Filter
Top Products
Connecting external SCSI devices, such as a scanner or external hard disk
Your computer has a port for connecting devices that use the Small Computer
System Interface (SCSI, pronounced “skuh-zee”). SCSI devices commonly
used with the Macintosh include hard disk drives, CD-ROM drives, scanners,
tape or cartridge backup drives, and some printers. The SCSI port permits
high-speed communication between the computer and the device. The SCSI
icon appears to the left of the port on the computer’s back panel.
You can connect SCSI devices to the SCSI port in a chain. The first device in
the chain plugs into the SCSI port; the second device plugs into the first
device, and so on. You can attach up to six external SCSI devices to the SCSI
port. All SCSI devices connected to this chain must have their own unique ID
number (no two devices can use the same ID number). If your computer came
with a CD-ROM drive installed, this drive is also part of the SCSI chain and
uses SCSI ID number 3. The computer itself (the main logic board inside it)
uses SCSI ID number 7.
IMPORTANT
The material that follows—“Before You Connect a Device” and
“Connecting a SCSI Device”—contains general instructions for attaching
SCSI devices to your computer. Make sure you also follow the specific
instructions that came with the SCSI device you are connecting to your
Macintosh.
SCSI icon
SCSI port
53
Connecting Equipment and Expanding Your Computer