Apple PowerBook G3 User Manual
Page 59
Connecting Additional Equipment
59
Connecting SCSI Devices
You can attach up to seven SCSI devices, including hard disk drives, CD-ROM drives, and
scanners, to your computer by linking them together in a chain that starts at your computer’s
SCSI port.
To connect a SCSI device to your Macintosh PowerBook, you need an Apple HDI-30 SCSI
System Cable or equivalent. This cable is light gray, is about 19 inches long, and has 29 pins
(one “missing” pin) on the end that connects to the PowerBook.
Refer to the manuals that came with your SCSI devices for instructions on installing any
necessary software, setting SCSI ID numbers, and connecting SCSI cables and SCSI
terminators. The illustrations on the next page briefly describe the proper positioning of
SCSI terminators. A SCSI chain of devices must include a terminator on the first and last
devices in the chain (but nowhere else in the chain). Some devices include internal
terminators. Your Macintosh PowerBook is internally terminated.
The names and the part numbers of the cables mentioned in this chapter are as follows:
Where to add cable terminators when connecting a single SCSI device
Type of Connection
Name of Part
Part Number
From your computer to a SCSI device
Apple HDI-30 SCSI System
Cable
M2538**/A
From SCSI device to SCSI device
Apple SCSI Peripheral
Interface Cable
M0207
For SCSI disk mode
Apple HDI-30 SCSI Disk
Adapter Cable
M2539**/A
Warning
When connecting SCSI equipment, always turn off power to all devices in the
chain, including your computer. If you don’t, you could lose information and damage your
equipment.
Terminator
(If this SCSI device has an internal
terminator, omit this external terminator.)
HDI-30 SCSI system cable