nvme-write-zeroes - Man Page

nvme-write-zeroes <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>] [--namespace-zeroes | -Z]
                        [--output-format=<fmt> | -o <fmt>] [--verbose | -v]
                        [--timeout=<timeout> | -t <timeout>]

The Write Zeroes command is used to set a range of logical blocks to 0​.

-s <slba>, --start-block=<slba>

Start block​.

-c <nlb>, --block-count=<nlb>

Number of logical blocks to write zeroes​.

-p <prinfo>, --prinfo=<prinfo>

Protection Information field definition​.

Bit	Description
3	PRACT: Protection Information Action​. When set to 1, PI is stripped/inserted on read/write when the block format’s metadata size is 8​. When set to 0, metadata is passes​.
2:0	PRCHK: Protection Information Check:
2	Set to 1 enables checking the guard tag
1	Set to 1 enables checking the application tag
0	Set to 1 enables checking the reference tag

-r <reftag>, --ref-tag=<reftag>

Optional reftag when used with protection information​.

-m <appmask>, --app-tag-mask=<appmask>

Optional application tag mask when used with protection information​.

-a <apptag>, --app-tag=<apptag>

Optional application tag when used with protection information​.

-l,  --limited-retry

Sets the limited retry flag​.

-d,  --deac

Sets the DEAC bit, requesting controller deallocate the logical blocks​.

-f,  --force-unit-access

Set the force-unit access flag​.

-n <nsid>, --namespace-id=<nsid>

Namespace ID use in the command​.

-S <storage-tag>, --storage-tag=<storage-tag>

Variable Sized Logical Block Storage Tag(LBST)​.

-C <storage-tag-check>, --storage-tag-check=<storage-tag-check>

This bit specifies the Storage Tag field shall be checked as part of end-to-end data protection processing​.

-T <dtype>, --dir-type=<dtype>

Directive type

-D <dspec>, --dir-spec=<dspec>

Directive specific

-Z,  --namespace-zeroes

If set, then the controller clear all logical blocks to zero in the entire namespace​.

-o <fmt>, --output-format=<fmt>

Set the reporting format to normal, json or binary​. Only one output format can be used at a time​.

-v,  --verbose

Increase the information detail in the output​.

-t <timeout>, --timeout=<timeout>

Override default timeout value​. In milliseconds​.

No examples yet​.

Part of the nvme-user suite

nvme(1).