +.SH AUTHORS +\fBBruce Allen\fP (project initiator), +.br +\fBChristian Franke\fP (project manager, Windows port and all sort of things), +.br +\fBDouglas Gilbert\fP (SCSI subsystem), +.br +\fBVolker Kuhlmann\fP (moderator of support and database mailing list), +.br +\fBGabriele Pohl\fP (wiki & development team support), +.br +\fBAlex Samorukov\fP (FreeBSD port and more, new Trac wiki). +.PP +Many other individuals have made contributions and corrections, +see AUTHORS, ChangeLog and repository files. +.PP +The first smartmontools code was derived from the smartsuite package, +written by Michael Cornwell and Andre Hedrick. +.Sp +.SH REPORTING BUGS +To submit a bug report, create a ticket in smartmontools wiki: +.br +<\fBhttps://www.smartmontools.org/\fP>. +.br +Alternatively send the info to the smartmontools support mailing list: +.br +<\fBhttps://listi.jpberlin.de/mailman/listinfo/smartmontools-support\fB>. +.Sp +.SH SEE ALSO +\fBsmartd\fP(8). +.\" %IF ENABLE_UPDATE_SMART_DRIVEDB +.br +\fBupdate-smart-drivedb\fP(8). +.\" %ENDIF ENABLE_UPDATE_SMART_DRIVEDB +.Sp +.SH REFERENCES +Please see the following web site for more info: +<\fBhttps://www.smartmontools.org/\fP> +.PP +An introductory article about smartmontools is \fIMonitoring Hard +Disks with SMART\fP, by Bruce Allen, Linux Journal, January 2004, +pages 74\(en77. +See <\fBhttps://www.linuxjournal.com/article/6983\fP>. +.PP +If you would like to understand better how SMART works, and what it +does, a good place to start is with Sections 4.8 and 6.54 of the first +volume of the \*(AqAT Attachment with Packet Interface-7\*(Aq (ATA/ATAPI-7) +specification Revision 4b. This documents the SMART functionality which the +\fBsmartmontools\fP utilities provide access to. +.PP +The functioning of SMART was originally defined by the SFF-8035i +revision 2 and the SFF-8055i revision 1.4 specifications. These are +publications of the Small Form Factors (SFF) Committee. +.PP +Links to these and other documents may be found on the Links page of the +\fBsmartmontools\fP Wiki at <\fBhttps://www.smartmontools.org/wiki/Links\fP>. +.Sp +.SH PACKAGE VERSION +CURRENT_SVN_VERSION CURRENT_SVN_DATE CURRENT_SVN_REV +.br +$Id: smartctl.8.in 5521 2023-07-24 16:44:49Z chrfranke $ |