nvme-dsm - Man Page

nvme dsm <device> [--namespace-id=<nsid> | -n <nsid>]
                        [--ctx-attrs=<attribute-list,> | -a <attribute-list,>]
                        [--blocks=<nlb-list,> | -b <nlb-list,>]
                        [--slbs=<slba-list,> | -s <slba-list,>]
                        [--ad=<deallocate> | -d <deallocate>]
                        [--idw=<write> | -w <write>] [--idr=<read> | -r <read>]
                        [--cdw11=<cdw11> | -c <cdw11>]
                        [--output-format=<fmt> | -o <fmt>] [--verbose | -v]
                        [--timeout=<timeout> | -t <timeout>]

For the NVMe device given, sends a Data Set Management command and provides the result and returned structure​.

The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1)​. If the character device is given, the '--namespace-id' option is mandatory, otherwise it will use the ns-id of the namespace for the block device you opened​. For block devices, the ns-id used can be overridden with the same option​.

You must specify at least one of the values for range list​. If the range lists provided do not list the same number of elements, the default values for the remaining in the range will be set to 0​.

The command dword 11 may be provided at the command line​. For convenience, the current defined attributes (discard, integral read/write) for a data-set management have flags​. If cdw11 is specified, this will override any settings from the flags may have provided​.

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

Sends the command with the requested nsid​. This is required for the character devices, or overrides the block nsid if given​.

-a <attribute-list,>, --ctx-attrs=<attribute-list>

Comma separated list of the context attributes in each range

-b <nlb-list,>, --blocks=<nlb-list,>

Comma separated list of the number of blocks in each range

-s <slba-list,>, --slbs=<slba-list,>

Comma separated list of the starting block in each range

-d <deallocate>, --ad=<deallocate>

Attribute Deallocate​.

-w <write>, --idw=<write>

Attribute Integral Dataset for Write​.

-r <read>, --idr=<read>

Attribute Integral Dataset for Read​.

-c <cdw11>, --cdw11=<cdw11>

All the command command dword 11 attributes​. Use exclusive from specifying individual attributes

-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).