NVME-LOG-EFFECTS(1)               NVMe Manual              NVME-LOG-EFFECTS(1)

NAME
       nvme-log-effects - Send NVMe Command Effects log page request, returns
       result and log

SYNOPSIS
       nvme [<global-options>] log effects <device> [--raw-binary | -b]

DESCRIPTION
       Retrieves the NVMe Command Effects log page from an NVMe device and
       provides the returned structure.

       The <device> parameter is mandatory and should be the NVMe character
       device (ex: /dev/nvme0).

       On success, the returned command effects log structure will be printed
       for each command that is supported.

OPTIONS
       -b, --raw-binary
           This option will print the raw buffer to stdout. Structure is not
           parsed by program. This overrides the verbose option.

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
       o   Print the effects log page in a human readable format:

               # nvme log effects /dev/nvme0

       o   Have the program return the raw structure in binary:

               # nvme log effects /dev/nvme0 --raw-binary > effects_log.raw
               # nvme log effects /dev/nvme0 -b > effects_log.raw

NVME
       Part of the nvme-user suite

NVMe                              09/07/2026               NVME-LOG-EFFECTS(1)