Help fixing corrupted RAID5 partition

[Paul Howarth]

Reuben D. Budiardja wrote:
> Hello,
> I have a machine running software RAID5 using:
> /dev/hde1
> /dev/hdg1
> /dev/hdi1
> 
> as the RAID partitions. The operating system for the machine is on separate 
> drive /dev/hda.
> 
> After a power failure, RAID failed to start. During boot, it gives me the 
> following message:
> 
> ---
> Starting up RAID devices : raid5 : failed to run raid set md0 
> Checking filesystems
> /boot : clean, ... 
> fsck.ext3 : /dev/md0 :
> The superblock could not be read or does not describe a correct ext2 
> filesystem. If the device is valid and it really contains an ext2 filesystem 
> (and not swap or ufs or something else), then the superblock is corrupt, and 
> you might try running e2fsck with an alternate superblock :
> e2fsck -b 8193 <device> 
> 
> Invalid argument while trying to open /dev/md0 	[Failed]
> ---
> 
> Then it asks for root password for maintenance. After inputting root password, 
> I tried running:
> 
> #> e2fsck -b 8193 /dev/md0
> 
> and I got the same message about corrupt superblock. Running 
> "raidstart /dev/md0" in maintenance mode also give a message that the raid 
> fail to start. Does this mean I loose all my data in the array ? Any hope of 
> recovering some ? 
> 
> I attach my /etc/raidtab bellow. Any help is greatly appreciated. 
> 
> Thanks
> Reuben D. Budiardja
> 
> ------------ /etc/raidtab------------
> raiddev		    /dev/md0
> raid-level		    5
> nr-raid-disks		    3
> chunk-size		    64k
> persistent-superblock	    1
> nr-spare-disks		    0
>     device	    /dev/hde1
>     raid-disk     0
>     device	    /dev/hdg1
>     raid-disk     1
>     device	    /dev/hdi1
>     raid-disk     2

What output do you get from:

# mdadm --detail /dev/md0

Paul.