[OpenIndiana-discuss] ZFS keeps finding errors

[Robin Axelsson]

I would investigate the possibility to hook the hard drives up to
another system with say, an LSI 1068 based controller and see how they
behave there...


On 2013-12-21 16:13, Jim Klimov wrote:
> Hello all,
>
> I got access to my old Home-NAS again, which got me looking under deep
> the hood of ZFS in the first place due to strange errors with my pool.
> This is a Pentium-4 based PC including an Asus P5B-Deluxe motherboard
> with 7 SATA connectors (an Intel and a JMicron set), with 8GB of
> (non-ECC) memory. Used to be quite a machine back in its day as a PC
> and gaming station! ;)
>
> Currently it serves as an OpenIndiana-based storage unit, but serves
> poorly: despite using raidz2 over 6*2Tb drives, it keeps finding errors
> (and DD'ing the offsets from disks shows that indeed there is trash on
> disk instead of proper data). Also the system disk finds and fixes some
> checksum errors on every scrub - luckily, it uses copies=2. While there
> was only the old 80Gb SATA (which I thought had died - but did not) it
> usually found 2-6 errors per scrub. Now I have mirrored it with a newer
> 250Gb SATA (picked from an HP Microserver barebone) to migrate the OS
> from an old disk, and it finds and fixes up to 30 errors per scrub.
>
> My guess is that these problems may be due to randomness from overheat
> in the CPU or chipset - but no real complaints here, insufficient power
> somehow or lack of ECC. Or just plain age is showing... All I can say
> instrumentally is that long SMART tests did not find any errors.
>
> So far I am trying to evacuate the remaining data from this box to
> some other storage. But I am not sure what to do with it or its parts
> such as disks - can they be trusted to rebuild a new pool, for example?
> Or should they be safer put away or repurposed back into a PC?..
>
> Any ideas or comments?
> Thanks,
> //Jim
>
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