Some paths are missing in multipath?
Issue
- Some sub paths are missing in multipath. I have tried to force lip the HBA card as well, and the storage team have confirmed that they can see no errors on their side.
The hardware is IBM X3650. There are two HBAs configured each with 2 paths:
1a:00.0 Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03)
1a:00.1 Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03)
But multupath is not listing some of the paths randomly:
mpath1 (3600c0ff0001187d84537fe5101000000) dm-7 IBM,2145
[size=140G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 5:0:0:1 sdc 8:32 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 5:0:2:1 sdk 8:160 [active][ready]
\_ 6:0:0:1 sds 65:32 [active][ready]
mpath0 (3600c0ff0001187d84537fe5101000001) dm-6 IBM,2145
[size=80G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=100][active]
\_ 5:0:2:0 sdj 8:144 [active][ready]
\_ 6:0:0:0 sdr 65:16 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 5:0:0:0 sdb 8:16 [active][ready]
\_ 6:0:2:0 sdz 65:144 [active][ready]
mpath2 (3600c0ff0001187d84537fe5101000002) dm-13 IBM,2145
[size=125G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=50][enabled]
\_ 5:0:3:3 sdq 65:0 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 5:0:1:3 sdi 8:128 [active][ready]
\_ 6:0:1:3 sdy 65:128 [active][ready]
mpath3 (3600c0ff0001187d84537fe5101000003) dm-12 IBM,2145
[size=50G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 5:0:1:2 sdh 8:112 [active][ready]
\_ 6:0:1:2 sdx 65:112 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 5:0:3:2 sdp 8:240 [active][ready]
mpath4 (3600c0ff0001187d84537fe5101000004) dm-11 IBM,2145
[size=80G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 5:0:1:1 sdg 8:96 [active][ready]
\_ 6:0:1:1 sdw 65:96 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 5:0:3:1 sdo 8:224 [active][ready]
mpath5 (3600c0ff0001187d84537fe5101000005) dm-10 IBM,2145
[size=50G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=100][active]
\_ 5:0:1:0 sdf 8:80 [active][ready]
\_ 6:0:1:0 sdv 65:80 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 5:0:3:0 sdn 8:208 [active][ready]
mpath6 (3600c0ff0001187d84537fe5101000006) dm-8 IBM,2145
[size=601G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=50][active]
\_ 5:0:0:2 sdd 8:48 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 5:0:2:2 sdl 8:176 [active][ready]
\_ 6:0:0:2 sdt 65:48 [active][ready]
mpath7 (3600c0ff0001187d84537fe5101000007) dm-9 IBM,2145
[size=75G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 5:0:2:3 sdm 8:192 [active][ready]
\_ 6:0:0:3 sdu 65:64 [active][ready]
\_ round-robin 0 [prio=10][enabled]
\_ 5:0:0:3 sde 8:64 [active][ready]
Environment
- Red Hat Enterprise Linux(RHEL) 5.5
- Device Mapper Multipath(DM Multipath)
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