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 get-property <device> [--offset=<offset> | -O <offset>]
                            [--human-readable | -H]
                            [--output-format=<fmt> | -o <fmt>] [--verbose | -v]
                            [--timeout=<timeout> | -t <timeout>]

## 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

-H

  --human-readable: Show the fields packed in the property

-o <fmt>
--output-format=<fmt>

  Set the reporting format to normal, json or binary. Only one output format can be used at a time.

-v
--verbose

  Increase the information detail in the output.

-t <timeout>
--timeout=<timeout>

  Override default timeout value. In milliseconds.

## EXAMPLES

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

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

## 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