From: Brad Campbell <lists2009@fnarfbargle.com>
To: Wolfgang Denk <wd@denx.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: Huge values of mismatch_cnt on RAID 6 arrays under Fedora 18
Date: Mon, 28 Jan 2013 10:07:46 +0800 [thread overview]
Message-ID: <5105DD72.6080909@fnarfbargle.com> (raw)
In-Reply-To: <20130127192656.634892005AD@gemini.denx.de>
On 28/01/13 03:26, Wolfgang Denk wrote:
> I have seen "mismatch_cnt is not 0" warnings in the past, but that has
> always been with RAID 1 arrays, and with relatively small numbers on
> /sys/block/md*/md/mismatch_cnt; my understanding was that this was not
> actually critical.
>
> However, after updating to Fedora 18, I get this message from all
> updated
> systems that have RAID 6 arrays, and with _huge_ numbers of
> mismatch_cnt, like that:
I saw this when I put two drives from a 10 drive RAID6 on a sil3124
card. Unfortunately by the time I figured out what was going on my array
was trashed.
Massive mismatch counts are indicative of an insidious problem further
down the storage stack. Check your drivers, cards, cables and PSU.
next prev parent reply other threads:[~2013-01-28 2:07 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-27 19:26 Huge values of mismatch_cnt on RAID 6 arrays under Fedora 18 Wolfgang Denk
2013-01-27 19:45 ` Chris Murphy
2013-01-27 23:10 ` Wolfgang Denk
2013-01-27 20:05 ` Robin Hill
2013-01-27 23:11 ` Wolfgang Denk
2013-01-28 1:14 ` Phil Turmel
2013-01-28 1:42 ` Chris Murphy
2013-01-28 2:16 ` Chris Murphy
2013-01-28 6:43 ` Wolfgang Denk
2013-01-28 6:36 ` Wolfgang Denk
2013-01-28 7:00 ` Chris Murphy
2013-01-28 10:27 ` Wolfgang Denk
2013-01-28 6:27 ` Wolfgang Denk
2013-01-28 2:07 ` Brad Campbell [this message]
2013-01-28 6:39 ` Wolfgang Denk
2013-01-28 7:58 ` Dan Williams
2013-01-28 17:37 ` Piergiorgio Sartor
2013-01-28 18:12 ` Chris Murphy
2013-01-28 19:00 ` Wolfgang Denk
2013-01-28 19:10 ` Wolfgang Denk
2013-01-28 19:22 ` Piergiorgio Sartor
2013-01-28 20:19 ` Wolfgang Denk
2013-01-28 20:44 ` Piergiorgio Sartor
2013-01-28 22:47 ` Chris Murphy
2013-01-28 22:49 ` Chris Murphy
2013-01-28 23:03 ` Wolfgang Denk
2013-01-28 23:13 ` Chris Murphy
2013-01-28 23:31 ` Wolfgang Denk
2013-01-28 22:59 ` Wolfgang Denk
2013-01-28 23:07 ` Chris Murphy
2013-01-28 23:23 ` Wolfgang Denk
2013-01-28 23:42 ` Chris Murphy
2013-01-29 18:02 ` Roy Sigurd Karlsbakk
2013-01-29 18:28 ` Wolfgang Denk
2013-01-29 18:43 ` Roy Sigurd Karlsbakk
2013-01-29 17:49 ` Piergiorgio Sartor
2013-01-29 19:35 ` Paul Menzel
2013-01-29 20:18 ` Piergiorgio Sartor
2013-01-28 23:18 ` Wolfgang Denk
2013-01-29 17:57 ` Piergiorgio Sartor
2013-01-29 18:43 ` Wolfgang Denk
2013-01-29 20:24 ` Piergiorgio Sartor
2013-01-31 12:12 ` Wolfgang Denk
2013-01-31 17:14 ` Chris Murphy
2013-01-31 17:51 ` Piergiorgio Sartor
2013-01-31 18:36 ` Wolfgang Denk
2013-01-31 19:35 ` Chris Murphy
2013-01-31 19:46 ` Chris Murphy
2013-01-31 20:05 ` Wolfgang Denk
2013-01-31 20:41 ` Chris Murphy
2013-01-31 17:47 ` Piergiorgio Sartor
2013-01-28 19:18 ` Piergiorgio Sartor
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