[rhel6] How-to show failed paths with "multipath"

[Nicolas C.]

Hello,

With RHEL6 on a SAN environment, is it possible to display dead paths
with "multipath" ?

This is the output of "multipath -ll" a RHEL4 server :

data (360050768028107fac00000000000009f)
[size=150 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [enabled]
\_ 3:0:0:2 sde 8:64 [failed][faulty]
\_ 4:0:0:2 sdm 8:192 [failed][faulty]
\_ round-robin 0 [prio=20][active]
\_ 3:0:1:2 sdi 8:128 [active][ready]
\_ 4:0:1:2 sdq 65:0 [active][ready]

We can see failed paths. And this is the output on RHEL6 :

sata (360050768028107fac0000000000000d0) dm-3 IBM,2145
size=170G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=10 status=active
|- 4:0:1:1 sdf 8:80 active ready running
`- 3:0:1:1 sdj 8:144 active ready running

Increasing the verbose level of "multipath" doesn't work (the
"/etc/multipath.conf" file is classic on both systems).

Thanks,

Nicolas

[emmanuel segura]

In the newers Suse 11 and Redhat 6, when a path is los, the dead devices
are removed from system, that's what i know

Post by Nicolas C.
Hello,
With RHEL6 on a SAN environment, is it possible to display dead paths with
"multipath" ?
data (360050768028107fac00000000000009f)
[size=150 GB][features="1 queue_if_no_path"][hwhandler="0"]
\_ round-robin 0 [enabled]
\_ 3:0:0:2 sde 8:64 [failed][faulty]
\_ 4:0:0:2 sdm 8:192 [failed][faulty]
\_ round-robin 0 [prio=20][active]
\_ 3:0:1:2 sdi 8:128 [active][ready]
\_ 4:0:1:2 sdq 65:0 [active][ready]
sata (360050768028107fac0000000000000d0) dm-3 IBM,2145
size=170G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=10 status=active
|- 4:0:1:1 sdf 8:80 active ready running
`- 3:0:1:1 sdj 8:144 active ready running
Increasing the verbose level of "multipath" doesn't work (the
"/etc/multipath.conf" file is classic on both systems).
Thanks,
Nicolas
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