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— CHAPTER 7 —
Termination
YOUR TASK:
Find the location of the SCSI termination jumper or switch.
YOUR OBJECTIVE:
Determine if you must disable the SCSI termination.
YOUR METHOD:
Your drive was shipped with termination enabled. If necessary, remove the termination jumper or turn off the SCSI termination DIP switch by following the instructions below.
You must enable SCSI termination if the UltraPleX is the only SCSI peripheral used with your computer. In addition, you must enable termination if you are using multiple SCSI peripherals with your computer and the UltraPleX is positioned as the last peripheral in a daisy chain. If you are using an Ultra SCSI host adapter, we recommend using active termination.
NOTE: The UltraPleX uses active termination.
If you have internal SCSI peripherals only, or external SCSI peripherals only
(but not both), then you should be using an internal ribbon cable or external cable (or cables), respectively (but not both). In this case, all devices between the host adapter and the last peripheral on the opposite end of the ribbon cable, or the last peripheral at the end of your daisy chain, should have their termination removed, disabled, or turned off.
If you have both internal and external SCSI peripherals (both the internal and external connectors of your host adapter are used), then the termination of your SCSI host adapter should be removed or disabled. The last peripheral on your internal cable and the last peripheral on your external daisy chain should retain their termination. All other SCSI peripherals connected to the host adapter should have their termination removed, disabled, or turned off.
NOTE: Some host adapters and peripherals have the ability to disable and enable termination power. This should not be confused with termination itself. Termination power can and should be provided by at least one device attached to your SCSI host adapter. Your Plextor drive automatically supplies termination power. Any additional devices supplying termination power will not cause any problems.
REMEMBER: Only the last SCSI peripheral in a daisy chain should have termination enabled. If you have any SCSI devices chained after
ULTRAPLEX 40X OPERATION MANUAL
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