On Sun, May 1, 2011 at 7:50 AM, Brad Campbell <lists2009@xxxxxxxxxxxxxxx> wrote: > On 01/05/11 06:51, Mark Knecht wrote: >> >> On Wed, Apr 27, 2011 at 10:31 PM, Wolfgang Denk<wd@xxxxxxx> Âwrote: >>> >>> Dear Phil Turmel, >>> >>> In message<4DB8BEFE.3020009@xxxxxxxxxx> Âyou wrote: >>>> >>>> Hmmm. ÂSince its not swap, this would make me worry about the hardware. >>>> ÂHave you considered shuffling SATA port assignments to see if a pattern >>>> shows up? ÂAlso consider moving some of the drive power load to another PS. >>> >>> I do not think this is hardware related. ÂI 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    Â/        ext4 errors=remount-ro,commit=30,noatime > 0 1 > /dev/md6    Â/raid0     Âext4  Âdefaults,commit=30,noatime   Â0 1 > /dev/md4    Â/home      ext4  Âdefaults,commit=30,noatime   Â0 1 > /dev/md3    Ânone      Âswap  Âsw > > 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 > Brad, Thanks very much for sharing the data and your experiences with this. I'll simply ignore it on the RAID1's from now on. Cheers, Mark -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
