From owner-freebsd-fs@freebsd.org  Thu Sep  8 12:37:14 2016
Return-Path: <owner-freebsd-fs@freebsd.org>
Delivered-To: freebsd-fs@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 976C2BD0CDF
 for <freebsd-fs@mailman.ysv.freebsd.org>; Thu,  8 Sep 2016 12:37:14 +0000 (UTC)
 (envelope-from rm@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
 [IPv6:2001:1900:2254:206c::16:87])
 by mx1.freebsd.org (Postfix) with ESMTP id 8ABCA83C;
 Thu,  8 Sep 2016 12:37:14 +0000 (UTC) (envelope-from rm@FreeBSD.org)
Received: from [127.0.0.1] (localhost [IPv6:::1])
 by freefall.freebsd.org (Postfix) with ESMTP id 757F81247;
 Thu,  8 Sep 2016 12:37:13 +0000 (UTC) (envelope-from rm@FreeBSD.org)
Subject: Re: ZFS-8000-8A: assistance needed
To: Gary Palmer <gpalmer@freebsd.org>, Ruslan Makhmatkhanov <rm@FreeBSD.org>
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>
Cc: Maurizio Vairani <maurizio.vairani@cloverinformatica.it>,
 freebsd-fs@freebsd.org
From: Ruslan Makhmatkhanov <rm@FreeBSD.org>
Message-ID: <75465e13-7992-4172-ab40-51b2e462a400@FreeBSD.org>
Date: Thu, 8 Sep 2016 15:35:50 +0300
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101
 Thunderbird/45.2.0
MIME-Version: 1.0
In-Reply-To: <20160908121617.GA42278@in-addr.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs/>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
 <mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 08 Sep 2016 12:37:14 -0000

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