Dell PowerEdge C6145 - Manual (Page 61)

Using the System Setup Program | 61
Option Description
OnChip SATA Channel
(Enabled default) Select this item to enable or disable Onboard SATA
controller.
OnChip SATA Type
(Native IDE default) Native IDE: Native mode.
AMD_AHCI: Use AMD AHCI option ROM.
IDE->AMD_AHCI: No AHCI option ROM, use
AMD AHCI driver (need load driver when install OS,
windows 2008 R2 had native support.)
RAID: Use RAID option ROM.
SATA IDE Combined Mode
(Enabled default) Two SATA (Port 4 and Port 5) share one IDE channel
(could be either Primary or Secondary channel) from
IDE (PATA) controller.
Hard Disk Write Protect
(Disabled default) Select this item to disable/enable device write
protection. This will be effective only if device is
accessed through BIOS.