... I see you are running bonnie++ version 1.93c. The numbers it reports are very different from version 1.03a, which is the one everyone runs - can you post your 1.03a numbers from bonnie++? ... Luke, Thanks for the pointer. Here's the 1.03 numbers, but at the moment I'm only able to run them on the 6 disk RAID 5 setup (128k stripe, writeback enabled since the Perc5 does have a battery backed cache). bonnie++ -d bonnie -s 1000:8k 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 1000M 155274 95 265359 44 232958 52 166884 99 1054455 99 +++++ +++ ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 +++++ +++ +++++ +++ +++++ +++ 30550 88 +++++ +++ +++++ +++ ,1000M,155274,95,265359,44,232958,52,166884,99,1054455,99,+++++,+++,16,+ ++++,+++,+++++,+++,+++++,+++,30550,88,+++++,+++,+++++,+++ - Bucky