Multipath not running

Solution Verified - Updated -

Issue

can see  devices below

[root@uhndora01d ~]# multipath -l
mpath2 (360060e8005b03d000000b03d000000fd) dm-2 HP,OPEN-V
[size=1.0G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:0:0 sdc 8:32  [active][undef]
\_ 1:0:1:0 sdf 8:80  [active][undef]
\_ 2:0:0:0 sdi 8:128 [active][undef]
\_ 2:0:1:0 sdl 8:176 [active][undef]
mpath4 (360060e8005b03d000000b03d000001a5) dm-4 HP,OPEN-V
[size=100G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:0:2 sde 8:64  [active][undef]
\_ 1:0:1:2 sdh 8:112 [active][undef]
\_ 2:0:0:2 sdk 8:160 [active][undef]
\_ 2:0:1:2 sdn 8:208 [active][undef]
mpath3 (360060e8005b03d000000b03d000001a4) dm-3 HP,OPEN-V
[size=100G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=0][active]
\_ 1:0:0:1 sdd 8:48  [active][undef]
\_ 1:0:1:1 sdg 8:96  [active][undef]
\_ 2:0:0:1 sdj 8:144 [active][undef]
\_ 2:0:1:1 sdm 8:192 [active][undef]
[root@uhndora01d ~]#

why it is showing  four devices in a single mpath. there are two single port HBA on  server going to two SAN switches which is then attached to SAN.

Environment

  • Red Hat Enterprise Linux 5.3
  • device-mapper-multipath

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