#!/bin/bash

cat <

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multipath-tools v0.4.9 (05/33, 2016)

Usage:

  multipath [-a|-A|-c|-w|-W] [-d] [-T tm:val] [-r] [-v lvl] [-p pol] [-b fil] [-q] [dev]

  multipath -l|-ll|-f [-v lvl] [-b fil] [dev]

  multipath -F [-v lvl]

  multipath -t

  multipath -h

Where:

  -h      print this usage text

  -l      show multipath topology (sysfs and DM info)

  -ll     show multipath topology (maximum info)

  -f      flush a multipath device map

  -F      flush all multipath device maps

  -a      add a device wwid to the wwids file

  -A      add devices from kernel command line mpath.wwids

          parameters to wwids file

  -c      check if a device should be a path in a multipath device

  -T tm:val

          check if tm matches the multipathd timestamp. If so val is

          whether or not the device is a path in a multipath device

  -q      allow queue_if_no_path when multipathd is not running

  -d      dry run, do not create or update devmaps

  -t      dump internal hardware table

  -r      force devmap reload

  -B      treat the bindings file as read only

  -p      policy failover|multibus|group_by_serial|group_by_prio

  -b fil  bindings file location

  -w      remove a device from the wwids file

  -W      reset the wwids file include only the current devices

  -p pol  force all maps to specified path grouping policy :

          . failover            one path per priority group

          . multibus            all paths in one priority group

          . group_by_serial     one priority group per serial

          . group_by_prio       one priority group per priority lvl

          . group_by_node_name  one priority group per target node

  -v lvl  verbosity level

          . 0 no output

          . 1 print created devmap names only

          . 2 default verbosity

          . 3 print debug information

  dev     action limited to:

          . multipath named 'dev' (ex: mpath0) or

          . multipath whose wwid is 'dev' (ex: 60051..)

          . multipath including the path named 'dev' (ex: /dev/sda)

          . multipath including the path with maj:min 'dev' (ex: 8:0)

EOF