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nvme-ns-descs(1)
================
NAME
----
nvme-ns-descs - Send NVMe Identify for a list of Namespace Identification
Descriptor structure, return result and structure
SYNOPSIS
--------
[verse]
'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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