Abit KT7-RAID IDE-Raid with Suse 7.0

Hi! I'm trying to set up a server with suse7 on a Abit KT7-RAID mainboard. I use 2 45Gb harddisks from ibm in raid 1 (mirror) mode. I set up raid 1 in the raid-controllers bios and booted suse7 from the dvd. but yast2 shows a capacity of 7,8 gb instead of 45gb and 2 harddisks. I hoped to find there only one drive with the right size. Has anyone any idea what the problem is and how I can solve it? Do I need a driver? I couldn't find one! Please help me. Greetings, Oliver Kuhl.