From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Waldo Subject: Re: Care and feeding of RAID? Date: Tue, 05 Sep 2006 13:09:18 -0400 Message-ID: <44FDAF3E.1090209@waldoware.com> References: <44FD722C.7050608@waldoware.com> <44FD91D1.7090501@maine.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <44FD91D1.7090501@maine.edu> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org Cc: Steve Cousins List-Id: linux-raid.ids Steve Cousins wrote: > Gordon Henderson wrote: > >> On Tue, 5 Sep 2006, Paul Waldo wrote: >> >> >> >>> Hi all, >>> >>> I have a RAID6 array and I wondering about care and feeding >>> instructions :-) >>> >>> Here is what I currently do: >>> - daily incremental and weekly full backups to a separate machine >>> - run smartd tests (short once a day, long once a week) >>> - check the raid for bad blocks every week >>> >>> What else can I do make sure the array keeps humming? Thanks in >>> advance! >>> >> >> Stop fiddling with it :) >> >> I run similar stuff, but don't forget running mdadm in daemon mode to >> send >> you an email should a drive fail. I also check each device individually, >> rather than the array although I don't know the value of doing this over >> the SMART tests on modern drives though... >> >> > > Would people be willing to list their setup? Including such things as > mdadm.conf file, crontab -l, plus scripts that they use to check the > smart data and the array, mdadm daemon parameters and anything else that > is relevant to checking and maintaining an array? > I'm running the mdmonitor script at startup and a sample mdadm.conf > (one of 3 machines) looks like: > > MAILADDR cousins@limpet-gb.umeoce.maine.edu > ARRAY /dev/md0 level=raid5 num-devices=3 > UUID=39d07542:f3c97e69:fbb63d9d:64a052d3 > devices=/dev/sdb1,/dev/sdc1,/dev/sdd1 > > These are SATA drives and except for the one machine that has a 3Ware > 8506 card in it I haven't been able to get SMART programs to do anything > with these drives. How do others deal with this? > Thanks, > > Steve > Excellent idea, Steve. In my crontab, I have this: # Check RAID arrays for bad blocks once a week 30 2 * * Tue echo check >> /sys/block/md0/md/sync_action ; echo "Checking md0 bad blocks" 30 2 * * Wed echo check >> /sys/block/md1/md/sync_action ; echo "Checking md1 bad blocks" I have this in my smartd.conf: /dev/hda -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/hdc -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/hde -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/hdg -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/sda -d ata -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/sdb -d ata -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) /dev/sdc -d ata -H -m root -S on -o on -I 194 -s (S/../.././02|L/../../6/03) My Fedora Core box has this in /etc/init.d/mdmonitor: daemon --check --user=root mdadm ${OPTIONS} where OPTIONS="--monitor --scan -f --pid-file=/var/run/mdadm/mdadm.pid" I have no mdadm.conf. My entire filesystem consists of md0 (/boot) and md1(/). I figure if I have problems and need the file, it won't be available anyway. If I am mistaken, please do let me know! Any other suggestions would be welcomed! Paul