Installing Drives in the External Bays 8-105
A header connector is usually keyed by the omission of one
of its pins with the corresponding hole filled in on the cable
connector, as shown in Figure 8-5.
DC Power Cables
Figure 8-6 identifies the types of DC power cables coming
from the computer’s power supply. Before connecting a
drive to a power cable, refer to Figure 8-6 to identify the cor-
rect cable connector to use for the drive.
Figure 8-6. DC Power Cable Connectors
Installing Drives in the External
Bays
The external drive bays (Figure 8-7) can hold up to three
half-height devices. A diskette drive is standard in the top
bay and a CD-ROM drive is standard in the middle bay. The
lower bay can be used for a SCSI drive or a drive that
requires its own controller card and interface cable, such as
some kinds of tape drives.
Figure 8-7. Drives in the External Bays
CAUTION: When connecting an interface cable,
match the colored strip to the pin-1 end of the
connector. Reversing the cable prevents the drive
from operating and could damage the controller,
the drive, or both.
system board
connector
5.25-inch drive
connector 3.5-inch drive
connector
system board
connector
drive in top bay
drive in middle bay
empty lower bay
press
(two places)