Compaq dc7900 Using eSATA on HP Compaq dc7900 Business PCs
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- Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 1
Using eSATA on HP Compaq dc7900 Business PCs Introduction 2 Benefits of eSATA 2 BIOS / Software / Hardware Considerations 3 BIOS Interface 3 Software Drivers 5 Hardware 8 Limitations 10 1 - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 2
Serial Advanced Technology Attachment) technology. Both the HP Compaq dc7900 Business PC Small Form Factor (SFF) and Convertible Minitower (CMT) form factors have full eSATA support different external storage device interfaces. Figure 1 Bandwidth comparison for external hard drive interfaces 2 - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 3
/ Software / Hardware Considerations BIOS Interface The system BIOS enumerates eSATA devices as removable storage 1.5Gbps or 3.0Gbps can be set in F10 Setup at Storage > Storage Options > Max eSATA Speed. Default is 1.5 Gbps. The SATA controller and the eSATA device automatically negotiate the - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 4
previous HP Compaq dc7xxx Business PCs, which had a default SATA emulation mode of IDE (legacy). While the eSATA port works in IDE mode, hot-plug functionality is not available. The SATA emulation mode must be set to AHCI or RAID for hot-plug support. In addition, a hot-plug capable AHCI driver must - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 5
with hot-plug support to be loaded in the operating system. In addition, the system must be set to SATA emulation mode of AHCI or RAID in BIOS (See "BIOS Interface" on page 3). The Windows XP or Vista image that ships with the HP Compaq dc7900 Business PC has the Intel AHCI driver (iastor.sys) pre - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 6
support so either the native AHCI driver is used or the Intel AHCI driver can be added. 3. Enhancing existing Windows XP images from IDE mode. Corporate IT may be able to update to insert mass storage drivers into an offline Microsoft Windows XP image. For more information and instructions on OPK or - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 7
update an existing Windows Vista image that was created in IDE mode to use the Intel AHCI driver. The process requires the Intel AHCI drivers to that installs, uninstalls, configures, and updates features and packages for Windows Vista. For more information and instructions on OPK or PKGMGR.EXE, go - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 8
match what is in the INF or the AHCI driver will fail and the system will not boot. Hardware Both SFF and CMT form factors of HP Compaq dc7900 Business PCs have an eSATA connector on the system board. The following table provides the color coding for the SATA connectors: SATA Connector SATA0 SATA1 - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 9
Figure 5 Internal eSATA cable and bracket Figure 6 eSATA connector and bracket on an HP Compaq dc7900 SFF 9 - Compaq dc7900 | Using eSATA on HP Compaq dc7900 Business PCs - Page 10
Figure 7 eSATA hard drive connecting to the eSATA bracket port Limitations eSATA hot-plugging is available only with BIOS and operating system support. eSATA 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,
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Using eSATA on HP Compaq dc7900 Business PCs
Introduction
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Benefits of eSATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
BIOS / Software / Hardware Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
BIOS Interface
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Software Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Hardware
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Limitations
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