Asus P5LD-MR - Manual (Page 117)

ASUS P5LD-MR 5-19
10. When finished setting the selected logical drive configuration, select
Accept from the menu, then press <Enter>.
11. Follow steps 5 to 10 to configure additional logical drives.
12. When prompted, save the configuration, then press <Esc> to return to
the Management Menu.
After creating the RAID set(s), you must initialize the logical drives. See
5.3.3 Intializing the logical driver for details.