On Wed, 7 Jan 2009, stephan sperber wrote:
Hello everybody!
I have a little trouble in getting the raid5 up and running again.
What has happened so far:
1. Booting the System
2. Ide cable had some troubles so 2 disks went "mad" during boot and raid
couldn't get assembled.
(/dev/sda4 /dev/sdb2)
3. I forced poweroff because system wasn't responsible due to ATA connection
problems.
4. after reboot the raid5 got up again, were clean, but attempted a resync.
5. during the resync the cable had troubles again, so those 2 devices were
marked as spare.
6. i forced a poweroff again and reseated the cable.
7. I booted again but now all devices of the raid were marked as spare.
Is there a possibility to get the raid active without dataloss?
Here some infos:
cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
[raid10]
md1 : inactive sdc2[2](S) sdb2[1](S) sda4[0](S)
709140864 blocks
unused devices: <none>
mdadm --detail /dev/md1
mdadm: md device /dev/md1 does not appear to be active.
Thx in advance
Stephan
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Example (use your disks obviously):
# mdadm --assemble --force /dev/md3 /dev/sd[c-l]1
If that does not work, you can use Neil's advice from another thread:
Your only option at this stage is to re-create the array with the best
devices. Create it will one device missing so that it won't try a
resync.
e.g.
mdadm -C /dev/md0 -l5 -n5 /dev/hde1 /dev/hdg1 /dev/hdi1 missing /dev/sda1
You would want -C /dev/md1 -l5 -n3 and then specify only two of the disks
with one "missing"
See if this does it for you?
Justin.
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