nvme-id-primary-ctrl-caps(1)

# nvme-id-primary-ctrl-caps(1) Manual Page

## NAME

nvme-id-primary-ctrl-caps - Send identify Primary Controller Caps, return result and structure

## SYNOPSIS

    nvme [<global-options>] id primary-ctrl-caps <device>

## DESCRIPTION

For the NVMe device given, sends an identify primary Controller caps command and provides the result and returned structure.

The <device> 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

## 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

- Get Primary Ctrl Caps of the device in default format

      # nvme id primary-ctrl-caps /dev/nvme0

- Has the program interpret the returned buffer and display the known fields in a human readable format:

      # nvme id primary-ctrl-caps /dev/nvme0 --verbose
      # nvme id primary-ctrl-caps /dev/nvme0 -v

## NVME

Part of the nvme-user suite