[Centos] error on 3ware controller

Hi all,
after an uprade to new kernel 2.4.21-15.0.4.EL on my server appears
a lot of these messages:

EXT3-fs error (device sd(8,17)): ext3_free_blocks: bit already cleared for
block 19268224
EXT3-fs error (device sd(8,17)): ext3_free_blocks: bit already cleared for
block 19268225
EXT3-fs error (device sd(8,17)): ext3_free_blocks: bit already cleared for
block 19268226

I try to rebuild array but at the 12% appears this message
3w-xxxx: scsi2: AEN: INFO: Rebuild started: Unit #0.
3w-xxxx: scsi2: AEN: ERROR: Drive error: Port #0.
3w-xxxx: scsi2: AEN: ERROR: Rebuild failed: Unit #0.

I restarted again the rebuild but
3w-xxxx: scsi2: AEN: INFO: Rebuild started: Unit #0.
3w-xxxx: scsi2: Unit #0: Command (f7545c00) timed out, resetting card.

Ok, I'm a solid Rock, I try to rebuild again but at the 68%
 the rebuild failed again..

Of course I checked RAM and HD and all is OK,
I also changed the IDE cables.

HW proliant ML370 G2 wtih 2 GB RAM
1 controller 3ware escalade 7000-6
2 HD Samsung 160GB RAID1
2 SCSI seagate cheetah 18GB SW RAID1

So, is this a Kernel bug ?

Thank You,
Maurizio