Installing Drives 3-5
&RQQHFWLQJ'ULYHV
When installing a drive, you connect two cables—a DC power cable and an interface
cable—to the back of the drive.
The DC power cable comes from the power supply and contains a 4-pin connector
that is keyed to avoid incorrect insertion. Do not force two connectors toge ther if they
do not fit properly. Your drive’s power input connector (to which you connect the DC
power cable) resembles the connector shown in Figure 3-4.

)LJXUH'&3RZHU&DEOH&RQQHFWRU

The interface cable is attached to an interf ace con nector ei ther on th e sy stem bo ard or
on a controller card. The system board contains a diskette-drive interface connector
(labeled “FLOPPY”) and two EIDE interface connectors (a primary one labeled “PRI
IDE” and a secondary one labeled “SEC IDE”). Connect EIDE hard-disk drives to the
primary connector; connect EIDE devices such as CD-ROM drives or tape drives to
the secondary connector.
The connectors on the interface cables are either header connectors or card-edge
connectors, as shown in Figure 3-5. Both types of connectors are usually keyed for
correct insertion.
Header connectors have a blocked hole on the cable connector that m atches a miss-
ing pin on the interface connector.
Card-edge connectors have a notch in the interface connector.
power input
connector
DC power cable