Termination - Plextor UltraPlex PX-32CSe User Manual

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 termination jumper or turn off
SCSI termination DIP switch by following 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
peripheral in a daisy chain. If you are using an Ultra SCSI host adapter we recommend
enabling 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 daisy chained 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.
power can and should be provided by at least one device
Termination
attached to your SCSI host adapter. Your Plextor CD-ROM drive auto-
matically 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
must disable or turn OFF the UltraPleX's termination using the following
instructions:
---- CHAPTER 7 ----
after your UltraPleX, you
ULTRAPLEX OPERATION MANUAL
last
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