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Connecting cables
s Warning: When making SCSI connections, always turn off
power to all devices in the chain. Failure to do so can cause
the loss of information and damage to your equipment.
s
1. Shut down your PowerBook and all SCSI devices in the
chain.
2. To connect the first device, use an Apple HDI-30 SCSI
System Cable.
Attach the smaller end of the cable to your computer’s SCSI
port (marked with the icon
g) and the larger end of the cable
to either SCSI port on the device.
3. To connect the next device, use a SCSI peripheral
interface cable.
Both cable connectors are the same. Attach one connector to
the available SCSI port on the first device, and the other
connector to either SCSI port on the next device.
4. Repeat step 3 for each additional device you want to
connect.
The illustration shows where to add cable terminators.
S Important: The total length of a SCSI chain should not
exceed 20 feet (6 meters). Apple SCSI cables are designed to
meet this restriction. If you are using SCSI cables from
another vendor, check the length of the chain.
S
Once your SCSI devices are connected, always turn them on
before turning on your PowerBook. If you turn the computer on
first, it may not be able to start up, or it may not recognize the
SCSI devices.
If this SCSI device has an internal
terminator, omit this external terminator.
Terminator
HDI-30 cable
If this SCSI device has an internal
terminator, omit this external terminator.
HDI-30 cable SCSI peripheral interface cables
Connecting one SCSI device
Connecting more than one SCSI device
Chapter 13: Expanding Your Computer System 227