It looks like this might be part of it:
[  665.305421] 3w-9xxx: scsi0: AEN: WARNING (0x04:0x0036): Verify fixed data/parity mismatch:unit=0.

There are a few interesting notes here:
http://xfs.9218.n7.nabble.com/xfs-fixing-wrong-xfs-size-td6364.html
 -nld

On Nov 27, 2012, at 6:29 PM, Ken Raffenetti wrote:

One of the volumes on bbsto01 failed to mount with a bad superblock
today when the machine was booted.  I ran xfs_check and xfs_repair, the
latter which resulted in this output:

...................................................................................................................................found
candidate secondary superblock...
verified secondary superblock...
writing modified primary superblock
xfs_repair: size check failed
xfs_repair: cannot repair this filesystem.  Sorry.

Any ideas?

--
Ken Raffenetti
Systems Administration Associate
MCS Division - Argonne National Laboratory