NVME-FEAT-POWER-M(1)

NAME
nvme-feat-power-mgmt - Get and set power management feature

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.