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

# [NAME](#NAME)

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

# [SYNOPSIS](#SYNOPSIS)

```
nvme [<global-options>] id nvm-ns <device>


                        [--uuid-index=<uuid-index> | -U <uuid_index>]


                        [--namespace-id=<NUM> | -n <NUM>]
```

# [DESCRIPTION](#DESCRIPTION)

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

The &lt;device&gt; 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.

# [OPTIONS](#OPTIONS)

-n &lt;NUM&gt;, --namespace-id=&lt;NUM&gt;

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 &lt;uuid-index&gt;, --uuid-index=&lt;uuid-index&gt;

UUID Index of the feature

# [GLOBAL OPTIONS](#GLOBAL_OPTIONS)

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 &lt;fmt&gt;, --output-format=&lt;fmt&gt;

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

--output-format-version=&lt;version&gt;

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=&lt;ms&gt;

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)](/man/os/nvme-cli/nvme-cli.conf.5). A command-line flag always overrides the file.

# [EXAMPLES](#EXAMPLES)

•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

09/18/2026 NVMe

---

Document: nvme-id-nvm-ns(1) from nvme-cli 3.1-r1 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli