Asus RS704DA-E6/PS4 - Manual (Page 111)

ASUS RS700DA-E6/PS4, RS704DA-E6/PS4 6-3
6.1.3 Setting the RAID item in BIOS
You must set the RAID item in the BIOS Setup before you can create a RAID set
from SATA hard disk drives attached to the SATA connectors supported by
AMD SP5100 chipset. To do this:
1. Enter the BIOS Setup during POST.
2. Go to the Main Menu > Storage Configuration, then press <Enter>.
3. Set SATA Port1-4 to [RAID] and SATA Port5-6 will be set to [RAID] too.
4. Press <F10> to save your changes and exit the BIOS Setup.
Refer to Chapter 5 for details on entering and navigating through the BIOS
Setup.