'\" t
.\"     Title: nvme-write-zeroes
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 08/05/2024
.\"    Manual: NVMe Manual
.\"    Source: NVMe
.\"  Language: English
.\"
.TH "NVME\-WRITE\-ZEROES" "1" "08/05/2024" "NVMe" "NVMe Manual"
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.SH "NAME"
nvme-write-zeroes \- Send an NVMe write zeroes command, return results
.SH "SYNOPSIS"
.sp
.nf
\fInvme\-write\-zeroes\fR <device> [\-\-start\-block=<slba> | \-s <slba>]
                        [\-\-block\-count=<nlb> | \-c <nlb>]
                        [\-\-ref\-tag=<reftag> | \-r <reftag>]
                        [\-\-prinfo=<prinfo> | \-p <prinfo>]
                        [\-\-app\-tag\-mask=<appmask> | \-m <appmask>]
                        [\-\-app\-tag=<apptag> | \-a <apptag>] [\-\-deac | \-d]
                        [\-\-limited\-retry | \-l] [\-\-force\-unit\-access | \-f]
                        [\-\-namespace\-id=<nsid> | \-n <nsid>]
                        [\-\-storage\-tag<storage\-tag> | \-S <storage\-tag>]
                        [\-\-storage\-tag\-check<storage\-tag\-check> | \-C <storage\-tag\-check>]
                        [\-\-dir\-type=<dtype> | \-T <dtype>]
                        [\-\-dir\-spec=<dspec> | \-D <dspec>]
                        [\-\-output\-format=<fmt> | \-o <fmt>] [\-\-verbose | \-v]
                        [\-\-timeout=<timeout> | \-t <timeout>]
.fi
.SH "DESCRIPTION"
.sp
The Write Zeroes command is used to set a range of logical blocks to 0\&.
.SH "OPTIONS"
.PP
\-s <slba>, \-\-start\-block=<slba>
.RS 4
Start block\&.
.RE
.PP
\-c <nlb>, \-\-block\-count=<nlb>
.RS 4
Number of logical blocks to write zeroes\&.
.RE
.PP
\-p <prinfo>, \-\-prinfo=<prinfo>
.RS 4
Protection Information field definition\&.
.TS
allbox tab(:);
lt lt
lt lt
lt lt
lt lt
lt lt
lt lt.
T{
Bit
T}:T{
Description
T}
T{
3
T}:T{
PRACT: Protection Information Action\&. When set to 1, PI is stripped/inserted on read/write when the block format\(cqs metadata size is 8\&. When set to 0, metadata is passes\&.
T}
T{
2:0
T}:T{
PRCHK: Protection Information Check:
T}
T{
2
T}:T{
Set to 1 enables checking the guard tag
T}
T{
1
T}:T{
Set to 1 enables checking the application tag
T}
T{
0
T}:T{
Set to 1 enables checking the reference tag
T}
.TE
.sp 1
.RE
.PP
\-r <reftag>, \-\-ref\-tag=<reftag>
.RS 4
Optional reftag when used with protection information\&.
.RE
.PP
\-m <appmask>, \-\-app\-tag\-mask=<appmask>
.RS 4
Optional application tag mask when used with protection information\&.
.RE
.PP
\-a <apptag>, \-\-app\-tag=<apptag>
.RS 4
Optional application tag when used with protection information\&.
.RE
.PP
\-l, \-\-limited\-retry
.RS 4
Sets the limited retry flag\&.
.RE
.PP
\-d, \-\-deac
.RS 4
Sets the DEAC bit, requesting controller deallocate the logical blocks\&.
.RE
.PP
\-f, \-\-force\-unit\-access
.RS 4
Set the force\-unit access flag\&.
.RE
.PP
\-n <nsid>, \-\-namespace\-id=<nsid>
.RS 4
Namespace ID use in the command\&.
.RE
.PP
\-S <storage\-tag>, \-\-storage\-tag=<storage\-tag>
.RS 4
Variable Sized Logical Block Storage Tag(LBST)\&.
.RE
.PP
\-C <storage\-tag\-check>, \-\-storage\-tag\-check=<storage\-tag\-check>
.RS 4
This bit specifies the Storage Tag field shall be checked as part of end\-to\-end data protection processing\&.
.RE
.PP
\-T <dtype>, \-\-dir\-type=<dtype>
.RS 4
Directive type
.RE
.PP
\-D <dspec>, \-\-dir\-spec=<dspec>
.RS 4
Directive specific
.RE
.PP
\-o <fmt>, \-\-output\-format=<fmt>
.RS 4
Set the reporting format to
\fInormal\fR,
\fIjson\fR
or
\fIbinary\fR\&. Only one output format can be used at a time\&.
.RE
.PP
\-v, \-\-verbose
.RS 4
Increase the information detail in the output\&.
.RE
.PP
\-t <timeout>, \-\-timeout=<timeout>
.RS 4
Override default timeout value\&. In milliseconds\&.
.RE
.SH "EXAMPLES"
.sp
No examples yet\&.
.SH "NVME"
.sp
Part of the nvme\-user suite