[Gloucs] Help diagnose crash please? Suspected hard drive failure, but which drive?

[Andrew Oakley]

Can someone help me diagnose the following crash please?

http://aoakley.com/misc/crash-20080130.jpg

I strongly suspect that this means at least one of my four hard drives 
has failed, but the question is, if so which one? I have two pairs of 
RAID1 mirrors, both with ext3 filesystems (hence the kjournald errors, I 
think).

Upon reboot, everything either works fine, or I see the hda1/hdc1 mirror 
being rebuilt in /proc/mdstat , so my suspicion is on either hda or hdc. 
The system then fails randomly in a similar manner in the next minutes 
or hours.

I'm using Ubuntu 6.06.02 LTS on a home-built Athlon XP CPU with mdadm 
software RAID. No GUI desktop was running at the time.

Any help much appreciated,

-- 
Andrew Oakley