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Apple PowerBook G3 User Manual

Page 59

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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