--- On Thu, 21/1/10, Farkas Levente <lfarkas@lfarkas.org> wrote:

From: Farkas Levente <redacted>
Subject: Re: Why does one get mismatches?
To: "Steven Haigh" <redacted>
Cc: "Asdo" <redacted>, linux-raid@vger.kernel.org
Date: Thursday, 21 January, 2010, 11:48
On 01/21/2010 11:52 AM, Steven Haigh
wrote:

quoted

On Thu, 21 Jan 2010 09:08:42 +0100, Asdo[off-list ref] 

wrote:

quoted

quoted

Steven Haigh wrote:

quoted

On Wed, 20 Jan 2010 17:43:45 -0500, Brett

Russ[off-list ref]

quoted

wrote:

quoted

quoted

CUT!

Might that be a problem of the disks/controllers?
Jon and Steven, what hardware do you have?

I'm running some fairly old hardware on this

particular server. It's a

quoted

dual P3 1Ghz.

After running a repair on /dev/md2, I now see:
# cat /sys/block/md2/md/mismatch_cnt
1536

Again, no smart errors, nothing to indicate a disk

problem at all :(

quoted

As this really keeps killing the machine and it is a

live system - the

quoted

only thing I can really think of doing is to break the

RAID and just rsync

quoted

the drives twice daily :\

the same happened with many people. and we all hate it
since it cause a 
huge load at all weekend on most of our servers:-(
according to redhat it's not a bug:-(

-- 
   Levente         
               
     "Si vis pacem para bellum!"
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Well i am running a Semperon based desktop system that has 4 in built sata and 2 IDE, and 2 PCI-E controller cards exposing 2 sata ports each.

I have off the IDE 2 320GB HDD's that is split across 3 md's boot/swap/main. Only the Main is 'check'ed/repaired. Very rarely have a problem here!

On the Sata's I have 7 HDD's of varying size(4x500, 2x750, 1x1TB) and makes(Samsung, Hitachi, Seagate) strung together to form a now raid6 (raid5 until a couple of weeks ago). On top of that i have a VG split into ~6 LV's and in some of those i have mount SquashFS filesystems. until i moved the drive order around at the weekend for access issues. I didn't really have any problems - except the occasional issue - I scrub it weekly currently.

BUT I have only just converted from raid5 to 6 and probably not run that many checks since so it could be related to that!




      
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