NVME-ID-NVM-NS(1) NVMe Manual NVME-ID-NVM-NS(1)

nvme-id-nvm-ns - Send NVMe Identify NVM Command Set specific Namespace data structure, display structure

nvme [<global-options>] id nvm-ns <device>
                        [--uuid-index=<uuid-index> | -U <uuid_index>]
                        [--namespace-id=<NUM> | -n <NUM>]

Identify NVM Command Set specific Namespace data structure for the specified NSID for the NVM Command Set specified in the CSI field.

The <device> parameter is mandatory and may be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).

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 <NUM>, --namespace-id=<NUM>

Use the provided namespace id for the command. If not provided, the namespace id of the block device will be used. If the command is issued to a non-block device, the parameter is required.

-U <uuid-index>, --uuid-index=<uuid-index>

UUID Index of the feature

The following options are defined at the top-level nvme command and are available to this subcommand:

--dry-run

Print the command that would be executed, but do not actually execute it.

--no-ioctl-probing

Disable probing for 64-bit IOCTL support.

--no-retries

Disable retry logic on transient errors.

-o <fmt>, --output-format=<fmt>

Set the reporting format to normal, tabular, 'json, or binary. Only one output format may be used at a time.

--output-format-version=<version>

Select the output format version. Version 1 uses the original field naming, while version 2 (default) provides more consistent and script-friendly field names.

--timeout=<ms>

Set the timeout for the command in milliseconds.

-v, --verbose

Increase the level of detail in the output. May be specified multiple times to further increase verbosity.

These options can also be set as machine-wide defaults in nvme-cli.conf(5). A command-line flag always overrides the file.

•Has the program interpret the returned buffer and display the known fields in a human readable format: 
# nvme id nvm-ns /dev/nvme0n1
•If using the character device or overriding namespace id: 
# nvme id nvm-ns /dev/nvme0 -n 1
# nvme id nvm-ns /dev/nvme0n1 -n 1
# nvme id nvm-ns /dev/nvme0 --namespace-id=1
•Have the program return the raw structure in binary: 
# nvme id nvm-ns /dev/nvme0n1 -o binary > id_ns.raw
# nvme id nvm-ns /dev/nvme0n1 --output-format=binary > id_ns.raw

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

•Alternatively you may want to send the data to another program that can parse the raw buffer. 
NVME

Part of the nvme-user suite

09/07/2026 NVMe