AHCI and RAID on HP Compaq Elite 8000, 8100, and 8200 Business PCs

3. Reboot the computer.

4. Enter F10 Setup and change SATA Emulation mode to AHCI.

5. Reboot the computer into Windows XP.

_GTF Support (HP 8000 and 8100 Business PCs only)

HP Elite 8000 and 8100 Business PCs support _GTF (Get Task File) AHCI control

method when in AHCI mode. The Intel AHCI driver needs a registry key to enable

_GTF for each port. This registry key has been added with the Windows XP, Vista

or Windows 7 image that ships with HP Elite 8000 a n d 810 0 Business PCs.

For customers using their own image, the following key is required:

HKLM\System\CCS\Services\iaStor\Parameters\Port[X]

name:GTF

value: 0=disabled 1=enabled

…where [X] represents the physical AHCI port of the connected drive to be _GTF

enabled. To enable _GTF support for all ports, set this value under each port (Port0,

Port1...PortN).

Hardware

The HP Elite 8000-series Business PCs uses Intel chipsets that support an AHCI

capable Host Bus Adapter (HBA). This HBA supports ATA and ATAPI devices in

both PIO and DMA modes with NCQ as long as the device supports NCQ.

All hard drives shipped with the HP Elite 8000-series Business PCs are NCQ

capable.

Limitations

NCQ functionality requires both HBA and hard drive to support it. Non-NCQ

capable hard drives will not see any performance benefits even though the HBA is

NCQ capable.

Hot-plugging is not possible in an operating system without an AHCI driver that

supports hot-plugging, such as DOS, Windows 9x, Windows NT4.0, and older

versions of Linux.

Changing AHCI to IDE Mode through the HP Replicated

Setup Utility

Multiple AHCI systems can be reverted back to IDE mode using the HP Replicated

Setup Utility. This utility allows for system BIOS settings to be replicated and

distributed throughout an enterprise. The procedures and information about how to

obtain the Replicated Setup Utility are described in the HP white paper “Business

Desktop UEFI BIOS Tools” available at