Asus NCCH-DLE - Manual (Page 149)

A S U S N C C H - D L E A S U S N C C H - D L E A S U S N C C H - D L E A S U S N C C H - D L E A S U S N C C H - D L E 5 - 3 7 5 - 3 7 5 - 3 7 5 - 3 7 5 - 3 7
6. After you have created the RAID 1 set, press any key to reboot the
system.
During POST, the FastTrak S150 TX4™ BIOS checks and displays the
disk array information.
7. Use the FDISK utility to format the array as a single hard drive.
8. After you have formatted the arrayed drives, install an operating
system (OS). The OS will treat the RAID 1 set as a single drive unit.