Specifications

110 PCA-6180 User’s Manual
SCSISelect utility must correspond to the SCSI ID of the device
from which you are booting. By default, the Boot SCSI ID is set to
0. We recommend that you do not change this setting.
• In Windows
®
95/98, you can use the Device Manager to determine
which SCSI ID is assigned to each installed SCSI device.
9.4 Terminating the SCSI Bus
To ensure reliable communication on the SCSI bus, the ends of the
SCSI bus must be properly terminated. This is accomplished when the
device at the end of each cable, or the end of the cable itself, has a
terminator installed (or enabled). Terminators must be removed, or
termination must be disabled, on devices between the ends of each
cable.
Since the method for terminating a SCSI device can vary widely, refer
to the device’s documentation for instructions on how to enable or
disable termination. Here are some general guidelines for termina-
tion:
• Internal Ultra160 and Ultra2 SCSI devices come from the factory
with termination disabled and cannot be changed. Proper termina-
tion for internal Ultra160 and Ultra2 SCSI devices is provided by a
68-pin Internal LVD (low voltage differential) SCSI cable, which
has a built-in terminator at its end.
• Termination on non-Ultra160 and Ultra2 internal SCSI devices
usually is controlled by manually setting a jumper or a switch on
the device, or by physically removing or installing one or more
resistor modules on the device.
• Termination on most external SCSI devices is controlled by
installing or removing a SCSI terminator. However, termination on
some external SCSI devices is enabled or disabled by setting a
switch on the back of the SCSI device.
• The last external Ultra160 or Ultra2 SCSI device must be termi-
nated with an LVD/SE (low voltage differential/single ended)
terminator plug to ensure that the device will operate at its maxi-