Asus Motherboard P5MT-S - Manual (Page 141)

ASUS P5MT-S 5-41
3. Select RAID-10 (Fault Tolerance, High Performance) from the Select
RAID Type menu, then press <Enter>.
4. Use the arrow keys to select a RAID set member, then press
<SpaceBar> to mark. An X mark appears after the selected HDD.
5. Follow the step 4 to select the other members of the RAID set, then
press <Enter> when finished.
Refer to the Striping/Mirroring Requirements note at the bottom of the
screen to determine the number of hard disk drives required for the
selected RAID type.