User`s guide

DigiDrive Guide40
SCSI Terminators and Adaptors
The Pro Tools SCSI chain must be properly terminated or your system will not function properly.
Only the last device on the chain should be terminated. Depending on the configuration of your
drives, you will need one of several different types of SCSI terminators and adapters to cover the vary-
ing style of connectors found. Descriptions and illustrations are provided in Table 8.
Digidesign recommends the use of SCSI terminators supplied by Avid Technology. These color-coded
terminators are specifically designed to ensure data integrity on the SCSI bus for systems that run real-
time applications. Avid terminators are available through your Digidesign dealer.
You need to connect an ultra, wide-to-narrow SCSI adapter to change from 68-pin cabling to 50-pin
cabling. The adapter terminates the unused lines to help prevent any SCSI bus problems.
Table 8. SCSI Terminators and Adapters
Type Style Description
50-pin terminator Fast, narrow terminator for SCSI buses that have only
narrow drives (purple).
50-pin terminator Ultra, narrow terminator for SCSI buses that have a
mixture of wide and narrow drives (blue).
68-pin multi-mode
terminator
Ultra, wide terminator for wide drive SCSI buses which
run in LVD or Single-ended mode (blue).
68-pin to 50-pin
adapter
Ultra, wide-to-narrow terminating adapter for connect-
ing wide and narrow drives (blue).