Hi guys.. I'm really stumped on this - I've got an Abit Max3 mobo and am runing 2xWD 74gb Raptors in Raid 0 on the Intel Controller as the main boot drive and 2x250gb WD Sata's on the silicon controller in Raid 1 for back up. This was running fine for a few months until suddenly I lost the back up drive in windows. After much fiddling about in bios by disabling the Intel controller I can get the Silicon BIOS up and see the 2 WD 250's on their in RAID 1 no problem but as soon as I re-enable the 2 raptors it disappears. The Intel bios will come up but the silicon one doesn't Anyone have any clues ? Any help much appreciated as this is driving me mad now.. !