I have not used RAID controller boards to date since I have relied on the built in RAID on the motherboards. Thanks to the informative message Byron, I realize the deficiencies of doing RAID 1 this way, especially now that the builtin is out of date with Kernel used by Centos. I have 4 ATA drives that were configured in two pairs. I assume that I need a 3Wave controller that has 4 ports like the 7506-4LP...correct? Do I need to install any software during the installation of Centos? Todd -- Ariste Software 200 D Street Ext Petaluma, CA 94952 (707) 773-4523 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20050909/19eabf4e/attachment-0003.html>