'\" t
.\"     Title: nvme-wdc-cap-diag
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 03/31/2023
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-WDC\-CAP\-DIAG" "1" "03/31/2023" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-wdc-cap-diag \- Retrieve WDC device\*(Aqs diagnostic log and save to file\&.
.SH "SYNOPSIS"
.sp
.nf
\fInvme wdc cap\-diag\fR <device> [\-\-output\-file=<FILE>, \-o <FILE>] [\-\-transfer\-size=<SIZE>, \-s <SIZE>]
.fi
.SH "DESCRIPTION"
.sp
For the NVMe device given, sends the WDC Vendor Unique Capture\-Diagnostics request and saves the result to a file\&.
.sp
The <device> parameter is mandatory NVMe character device (ex: /dev/nvme0)\&.
.sp
This will only work on WDC devices supporting this feature\&. Results for any other device are undefined\&.
.SH "OPTIONS"
.PP
\-o <FILE>, \-\-output\-file=<FILE>
.RS 4
Output file; defaults to device serial number followed by "cap_diag" suffix
.RE
.PP
\-s <SIZE>, \-\-transfer\-size=<SIZE>
.RS 4
Transfer size; defaults to 0x10000 (65536 decimal) bytes
.RE
.SH "EXAMPLES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Gets the capture diagnostics log from the device and saves to default file in current directory (e\&.g\&. STM00019F3F9cap_diag\&.bin):
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc cap\-diag /dev/nvme0
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Gets the capture diagnostics log from the device and saves to defined file in current directory (e\&.g\&. testSTM00019F3F9cap_diag\&.bin):
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc cap\-diag /dev/nvme0 \-o test
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Gets the capture diagnostics log from the device and saves to defined file with pathname (e\&.g\&. /tmp/testSTM00019F3F9cap_diag\&.bin):
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc cap\-diag /dev/nvme0 \-o /tmp/test
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Gets the capture diagnostics log from the device transferring the data in 64k chunks and saves to default file in current directory (e\&.g\&. STM00019F3F9internal_fw_log\&.bin):
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc cap\-diag /dev/nvme0 \-s 0x10000
.fi
.if n \{\
.RE
.\}
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
Gets the capture diagnostics log from the device transferring the data in 16k chunks and saves to default file in current directory (e\&.g\&. STM00019F3F9internal_fw_log\&.bin):
.sp
.if n \{\
.RS 4
.\}
.nf
# nvme wdc cap\-diag /dev/nvme0 \-s 16384
.fi
.if n \{\
.RE
.\}
.RE
.SH "NVME"
.sp
Part of the nvme\-user suite\&.