[CentOS] Problems with 2.3TB disk

Hi Guys,

I have a server running CentOS 4.2 with a 2.6.9-22EL-smp kernel.

The system contains a 2.3 TB RAID 5 array.  There is a 20GB root partition 
with the remainder of the drive configured one large LVM volume. (/u0)

I have installed Veritas Netbackup on the server and am running a few 
tests.  Small backups and restores work just fine.

When I run a larger backup (500MB) and store the backup file on /u0/vrts 
the files within the backup cannot be restored.  I thought at first this 
was a Veritas problem but have also discovered...

I cannot do any of the following to the backup file: Use cat, dd or cp to 
copy the file.  The first part of the file aproximately 24MB will copy and 
then I get the error message: Input/output error

Checking dmesg shows:
dm-0: rw=0, want=31933816664, limit=4838391808
attempt to access beyond end of device
dm-0: rw=0, want=32472792952, limit=4838391808
attempt to access beyond end of device
dm-0: rw=0, want=33011769240, limit=4838391808
attempt to access beyond end of device
dm-0: rw=0, want=33550745528, limit=4838391808
attempt to access beyond end of device
dm-0: rw=0, want=34089721816, limit=4838391808

How do I access the files in question?

Any suggestions or enlightment would be greatly apreciated.

Shawn