Haven't gotten very much time to troubleshoot this yet but here is the setup. Got an Iwill kk266r, 512mb pc133cas 2 crucial, amd athlon 1.2 266fsb 8mb ati video card, iwill sideraid100 pci card, two maxtor diamondmax 60 40gb drives, two maxtor diamondmax 60 60gb drives, antec sx1030b case. I'm building this pc for work but one of the 40gb drives (they are both hooked up as master on the adapter card) seems to be giving me problems. Can I use the drives hooked up to the pci card as boot drive (mirrored) or do I have to use the onboard raid for that? The other two 60gb drives are mirrored on using the onboard raid and are both master also. Am I missing something fairly obvious here? Thanks for any help. Also haven't done any bios updating yet but am going to use the 4/23 with southbridge fix would this help?