Dell PowerEdge C6220 II Hardware Owner's Manual page 98

Option
Embedded SATA Controller
(AHCI default)
98 | Using the System Setup Program
Description
Off – Disables the SATA controller. The token applies
to the first on-board SATA controller.
IDE
– Enables the SATA controller. Sets the device
class code as IDE and uses PCI IRQ (referred as Native
mode). This token applies to the first on-board SATA
controller.
AHCI – Enables the SATA controller. Sets the device
class code as SATA and sets up the AHCI BARs and
registers. This token applies to the first on-board SATA
controller.
RAID – Enables the SATA controller. Sets the device
class code as RAID and executes the RAID Option
ROM. This token applies to the first on-board SATA
controller.