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 PlexWriter 4/12 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 PlexWriter 4/12 is positioned
as the
last
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.
Termination power can and should be provided by at least one device
attached to your SCSI host adapter. Your Plextor CD-R drive automat-
ically 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
your PlexWriter
4/12, you must disable or turn OFF the PlexWriter’s termination using
the following instructions:
---- CHAPTER 7 ----
5.75" x 8.25" PLEX WRITER MANUAL
Plextor manual, Carla Williams
1/2/98
PX-R412CS OPERATION MANUAL
19
