Re: What to do when repair does not fix mismatch_cnt to 0 (2.6.25.1)?

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On Sun, May 11, 2008 at 7:39 AM, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote:
> p34:~# cat /sys/block/md3/md/mismatch_cnt
> 256
>
> p34:~# echo repair > /sys/block/md3/md/sync_action
>
> .. wait awhile ..
>
> md3 : active raid5 sdl1[9] sdk1[8] sdj1[7] sdi1[6] sdh1[5] sdg1[4] sdf1[3]
> sde1[2] sdd1[1] sdc1[0]
>      1318680576 blocks level 5, 1024k chunk, algorithm 2 [10/10]
> [UUUUUUUUUU]
>      [=================>...]  resync = 85.0% (124634296/146520064)
> finish=7.9min speed=46113K/sec
>
> .. done ..
>
> md3 : active raid5 sdl1[9] sdk1[8] sdj1[7] sdi1[6] sdh1[5] sdg1[4] sdf1[3]
> sde1[2] sdd1[1] sdc1[0]
>      1318680576 blocks level 5, 1024k chunk, algorithm 2 [10/10]
> [UUUUUUUUUU]
>
> now check again:
>
> p34:~# cat /sys/block/md3/md/mismatch_cnt
> 256
> p34:~#
>
> # uname -r
> 2.6.25.1
>
> Usually a reboot will take care of it but I would like to know the root
> cause of it and why repair does not fix it?
>

Because of this:
http://marc.info/?l=linux-raid&m=120976366020963&w=2

--
Dan
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