Apple Workgroup Server 9150/120 - Manual (Page 52)

Note: Your Workgroup Server 9150 has built-in SCSI termination, so be sure
that there are no resistor packs on the drive(s) you are installing.
To install an internal hard disk drive:
1 Shut down the server, disconnect any attached cables (including the power cord) and
discharge static electricity by turning the lock key switch to the “secure” position and
then back to the “on” position.
2 Attach a grounding wrist strap and be sure to use a static mat.
3 Remove the cover from the server.
4 Place the server on its side, with the drive bracket assembly screws visible.
36 Chapter 3 / Expanding Your Server and Connecting Other Equipment