Using eSATA on HP Compaq dc7900 Business PCsįigure 1 Bandwidth comparison for external hard drive interfacesīIOS / Software / Hardware Considerationsįigure 2 Maximum eSATA speed and SATA emulation in F10 Setupģ. See case #4 for enhancing Windows Vista with the Intel AHCI driver. The system is AHCI and eSATA hot-plug capable. The Windows Vista native AHCI driver supports eSATA hot-plugging. For customers who do not use the pre-installed HP image, there are several scenarios for using AHCI mode and eSATA hot-plug capability: 1. The system can be freely switched to and from IDE to AHCI. The Windows XP or Vista image that ships with the HP Compaq dc7900 Business PC has the Intel AHCI driver (iastor.sys) pre-loaded. In addition, the system must be set to SATA emulation mode of AHCI or RAID in BIOS (See "BIOS Interface" on page 3). However, eSATA hot-plug support does require an AHCI driver with hot-plug support to be loaded in the operating system. The eSATA port does not require a driver to function. The eSATA port can be hidden in F10 Setup at Security > Device Security > eSATA.
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