You are not logged in.
Hi
I have a server with 6 sata-drives in a raid5 configuration. One of the drives dropped from the array a few weeks ago, rendering it working, but without any security (e.g. U_UUUU). I rebooted the server, added the drive that dropped from the raid, and the rebuilding went fint. Until it reached around 60-80% recovery. At thgat point, another drive dropped from the array, rendering the whole array useless (U_UUU_)
Luckily, i know exactly which drives that contained the correct datasets before i started to rebuild the raid.
Some commands i ran before attempting to rebuild the array:
# clvn@enigma: cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdh1[2] sdc1[5] sdd1[3] sdg1[6](F) sdb1[0] sde1[4]
7325679680 blocks level 5, 64k chunk, algorithm 2 [6/5] [U_UUUU]
unused devices: <none>
# clvn@enigma: for i in {c,d,h,b,e}; do echo /dev/sd"$i"1:; sudo smartctl -a /dev/sd"$i"1 | grep Serial; done
/dev/sdc1:
Serial Number: WD-WCAVY2742388
/dev/sdd1:
Serial Number: 6XW059BH
/dev/sdh1:
Serial Number: WD-WMAVU1395536
/dev/sdb1:
Serial Number: S1XWJ9CZ805937
/dev/sde1:
Serial Number: WD-WMAVU1398710
Anyone have any suggestions? I haven't tried anything yet, except a reboot to see if that would help. And some googleing
Last edited by clvn (2011-02-10 16:29:58)
Offline
Exactly my story; last year a disk failed in rebuilding raid5 array. Unfortunately, we've lost the data (modulo backups); data recovery company worked on the array for a month and presented us with incomplete file listing and price tag so high, that company did not decide to buy full recovery. One advice: if you want to do anything by yourself, make images of all drives, then put drives in safe, quiet place and work on copy of the images.
Offline
Thanks for the info briest, even though its not promising. I'll keep this thread updated.
Offline
This is great. I forgot how much i love mdadm.
sudo mdadm --assemble /dev/md0 --force /dev/sdb1 /dev/sde1 /dev/sdg1 /dev/sdc1 /dev/sdd1 (the /dev/sd*-devices are the five out of six drives that i knew contained the whole dataset)
*mdadm's magic powers goes here, schwop*
And everything seems fine.
# clvn@enigma: cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdb1[0] sdc1[5] sde1[4] sdd1[3] sdg1[2]
7325679680 blocks level 5, 64k chunk, algorithm 2 [6/5] [U_UUUU]
unused devices: <none>
Offline