raid not booting

[David Vincent]

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Reinhard Haller wrote:
> Hi,
> 
> this morning my ubuntu box wasn't accessible (no local access, no ssh, 
> no http -- ping worked), so I resetted the server.
> 
> The box didn't boot with the following messages:
> 
> There appears to be one or more degraded RAID devices ...
> 
> md0: incative sdc2[2](S) sdb2[1](S) sdc3[3](S)
> 
> The suggested start with the degraded raid (mdadm -R /dev/md0) gives the 
> following messages:
> 
> mdadm: CREATE user root not found
> mdadm: CREATE group disk not found
> raid5: not enough operational devices for md0 (2/3 failed)
> 
> I tested all drives with the Samsung HD-Utility: they are all 3 fully 
> operational, the partitions are all present!
> 
> Operating system: ubuntu 8.04 kernel: 2.6.24-18-server
> 
> Any suggestions how to get it working again?

***WARNING THIS MAY DESTROY YOUR DATA***

if you are sure your drives/partitions are ok you might try this:

mdadm --create /dev/md0 --raid-devices=3 --level=5 /dev/sda2 /dev/sdb1
/dev/sdc1

...but substitute your own /dev/sd* devices in place of mine.

- -d
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