Asus TS300-E3 - Manual (Page 169)

A S U S T S 3 0 0 - E 3 A S U S T S 3 0 0 - E 3 A S U S T S 3 0 0 - E 3 A S U S T S 3 0 0 - E 3 A S U S T S 3 0 0 - E 3 6 - 4 3 6 - 4 3 6 - 4 3 6 - 4 3 6 - 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.