[OmniOS-discuss] ZFS/COMSTAR - zpool reports errors

[Michael Rasmussen]

On Wed, 12 Aug 2015 16:50:49 +0200
Stephan Budach <stephan.budach at JVM.DE> wrote:

> Ahh… that was too soon… ;) Actually one of the RAC nodes noticed an 
> error at or rather a couple of mintues before this issue, when it 
> reported this:
> 
> Aug 11 20:25:04 btierasm01 kernel: sd 75:0:0:1: [sdx] Unhandled sense code
> Aug 11 20:25:04 btierasm01 kernel: sd 75:0:0:1: [sdx] Result: 
> hostbyte=invalid driverbyte=DRIVER_SENSE
> Aug 11 20:25:04 btierasm01 kernel: sd 75:0:0:1: [sdx] Sense Key : Medium 
> Error [current]
> Aug 11 20:25:04 btierasm01 kernel: sd 75:0:0:1: [sdx]  Add. Sense: 
> Unrecovered read error
> Aug 11 20:25:04 btierasm01 kernel: sd 75:0:0:1: [sdx] CDB: Read(10): 28 
> 00 60 b2 54 28 00 00 80 00
> Aug 11 20:25:04 btierasm01 kernel: end_request: critical target error, 
> dev sdx, sector 1622299688
> Aug 11 20:25:04 btierasm01 kernel: end_request: critical target error, 
> dev dm-25, sector 1622299688
> Aug 11 20:25:04 btierasm01 kernel: ADVMK-0020: A read error was reported 
> to the ASM instance for volume vg_nfs07fwd-16 in diskgroup DG_NFS07SA
> 
> This vg_nfs07fwd-16 is a RAC volume, which is presented via NFS from the 
> RAC cluster nodes to some Oracle VM hosts, but neither of those hosts 
> had any issues with that volume at any time, so I assmume  the request 
> came from the RAC node itself and I will dig into the logs to see, what 
> it actually treid to do with the volume.
> 
> I am still wondering if this issue is somewhat related to COMSTAR or the 
> zpool itself.
> 

I wonder whether this is a hardware issue (eg driver firmware). What if
the firmware has marked a sector bad and have moved it elsewhere. Could
one imagine that this move have taking place unnoticed to ZFS?

-- 
Hilsen/Regards
Michael Rasmussen

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