I am following an article entitled" DIY: Serious speed with Serial ATA" written by Mitt Jones CNET.com where he installs an Adaptec 1210SA and 2 Raptors in a Raid0. Then he uses WD's Data Lifeguard utility to move data from an existing PATA drive to the Raid. I followed this to the letter, installing drivers & setting up the Raid. However when I rebooted after leaving the ACU ( and before attempting any data transfer) the controller would not boot and my array showed only one drive. As soon as I disconnect the Raptors ( new & completely clean) I can boot into windows using the old system. I have checked the controller ( using Adaptec's management software) all connections and downloaded the latest drivers. The error message from the controller say's " bios not installed". I thought the bios was imbedded, what could be stopping it from installing? How can I check if one of the drives is not faulty? The mobo is a Gigabyte GA-81PE1000 Pro2 which has SATA but no raid. Any help would be greatly appreciated. Cheers, Dean.