nvme-get-property(1)

# nvme-get-property(1) Manual Page

## NAME

nvme-get-property - Reads and shows the defined NVMe controller property for NVMe over Fabric

## SYNOPSIS

    nvme [<global-options>] get-property <device>
                            [--offset=<offset> | -O <offset>]

## DESCRIPTION

Reads and shows the defined NVMe controller property for NVMe over Fabric.

## OPTIONS

-O <offset>
--offset=<offset>

  The offset of the property. One of CAP=0x0, VS=0x8, CC=0x14, CSTS=0x1c, NSSR=0x20

## 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

- The following will run the get-property command with offset 0

      # nvme get-property /dev/nvme0 --offset=0x0 --verbose

## BUGS

Currently the CAP value is truncated to 32 bits due to a limitation in the ioctl interface.

In a recent enough kernel, the 64 bit value is shown in kernel traces.

- First enable traces by this command

      # echo 1 > /sys/kernel/debug/tracing/events/nvme/enable

- Then look for NVMe Fabrics command (0x7f) at trace

      /sys/kernel/debug/tracing/trace

## NVME

Part of the nvme-user suite