Multipath Queries with multipath Command from the Ubuntu Server Guide by OnWorks

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5.7. Multipath Queries with multipath Command‌

You can use the -l and -ll options of the multipath command to display the current multipath configuration. The -l option displays multipath topology gathered from information in sysfs and the device mapper. The -ll option displays the information the -l displays in addition to all other available components of the system.

When displaying the multipath configuration, there are three verbosity levels you can specify with the -v option of the multipath command. Specifying -v0 yields no output. Specifying -v1 outputs the created or updated multipath names only, which you can then feed to other tools such as kpartx. Specifying -v2 prints all detected paths, multipaths, and device maps.

The default verbosity level of multipath is 2 and can be globally modified by defining the verbosity attribute in the defaults section of multipath.conf.

The following example shows the output of a multipath -l command.

# multipath -l

3600d0230000000000e13955cc3757800 dm-1 WINSYS,SF2372

size=269G features='0' hwhandler='0' wp=rw

|-+- policy='round-robin 0' prio=1 status=active

| `- 6:0:0:0 sdb 8:16 active ready running

`-+- policy='round-robin 0' prio=1 status=enabled

`- 7:0:0:0 sdf 8:80 active ready running

The following example shows the output of a multipath -ll command.

# multipath -ll

3600d0230000000000e13955cc3757801 dm-10 WINSYS,SF2372

size=269G features='0' hwhandler='0' wp=rw