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Date:      Thu, 8 Sep 2016 15:35:50 +0300
From:      Ruslan Makhmatkhanov <rm@FreeBSD.org>
To:        Gary Palmer <gpalmer@freebsd.org>, Ruslan Makhmatkhanov <rm@FreeBSD.org>
Cc:        Maurizio Vairani <maurizio.vairani@cloverinformatica.it>, freebsd-fs@freebsd.org
Subject:   Re: ZFS-8000-8A: assistance needed
Message-ID:  <75465e13-7992-4172-ab40-51b2e462a400@FreeBSD.org>
In-Reply-To: <20160908121617.GA42278@in-addr.com>
References:  <c6e3d35a-d554-a809-4959-ee858c38aca7@FreeBSD.org> <b9edb1ae-b59a-aefc-f547-1fb69e79f0f7@cloverinformatica.it> <11f2a660-304d-4a50-bab8-ec2a2737b3a4@FreeBSD.org> <20160908121617.GA42278@in-addr.com>

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Gary Palmer wrote on 09/08/2016 15:16:
> On Thu, Sep 08, 2016 at 02:46:04PM +0300, Ruslan Makhmatkhanov wrote:
>> Maurizio Vairani wrote on 09/08/2016 10:39:
>>> Hi Ruslan,
>>>
>>> Il 06/09/2016 22:00, Ruslan Makhmatkhanov ha scritto:
>>>>     NAME              STATE     READ WRITE CKSUM
>>>>     storage_ssd       ONLINE       0     0 59.3K
>>>>       mirror-0        ONLINE       0     0     0
>>>>         gpt/drive-06  ONLINE       0     0     0
>>>>         gpt/drive-07  ONLINE       0     0     9
>>>>       mirror-1        ONLINE       0     0  119K
>>>>         gpt/drive-08  ONLINE       0     0  119K
>>>>         gpt/drive-09  ONLINE       0     0  119K
>>>>     cache
>>>>       mfid5           ONLINE       0     0     0
>>>>       mfid6           ONLINE       0     0     0
>>>>
>
>> So, I'm interested how you detect that particular drives (with gpt
>> labels drive-07, drive-08 and drive-09) are failing?
>
> The CKSUM errors from the zpool status output.  They are
> indicative of underlying problems.  gpt/drive-07 has a low count
> so it's possibly not a major problem, but gpt/drive-08 and
> gpt/drive-09 both have a significant number.  I find it a bit
> curious that both drives in the mirror have similar number of
> errors.  Possibly indicating data pathing errors.

Ah, ok, thanks. I wasn't able to find meaning of CKSUM field description 
in zpool manpage, so didn't got it at the time. Not sure about data 
pathing errors though.

>
> I presume you are using ECC memory?

Yes, it's ECC.


-- 
Regards,
Ruslan

T.O.S. Of Reality



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