Multipath -ll

From multipath man page.

-ll Show the current multipath topology from all available information (sysfs, the device mapper, path checkers ...).

multipath -ll
3600a09803831416c592b4f566453732e dm-3 NETAPP,LUN C-Mode
size=450G features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 1:0:0:7 sde 8:64  active ready running
| `- 3:0:0:7 sdi 8:128 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 1:0:1:7 sdg 8:96  active ready running
  `- 3:0:1:7 sdk 8:160 active ready running
3600a09803831417a5a244f5665797a99 dm-4 NETAPP,LUN C-Mode
size=200G features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 1:0:1:1 sdm 8:192 active ready running
| `- 3:0:1:1 sdo 8:224 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 1:0:0:1 sdl 8:176 active ready running
  `- 3:0:0:1 sdn 8:208 active ready running
3600a09803831417a5a244f5665797a58 dm-2 NETAPP,LUN C-Mode
size=200G features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 1:0:1:0 sdf 8:80  active ready running
| `- 3:0:1:0 sdj 8:144 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 1:0:0:0 sdd 8:48  active ready running
  `- 3:0:0:0 sdh 8:112 active ready running

Example with a faulty LUN:

multipath -ll
3600a09803831416c592b4f566453774e dm-3 NETAPP,LUN C-Mode
size=250G features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='service-time 0' prio=0 status=enabled
| |- 1:0:0:7 sde 8:64  failed faulty running
| `- 3:0:0:7 sdi 8:128 failed faulty running
`-+- policy='service-time 0' prio=0 status=enabled
  |- 1:0:1:7 sdg 8:96  failed faulty running
  `- 3:0:1:7 sdk 8:160 failed faulty running

See also

• Fibre Channel: HBA, multipath-tools, multipath, multipath -ll, /etc/multipath.conf multipathd rescan-scsi-bus.sh powermt Device mapper dmsetup ls,