diff options
Diffstat (limited to 'Documentation/nvme-ns-descs.txt')
| -rw-r--r-- | Documentation/nvme-ns-descs.txt | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/Documentation/nvme-ns-descs.txt b/Documentation/nvme-ns-descs.txt new file mode 100644 index 0000000..04c6e51 --- /dev/null +++ b/Documentation/nvme-ns-descs.txt @@ -0,0 +1,76 @@ +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 |