mMake sure that the last (or only) device in the SCSI chain has a terminator. Make sure that no other external SCSI device has a terminator.

To ensure accurate transmission of information, a terminator must be at each end of a SCSI chain. Your computer’s main logic board, which is the first device in the chain, has a built-in terminator.

Some external SCSI devices from manufacturers other than Apple have built-in terminators. (Check the information that came with the device.) If the device at the end of the SCSI chain does not have a built-in terminator, you need to purchase and attach an external terminator.

SCSI terminator

If your SCSI device has a built-in terminator, use it as your last device in the chain or have your Apple-authorized service provider remove the terminator. You can attach or remove external terminators yourself.

Connecting a SCSI device

Be sure to read the previous section, “Before You Connect a Device,” before following the instructions in this one.

Use these general instructions in conjunction with those that came with your SCSI device:

1Turn off your Macintosh.

2Make sure the SCSI device is switched off.

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.

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Apple 6360 manual Connecting a Scsi device