You have 2 failed drives? RAID5 only supports 1 failed drive. Have you tested the drives to determine if they are good? Example: dd if=/dev/sdf of=/dev/null bs=64k If you can find enough good drives, use the force option on assemble. But don't include any disks that don't have 100% of the data. A spare that did a partial re-build is not good to use at this point. So, if your array had 10 disks, you need to find 9 of them that are still working. Guy -----Original Message----- From: Jon Lewis [mailto:jlewis@xxxxxxxxx] Sent: Tuesday, August 31, 2004 5:27 PM To: Guy Cc: linux-raid@xxxxxxxxxxxxxxx; aaron@xxxxxxxxxxx Subject: RE: raid5 won't resync On Tue, 31 Aug 2004, Guy wrote: > I think what you did should work, but... > I have had similar problems. > Try again, but this time don't include any spare disks, or any other disks. > Only include the disks you know have the data. > Or, just list the disks on the command line. # mdadm --assemble /dev/md2 /dev/sdc1 /dev/sdm1 /dev/sdf1 /dev/sde1 /dev/sdd1 /dev/sdg1 /dev/sdk1 /dev/sdj1 /dev/sdi1 mdadm: /dev/md2 assembled from 4 drives and 1 spare - not enough to start the array. I've left sdl1 and sdn1 out of the above as they're the failed drive and the partially rebuilt spare. I see a pattern that could explain why mdadm thinks there are only 4 drives. From mdadm -E on each drive: sdc1: Update Time : Tue Aug 31 03:47:27 2004 sdd1: Update Time : Tue Aug 31 03:47:27 2004 sde1: Update Time : Tue Aug 31 03:47:27 2004 sdf1: Update Time : Tue Aug 31 03:47:27 2004 sdg1: Update Time : Mon Aug 30 22:42:36 2004 sdi1: Update Time : Mon Aug 30 22:42:36 2004 sdj1: Update Time : Mon Aug 30 22:42:36 2004 sdk1: Update Time : Mon Aug 30 22:42:36 2004 sdl1: Update Time : Tue Jul 13 02:08:37 2004 sdm1: Update Time : Mon Aug 30 22:42:36 2004 sdn1: Update Time : Mon Aug 30 22:42:36 2004 Is mdadm --assemble seeing that 4 drives have a more recent Update Time than the rest and ignoring the rest? ---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________ - 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
