On 01/05/11 06:51, Mark Knecht wrote:
On Wed, Apr 27, 2011 at 10:31 PM, Wolfgang Denk<wd@xxxxxxx> wrote:
Dear Phil Turmel,
In message<4DB8BEFE.3020009@xxxxxxxxxx> you wrote:
Hmmm. Since its not swap, this would make me worry about the hardware. Have you considered shuffling SATA port assignments to see if a pattern shows up? Also consider moving some of the drive power load to another PS.
I do not think this is hardware related. I see this behaviour on at
least 5 different machines which show no other problems except for the
mismatch count in the RAID 1 partitins that hold the /boot partition.
root@srv:/server# grep . /sys/block/md?/md/mismatch_cnt
/sys/block/md0/md/mismatch_cnt:0
/sys/block/md1/md/mismatch_cnt:128
/sys/block/md2/md/mismatch_cnt:0
/sys/block/md3/md/mismatch_cnt:41728
/sys/block/md4/md/mismatch_cnt:896
/sys/block/md5/md/mismatch_cnt:0
/sys/block/md6/md/mismatch_cnt:4352
root@srv:/server# cat /proc/mdstat | grep md[1346]
md6 : active raid1 sdp6[0] sdo6[1]
md4 : active raid1 sdp3[0] sdo3[1]
md3 : active raid1 sdp2[0] sdo2[1]
md1 : active raid1 sdp1[0] sdo1[1]
root@srv:/server# cat /etc/fstab | grep md[1346]
/dev/md1 / ext4
errors=remount-ro,commit=30,noatime 0 1
/dev/md6 /raid0 ext4 defaults,commit=30,noatime 0 1
/dev/md4 /home ext4 defaults,commit=30,noatime 0 1
/dev/md3 none swap sw
I see them _all_ the time on RAID1's..
When I configured this system _years_ ago, I did not know any better, so
it's a bit of a mish-mash.
The machine also has a 10 drive RAID-6 and a 3 drive RAID-5. The only
time I've seen mismatches on those is when I used a SIL 3132 controller
and it trashed the RAID-6.
Brad
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