EXT3-fs error

[glenn]

Hi, Guys - I have a year-old Dell PowerEdge 2650 with PERC-3Di 
hardware RAID and four SCSI drives.  It ran fine for almost a 
year, then a month after reformatting the logical drive and 
installing RHEL-AS3, it gave a file system error and locked up.  
Had to manually reboot, then two weeks later the same thing 
happened.  I'm including the console display below.  Any idea how 
to fix this?  Thanks.   -Glenn.

I/O error: dev 08:05, sector 42360 
I/O error: dev 08:05, sector 42368 
I/O error: dev 08:05, sector 42376 
I/O error: dev 08:05, sector 2137456 
I/O error: dev 08:05, sector 42384 
I/O error: dev 08:05, sector 42392 
I/O error: dev 08:05, sector 42400 
I/O error: dev 08:05, sector 2137456 
I/O error: dev 08:05, sector 42408 
I/O error: dev 08:05, sector 42416 
I/O error: dev 08:05, sector 42424 
I/O error: dev 08:05, sector 2137456 
I/O error: dev 08:05, sector 42432 
I/O error: dev 08:05, sector 42440 
I/O error: dev 08:05, sector 132124688 
EXT-fs error (device sd(8,5)): ext3_readdir: directory #8257537 
contains a hole at offset 0