Asus P5MT - Manual (Page 143)

A S U S P 5 M T S e r i e s A S U S P 5 M T S e r i e s A S U S P 5 M T S e r i e s A S U S P 5 M T S e r i e s A S U S P 5 M T S e r i e s 5 - 4 3 5 - 4 3 5 - 4 3 5 - 4 3 5 - 4 3
2. After selecting the drives, press <Esc>.
3. When prompted, select <Save changes, then exit this menu>, then
press <Enter> to create the RAID 1 set.