[CentOS] 3Ware ext3 performance with CentOS 5

Oddly enough, the performance of a 3Ware 9550SX controller seems to have 
improved when switching from 64-bit to 32-bit CentOS 5.  This is a RAID0 
device with 8 x 500gig barracudas and the noatime and data=writeback 
tweaks to that device in /etc/fstab.  It's also quite a bit better than 
results on the same machine using CentOS 4.4 (64-bit).  This partition 
is used to store scratch data consisting of large uncompressed video 
files so the fast block reads/writes are a real help.  Nice job fellas!

[localhost data]$ /usr/sbin/bonnie++ -f
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version  1.03       ------Sequential Output------ --Sequential Input- 
--Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- 
--Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  
/sec %CP
localhost.locald 4G           269292  97 182099  64           474707  72 
676.3   1
                    ------Sequential Create------ --------Random 
Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- 
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  
/sec %CP
                 16 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ 
+++++ +++
localhost.localdomain,4G,,,269292,97,182099,64,,,474707,72,676.3,1,16,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++