Dell PowerEdge C5220 - Manual (Page 31)

Using the System Setup Program 31
SATA Configuration
Menu Fields Settings Comments
Advanced\SATA Configuration
Embedded SATA
Controller
Off
IDE
AHCI*
RAID Disables the SATA
controller or enables it and
sets the device class code as
IDE/AHCI/RAID. This
token applies to the first
on-board SATA controller.
NOTE: Function available
after BIOS 1.0.4.