NAME

       nvme-write-zeroes - Send an NVMe write zeroes command, return results

SYNOPSIS

       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>]
                               [--output-format=<fmt> | -o <fmt>] [--verbose | -v]
                               [--timeout=<timeout> | -t <timeout>]

DESCRIPTION

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

OPTIONS

       -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

       -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.

EXAMPLES

       No examples yet.

NVME

       Part of the nvme-user suite