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

nvme-id-ns-granularity - Send a Identify Namespace Granularity List command to the specified device

nvme [<global-options>] id ns-granularity <device>

Send a Identify Namespace Granularity List command command to the specified device, return results.

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

On success it returns 0, error code otherwise.

The bare nvme id-ns-granularity form (without a space) still works as a deprecated alias and will be removed in a future major version. New scripts should use nvme id ns-granularity instead.

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. Other versions are rejected.

--quiet

Suppress informational messages. Errors are still reported, and --quiet cancels any --verbose for the library log level.

--set-options=<key=value>[,<key=value>...]

Set libnvme library options for this invocation. Supported keys are force-4k, mi-probe-enabled, test-base-dir and test-sysfs-dir.

--timeout=<ms>

Set the timeout for the command in milliseconds. infinite or -1 waits without a time limit (0xffffffff).

-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 issue a id-ns-granularity to display structure. 
# nvme id ns-granularity /dev/nvme0

Part of the nvme-user suite.

10/30/2026 NVMe