22
Barracuda 18LP Installation Guide, Rev. B
For information about how to terminate your drive, refer to the
appropriate drive-specific section.
Figure 2.
SCSI bus termination
Terminator power
You usually will not need to change this option and can normally
leave the drive configured as it was shipped from the factory. For
information about how to change the terminator power option on
your drive, refer to the appropriate drive-specific section.
I/O circuits and data path widths
Note. Make sure your system I/O controller circuit board has
the proper I/O circuits to communicate with this drive. You
may have to replace your old controller with a newer one
having the proper I/O circuits. The following paragraphs
and tables will help you to know whether you want to
operate the drive I/O circuits in single-ended (SE) mode
or low voltage differential (LVD) mode. If your old I/O con-
troller operated the I/O circuits in differential mode,
chances are it was high voltage differential mode (HVD).
Internal
SCSI device
Internal
SCSI device
Controller
External
SCSI device
External
SCSI device
External
SCSI
cable
Internal SCSI cable
Terminate
Internal
SCSI device
Internal
SCSI device
Controller
Internal SCSI cable
Terminate
