A SCSI device is any product—including hard disk drives, CD-ROM drives,
scanners, and printers—that connects with your computer by means of a
standard electronic interface called Small Computer System Interface (SCSI).

Connecting SCSI devices

You can attach up to six SCSI devices to your computer by linking them
together in a chain that starts at your dock’s SCSI port.
There is a SCSIport on the PowerBook Duo Dock and the PowerBook Duo
MiniDock. (There is no SCSI port on the PowerBook Duo.) The SCSIport
looks like this:
To connect a SCSI device to the SCSI port on your PowerBook, you need an
Apple HDI-30 SCSI System Cable.
SCSI port icon
SCSI port
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9Using SCSI Devices
Refer to this chapter for information
about connecting SCSI devices
and using your PowerBook Duo
as a SCSI disk.