Many thanks for the assistance. With the this I should be pointed me
in the right direction. As this now looks like a RAID related versus LVM
issue I'll continue this on the RAID message list. For those interested,
the thread can be found here:
http://marc.info/?l=linux-raid&m=128528502831454&w=2
Once again, thanks
On 09/23/2010 02:12 PM, Luca Berra wrote:
I also don't remember ever seeing /dev/md0p1 before, just a /dev/md0
i guessed as much
root@adam-desktop:~# mdadm --examine --scan --verbose
ARRAY /dev/md0 level=raid5 num-devices=4
UUID=b5e0fcd0:cfadbb04:a5b6f22e:457f47ae
devices=/dev/sde,/dev/sdd,/dev/sdc,/dev/sdb
the above is the wrong md0 using whole disks
this one is the correct one
ARRAY /dev/md0 level=raid5 num-devices=4
UUID=08558923:881d9efd:464c249d:988d2ec6
devices=/dev/sde1,/dev/sdd1,/dev/sdc1,/dev/sdb1
root@adam-desktop:~# mdadm --examine --verbose /dev/sdb
root@adam-desktop:~# mdadm --examine --verbose /dev/sdc
root@adam-desktop:~# mdadm --examine --verbose /dev/sdd
root@adam-desktop:~# mdadm --examine --verbose /dev/sde
you did not dump the partitions, but i guess you couldn't since the
device files disappeared
root@adam-desktop:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5]
[raid4] [raid10]
md0 : active raid5 sde[3] sdb[0] sdc[1] sdd[2]
2930287488 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU]
unused devices:<none>
put
DEVICE /dev/sd?1
ARRAY /dev/md0 level=raid5 num-devices=4 UUID=08558923:881d9efd:464c249d:988d2ec6
into /etc/mdadm.conf (or /etc/mdadm/mdadm.conf, whatever ubuntu places
it) and reboot, you should be able to see your data.
after this ask on linux-raid ml for advice on how to zero the duplicate
superblock.
L.
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