Dell Precision WorkStation 420 Service Manual page 34

6. Reinstall the hard-disk drive bracket in the chassis (see
Insert the bracket into the chassis by sliding it in until the tabs snap into place. Rotate the drive door up and toward the chassis until it snaps
securely into place. Be sure to fold down the drive door handle (see
Figure 17. Inserting the Drive Bracket
7. Connect a DC power cable to the power input connector on the back of the drive (see Figure 18).
Check all connectors to be certain that they are properly cabled and firmly seated.
8. Connect one of the device connectors on the EIDE cable to the 40-pin interface connector on the back of the hard-disk drive.
NOTICE: You must match the colored strip on the EIDE cable with pin 1 on the drive's interface connector to avoid
possible damage to your system.
NOTE: Ultra ATA/66 hard-disk drives require an 80-conductor cable to transfer data at full speed. The 80-conductor cable
has a 40-pin connector just like the Ultra ATA/33 cable but has twice as many wires within the cable itself. If you use an Ultra
ATA/33 cable with Ultra ATA/66 hard-disk drives, the drives will transfer data at Ultra ATA/33 speeds.
Figure 18. Attaching Hard-Disk Drive Cables
1 Drive bracket
2 Drive
3 Screws (4)
Figure 17).
Figure 17) so that the front panel can be replaced on the chassis.
1 Chassis drive cage
2 Drive bracket
3 Tabs