[OmniOS-discuss] ZFS data corruption

[Joerg Goltermann]

Hi,

the PSOD you got can cause the problems on your exchange database.

Can you check the ESXi logs for the root cause of the PSOD?

I never got a PSOD on such a "corruption". I still think this is
a "cosmetic" bug, but this should be verified by one of the ZFS
developers ...

  - Joerg

On 17.08.2015 15:48, wuffers wrote:
>
> On Mon, Aug 17, 2015 at 8:04 AM, Joerg Goltermann <jg at osn.de
> <mailto:jg at osn.de>> wrote:
>
>     Hi,
>
>     we have the same problems. First time it occurs about 6 month
>     ago, I wrote several mails on the zfs list but I was not able
>     to solve the problem.
>
>     The last mail was http://permalink.gmane.org/gmane.os.illumos.zfs/4883
>     I tried to debug the issue, but my zfs knowledge is not deep enough.
>
>     Hopefully we can solve this nasty thing now ....
>
>
>     In my case I am quite sure this is not a real corruption, it's a retry
>     with "strange" flags which caused my "errors". Maybe this IO is very
>     slow, which can cause problems on the hosts, but i have never seen
>     any real problems....
>
>
> One of the VMs on that datastore was Exchange, and it definitely had
> issues. I had to evacuate and move several mailboxes to another
> database, and repair some of them (users were reporting strange issues
> like not being able to move emails to existing folders).
>
> I don't think it's a coincidence that a VM that was on that block device
> suddenly had weird issues (and the Exchange VM was consuming the largest
> amount of space in that datastore).
>
>
>     On 16.08.2015 19:11, Stephan Budach wrote:
>
>         So, did your first scrub reveal any error at all? Mine didn't and I
>         suspect, that you issued a zpool clear prior to scrubbing, which
>         made
>         the errors go away on both of my two zpools…
>
>         I'd say, that you had excatly the same error as me.
>
>
> I am 100% certain I did not issue a zpool clear. I ran the scrub only
> once (as it takes ~8 days for it to go through in my case).
>    pool: tank
>   state: ONLINE
>    scan: scrub repaired 0 in 184h28m with 0 errors on Wed Aug  5
> 06:38:32 2015
>

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