Asus RS120-E4/PA4 - Manual (Page 148)

6-42 Chapter 6: RAID Configuration
6.5 Setting the Boot array with MB BIOS
Setup Utility
1. When creating multi-raid via Intel(r) Matrix Storage Manager RAID, we would
like to assign one array to be the boot drive. The following shows as the
status of current arrays:
2. Re-boot the system and press to enter the Motherboard BIOS Setup
Utility during POST.
3. Go to [Boot] menu —> [Boot Device Priority]. Then, select the desired boot
array and use <+> or <-> key to change the boot device priority.
4. Exit the BIOS Setup Utility and save the changes.