SYNOPSIS

nvme [<global-options>] feat power-mgmt <device>
                        [--ps=<ps> | -p <ps>] [--wh=<wh> | -w <wh>]
                        [--sel=<select> | -S <select>] [--save | -s]

DESCRIPTION

Get and set power management feature.

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 setting option (--ps) is specified, the command will update the power management configuration. If the --ps option is omitted, it will retrieve and display the current configuration.

On success it returns 0, error code otherwise.

OPTIONS

-p <ps>
--ps=<ps>

Power state. Specifies the power state to transition the controller to.

-w <wh>
--wh=<wh>

Workload hint. Provides a hint to the controller about the workload characteristics.

-S <select>
--sel=<select>

Select (SEL): This field specifies which value of the attributes to return in the provided data:

-s
--save

Save the attribute so that it persists through all power states and resets.

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 <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.

EXAMPLES

  • Has the program issue a feat power-mgmt to get the current configuration: 

    # nvme feat power-mgmt /dev/nvme0

  • Has the program issue a feat power-mgmt to set power state and workload hint: 

    # nvme feat power-mgmt /dev/nvme0 --ps=1 --wh=2 --save

NVME

Part of the nvme-user suite.