[zfs-discuss] cannot import 'home': I/O error Destroy and re-create the pool from a backup source

Gionatan Danti g.danti at assyoma.it
Fri Apr 27 15:05:28 EDT 2018


Il 27-04-2018 20:20 Anton Gubar'kov via zfs-discuss ha scritto:
> Dear friends,
> 
> I still fail to understand the meaning of CKSUM errors on radiz0 vdev
> and pool levels. Can someone explain this to me? Before I understand
> these numbers I discard them as non credible (noise).
> 
> When it comes to CKSUM errors on drives, I have 2 suspects: cables and
> drives. I can't imagine that controller/RAM issues affect only 2
> drives and leave other 4 intact (0 errors).
> I'll start examining these once my read verify of backups is over.
> Can anyone suggest a torture (read/write/verify-by-compare or
> checksum) test for the drives? I was thinking of creating a new pool
> on the defective drive and placing a zvol on it and then running
> badblocks on the zvol. But this method won't produce a list of bad
> blocks, but I would like to have them.
> 
> Seagate support suggested their non-destructive Seatools. I suspect
> it's their warranty procedure and they rely on either SMART or other
> driver embedded error reporting not serving my purpose.
> 
> Anton.

I strongly suspect this is power supply related. Are the two affected 
drives powered by the same rail/cable? Can you share the output of 
"smartctl --all /dev/sdX" for each disk, explicitly marking the 
problematic ones?

Thanks.

-- 
Danti Gionatan
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Assyoma S.r.l. - www.assyoma.it
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