Server keeps shutting down ! (FC3)

[Kim Lux]

This is what I get from the drive when its mounted via the USB drive
caddy on another machine:

#/sbin/fsck /dev/sda
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
Couldn't find ext2 superblock, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sda

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>

# /sbin/fsck /dev/sda1
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
/boot: clean, 67/26104 files, 34101/104388 blocks

]# /sbin/fsck /dev/sda3
fsck 1.39 (29-May-2006)
e2fsck 1.39 (29-May-2006)
/: clean, 506434/24821760 files, 41973788/49634825 blocks

The first error message is exactly the same as what happens on the
server.  Why does fsck /dev/sda fail, but fsck /dev/sda1 and
fsck /dev/sda3 work ?

Does this drive problem have something to do with the server shutting
down ?

-- 
Kim Lux,  Diesel Research Inc.