Asus TS300-PA4 - Manual (Page 167)

ASUS TS300-E3/PA4 & PS4 6-39
6. When prompted, use the keyboard to assign a name for the RAID 1 set, then
press <Enter>.
7. If you want to make the array
bootable, select Yes from the menu,
then press <Enter>.
8. When prompted to create the RAID 1
set, select Yes, then press <Enter>.
The utility erases all data from the selected hard disk drives. Make sure to
backup all important data before creating a RAID set.
9. When a confirmation dialogue box
appears, select Yes, then press
<Enter>.
10. The utility builds the RAID 1 set and displays a progress bar at the center of
the screen. Press <Esc> if you want to stop the building process.