Seagate 3TB 5-drive Raid5 array using md in Linux

System:

Intel Core i7-960 / Asus P6X58D-E
24GB RAM, 5xST3000 drives attached to ICH10R controller in AHCI Mode
Ubuntu 12.04 Native O/S

Summary: ~475MB/s write, ~660MB/s read

bonnie++ output:

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -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
orca         48208M   800  97 476668  32 255886  19  3061  68 661635  17 739.9  11
Latency             15384us     301ms    1374ms   11351us     127ms     164ms
Version  1.96       ------Sequential Create------ --------Random Create--------
orca                -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16 31454  26 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
Latency               311us     334us     370us     180us      63us     637us
1.96,1.96,orca,1,1367315365,48208M,,800,97,476668,32,255886,19,3061,68,661635,17,739.9,11,16,,,,,31454,26,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,15384us,301ms,1374ms,11351us,127ms,164ms,311us,334us,370us,180us,63us,637us