Hi,
I have a RAID5 array that has died and I need help recovering it.
Somehow two of the four partitions in the array have failed. The
server was completely dead, and had very little recognizable
information on the console before it was rebooted. I believe they were
kernel messages, but it wasn't a panic.
I'm able to read data from all four disks (using dd) but can't figure
out how to try and reassmble it. Here is some information I've
obtained by booting from a rescue CDROM and the mdadm.conf from
backup.
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] [linear]
md1 : inactive sda2[0] sdd2[4](S) sdb2[1]
205820928 blocks super 1.1
md0 : active raid1 sda1[0] sdd1[3] sdc1[2] sdb1[1]
255988 blocks super 1.0 [4/4] [UUUU]
# mdadm --add /dev/md1 /dev/sdd2
mdadm: Cannot open /dev/sdd2: Device or resource busy
# mdadm --run /dev/md1
mdadm: failed to run array /dev/md1: Input/output error
I've tried "--assemble --scan" and it also provides an IO error.
mdadm.conf:
# mdadm.conf written out by anaconda
MAILADDR root
AUTO +imsm +1.x -all
ARRAY /dev/md0 level=raid1 num-devices=4
UUID=9406b71d:8024a882:f17932f6:98d4df18
ARRAY /dev/md1 level=raid5 num-devices=4
UUID=f5bb8db9:85f66b43:32a8282a:fb664152
Any ideas greatly appreciated.
Thanks,
Alex
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