[cccompton]

Just to get more info, try checking one of the logical volumes on the disk:

# fsck /dev/fslv00

If you get output like following it doesn't look good:

****************
The current volume is: /dev/fslv00
fsck: 0507-018 Superblock is corrupt and cannot be repaired.
Both primary and secondary copies are corrupt. Cannot continue.
fsck: 0506-042 Execute module "/sbin/helpers/jfs2/fsck64" failed.

You can also check each superblock as follows:

# lquerypv -h /dev/fslv00 8000 100 # try primary superblock
# lquerypv -h /dev/fslv00 F000 100 # try secondary superblock

A healthy disk will have output something like the following:

00008000 4A324653 00000001 00000000 43067023 |J2FS........C.p#|
00008010 00000000 00000000 00000000 00006461 |..............da|
00008020 74613237 00000000 00000000 00000000 |ta27............|
00008030 00000000 00000000 00000000 017FFB68 |...............h|
00008040 00001000 0000000C 00000200 00000009 |................|
00008050 00000003 00008000 00020100 00000001 |................|

If there is no data the disk is corrupted and you will need to recover using your well-documented and tested recovery procedures.

You should probably get IBM support to walk you through this if you value the data on the system.