NVME-NS-ATTACH(1) NVMe Manual NVME-NS-ATTACH(1)

nvme-ns-attach - Send NVMe attach namespace, return result.

nvme [<global-options>] ns attach <device>
                        [--namespace-id=<nsid> | -n <nsid>]
                        [--controllers=<ctrl-list,> | -c <ctrl-list,>]

For the NVMe device given, sends the nvme namespace attach command for the provided namespace identifier, attaching to the provided list of controller identifiers.

The <device> parameter is mandatory NVMe character device (ex: /dev/nvme0) but not a namespace block device (ex: /dev/nvme0n1).

-n <nsid>, --namespace-id=<nsid>

The namespace identifier to attach but not attached already.

-c <ctrl-list,>, --controllers=<ctrl-list,>

The comma separated list of controller identifiers to attach the namespace to. If no list is provided, the namespace will be attached to the <device> controller used for this command.

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.

Attach namespace 2 to the controllers with id 0x21 and 0x22:
# nvme ns attach /dev/nvme1 -n 0x2 -c 0x21,0x22
Attach namespace 3 to nvme0:
# nvme ns attach /dev/nvme0 -n 3

Part of the nvme-user suite

09/07/2026 NVMe