nvme-ns-descs.1

NVME−NS−DESCS

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
NVME

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NAME

nvme-ns-descs − Send NVMe Identify for a list of Namespace Identification Descriptor structure, return result and structure

SYNOPSIS

nvme ns−descs <device> [−−namespace−id=<nsid> | −n <nsid>] [−−raw−binary | −b]
[−−output−format=<fmt> | −o <fmt>] [−−verbose | −v]

DESCRIPTION

For the NVMe device given, sends an identify for a list of namespace identification descriptor structures 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.

On success, the structure may be returned in one of several ways depending on the option flags; the structure may be parsed by the program or the raw buffer may be printed to stdout.

OPTIONS

−n <nsid>, −−namespace−id=<nsid>

Retrieve the identify namespace identification descriptor structure for the given nsid. This is required for the character devices, or overrides the block nsid if given.

−b, −−raw−binary

Print the raw buffer to stdout. Structure is not parsed by program.

−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.

EXAMPLES

• If using the character device or overriding namespace #2:

nvme ns−descs /dev/nvme0 −n 1

nvme ns−descs /dev/nvme0n1 −n 2

nvme ns−descs /dev/nvme0 −−namespace−id=1

• Have the program return the raw structure in binary:

nvme ns−descs /dev/nvme0n1 −−raw−binary > ns_descs.raw

nvme ns−descs /dev/nvme0n1 −b > ns_descs.raw

It is probably a bad idea to not redirect stdout when using this mode.

NVME

Part of the nvme−user suite

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