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Checking that the SCSI chain is properly terminated
To ensure accurate transmission of information, a chain of SCSI devices must
have a terminator at each end. Terminators are built into some SCSI devices.
m The Duo Dock and the Duo MiniDock both have built-in terminators.
m External SCSI devices from Apple do not have built-in terminators.
m External SCSI devices from other vendors may have built-in terminators;
see the documentation that came with the device.
What these facts mean to you: You do not need to add a terminator at the
beginning of the chain. You need to make sure that the last device in the chain
has an internal or external terminator, and that no other devices have
terminators.
If you are attaching one SCSI device
Make sure that there is one of the following:
m an internal terminator in that device
m an external terminator attached to that device
If you are attaching more than one SCSI device
Make sure that both of these conditions exist:
m an internal terminator in, or an external terminator attached to, the last
device
m no other terminators (internal or external) in the chain
If you have too many devices with internal terminators, your Apple-
authorized service provider can remove extra terminators.
SCSI chain configurations are shown in the illustration on the following page.
SCSI terminator
102
Chapter 9