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Connecting a SCSI device

After you read “Before You Connect a SCSI Device” earlier in this chapter, follow the instructions
below. Use these general instructions in conjunction with the more specific instructions that came with
your SCSI device.

1

Shut down your Macintosh.

2

Make sure the SCSI device is switched off.

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Warning  

Do not connect or disconnect any device while the device or your Macintosh is turned on.

Doing so could damage the device, your computer, or both. Do not attach or remove a terminator
while the computer or any device is turned on.    

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3

Use a SCSI cable to connect the device either to the computer’s SCSI port or to the last SCSI device
already in the chain.

Use the thumbscrews and metal clips on the connectors to maintain a tight, reliable connection. Do
not overtighten the thumbscrews.

If you have not already done so, make sure that the SCSI chain is properly terminated, as explained
earlier in this chapter.

4

Turn on all devices in your SCSI chain.

Important  

Always turn on all external SCSI devices connected to your Macintosh before turning on

the computer itself. Otherwise, your computer won’t be able to recognize that the SCSI devices are
connected to it and your computer may not be able to start up.

5

If necessary, install device drivers (software that makes a device work with your computer).

Drivers needed for a SCSI device usually come on a floppy disk with the device. (If no drivers came
with the device, contact the device manufacturer.)

Note:  If you experience problems after connecting a SCSI device, see the troubleshooting information
in Part V for possible solutions.

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