[dm-devel] how to troubleshoot faulty multipath path?
Moger, Babu
Babu.Moger at netapp.com
Fri Dec 16 17:55:12 UTC 2011
> -----Original Message-----
> From: Rudy Gevaert [mailto:Rudy.Gevaert at UGent.be]
> Sent: Friday, December 16, 2011 9:49 AM
> To: dm-devel
> Subject: [dm-devel] how to troubleshoot faulty multipath path?
>
> Hello,
>
> I'm running an IBM DS3400 and am seeing a faulty paths:
>
> mail11-ds3400-1 (3600a0b80005a591a0000042b4cac46de) dm-2 IBM,1726-4xx
> FAStT size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
> |-+- policy='round-robin 0' prio=0 status=enabled
> | `- 1:0:0:11 sdd 8:48 active faulty running
> `-+- policy='round-robin 0' prio=-1 status=active
> `- 5:0:0:11 sdr 65:16 active undef running
> mail10-ds3400-1 (3600a0b80005a67b60000046a4cac4613) dm-1 IBM,1726-4xx
> FAStT size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
> |-+- policy='round-robin 0' prio=0 status=enabled
> | `- 5:0:0:10 sdq 65:0 active faulty running
> `-+- policy='round-robin 0' prio=-1 status=active
> `- 1:0:0:10 sdc 8:32 active undef running
> mail15r-ds3400-1 (3600a0b80005a67b60000046d4cac464f) dm-6 IBM,1726-4xx
> FAStT size=550G features='1 queue_if_no_path' hwhandler='1 rdac' wp=rw
> |-+- policy='round-robin 0' prio=0 status=enabled
> | `- 5:0:0:15 sdv 65:80 active faulty running
> `-+- policy='round-robin 0' prio=-1 status=active
> `- 1:0:0:15 sdh 8:112 active undef running
My initial guess is, there could be problem with your configuration.
Can you paste output of "multipath -ll". How does your multipath.conf
look like. Can you paste that as well.
You messages file might help also.
>
>
> The storage software says those luns are not 'on the preferred path'.
>
> I'm a bit clueless where to look next.
>
> I see on the storage software that other luns are on that controller,
so it
> seems to me that controller/path is not the problem.
>
> Where should I look next? I'm afraid that if I change the ownership
it will
> take the lun offline.
>
> Thanks in advance,
>
> Rudy
>
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