[CentOS] 3Ware 9550SX and latency/system responsiveness

>Hmm, how are you creating your ext3 filesystem(s) that you test on? 
>Try creating it with a large journal (maybe 256MB) and run it in 
>full journal mode.

The filesystem was created during the initial CentOS installation, 
and I've tried it with ext2 which made no difference.

S.