Terminating The Scsi Bus - Adaptec 19160 - SCSI Card Storage Controller U160 160 MBps Reference

If you have 8-bit (or Narrow) SCSI devices, they must use SCSI
IDs 0, 1, 2, 3, 4, 5, or 6. SCSI ID 0 is recommended for the first
SCSI hard disk drive.
If you are booting your computer from a SCSI hard disk drive
connected to the Adaptec SCSI Card 19160, the Boot Target ID
setting in the 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.
You can view or confirm SCSI ID assignments using the
SCSISelect disk utility. See Configuring the Adaptec SCSI Card
19160 with SCSISelect on page 17.
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In Windows 95/98, you can use the Device Manager to view
which SCSI ID is assigned to each installed SCSI device.

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
termination:
Internal Ultra160 and Ultra2 SCSI devices come from the fac-
tory with termination disabled and cannot be changed. Proper
termination for internal Ultra160 and Ultra2 SCSI devices is
provided by a 68-pin Internal LVD (Low Voltage Differential)
SCSI cable, which either has a built-in terminator at its end, or
has a terminator installed on the last connector on the cable.
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.
Overview
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