nvme-ns-descs − Send NVMe Identify for a list of Namespace Identification Descriptor structure, return result and structure
nvme
ns−descs <device>
[−−namespace−id=<nsid> | −n
<nsid>]
[−−raw−binary | −b]
[−−output−format=<fmt> | −o
<fmt>]
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.
−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 <format>, −−output−format=<format>
Set the reporting format to normal, json, or binary. Only one output format can be used at a time.
• 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.
Part of the nvme−user suite