My uncle dropped off his XP & his comp with me asking me to reformat it, after first backing up all his data. So I did, but his PC uses 2 Sata drives seen as ONE, putting the XP disc in & booting it up seemed normal but it showed NO drives. Neither did the Bios. The 2 Sata drives that make up 1 uses RAID that is detected after the BIOS. What can I do to format & put a fresh copy of XP on it?