Dell OptiPlex Gxi - Manual (Page 28)

1-10 Dell OptiPlex GXi Systems Service Manual
Hard-Disk Drive Options
The following subsections provide service-related information about hard-disk
drive options in the low-profile, midsize and mini tower computers.
Low-Profile Computers
The hard-disk drive assembly (consisting of the hard-disk drive and the hard-
disk drive bracket) is located inside the chassis at the left front of the computer
and is attached to the bottom of the chassis. One EIDE or SCSI 1-inch-high
hard-disk drive can be mounted on the hard-disk drive bracket.
Midsize Computers
The hard-disk drive bracket is located next to the externally accessible drive
bays at the front of the computer. The hard-disk drive bracket can contain either
one or two 1-inch-high EIDE or SCSI hard-disk drives, or one 1-inch-high
EIDE or SCSI hard-disk drive and one 1.6-inch-high EIDE or SCSI hard-disk
drive.
Mini Tower Computers
The hard-disk drive bracket is located beneath the externally accessible drive
bays at the front of the computer. The hard-disk drive bracket can contain either
one or two 1-inch-high EIDE or SCSI hard-disk drives, or one 1-inch-high
EIDE or SCSI hard-disk drive and one 1.6-inch-high EIDE or SCSI hard-disk
drive.
Enhanced Dual-Interface EIDE Subsystem
The EIDE subsystem provides two mode-4, DMA bus-mastered EIDE inter-
faces, each of which can support up to two EIDE devices. The EIDE controller
attaches to the high-speed PCI local bus.
The primary EIDE interface (IDE1) provides support for up to two high-
performance EIDE devices. The computer’s boot drive should be connected to
the primary EIDE interface.
The secondary EIDE interface (IDE2) also provides support for up to two high-
performance EIDE devices, typically EIDE tape drives or CD-ROM drives.
NOTE: The externally accessible drive bays at the front of the computer are
normally used for diskette drives, CD-ROM drives, and/or tape drives. Hard-
disk drives should be installed in the internal hard-disk drive positions
described in “Hard-Disk Drive Options” found earlier in this chapter. For detailed
information about the data storage subsystem, see Chapter 7, “Installing Drives,” in
the Reference and Installation Guide.
Built-In Video Controller
The video subsystem consists of a high-speed, high-resolution video controller
built into the system board. Because the video controller connects to the PCI bus
rather than to the ISA bus, communication between the video subsystem and the