On Tue, Dec 1, 2009 at 11:06, RedShift <redshift at pandora.be> wrote: > Jancio Wodnik wrote: >> W dniu 30.11.2009 14:08, Farkas Levente pisze: >>> hi, >>> it's been a few weeks since rhel/centos 5.4 released and there were many >>> discussion about this new "feature" the weekly raid partition check. >>> we've got a lot's of server with raid1 system and i already try to >>> configure them not to send these messages, but i'm not able ie. i >>> already add to the SKIP_DEVS all of my swap partitions (since i read it >>> on linux-kernel list that there can be mismatch_cnt even though i still >>> not understand why?). but even the data partitions (ie. all of my >>> servers all raid1 partitions) produce this error (ie. ther mismatch_cnt >>> is never 0 at the weekend). and this cause all of my raid1 partitions >>> are rebuild during the weekend. and i don't like it:-( >>> so my questions: >>> - is it a real bug in the raid1 system? >>> - is it a real bug in my disk which runs raid (not really believe since >>> it's dozens of servers)? >>> - the /etc/cron.weekly/99-raid-check is wrong in rhel/centos-5.4? >>> or what's the problem? >>> can someone enlighten me? >>> thanks in advance. >>> regards. >>> >>> >> Hi. I have this problem on my 2 servers (Both Centos 5.4) - every >> weekend my raid1 set is rebuild, because >> >> mismatch_cnt is never 0 at the weekend. What is really going on ? My 1TB disk whith raid1 are rebuild every weekend. >> > > They aren't being rebuilt, they are being checked if the data on the RAID disks are consistent. There are various reasons why mismatch_cnt can be higher than 0, for example aborted writes. Generally it's not really something to be worried about if you have for example a swap partition in your RAID array. If you do a repair and then a check the mismatch_cnt should reset to 0. the mismatch_cnt is not 0 so then automatically checked and repaired on all weekend. and this is not a swap partition as i wrote there are the /srv partitions with only data. -- Levente "Si vis pacem para bellum!"