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Introduction
■
On both SCSI buses (channels) the Adaptec SCSI Card is preset
to SCSI ID 7 and should not be changed. This gives the card the
highest priority on the SCSI bus.
■
Most internal SCSI hard disk drives come from the factory
preset to SCSI ID 0.
■
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, the Boot SCSI 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.
■
With the SCSISelect disk utility feature, you can confirm/view
which SCSI ID is assigned to each device. See
Configuring the Adaptec SCSI Card with SCSISelect
for more
information.
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 Ultra320/Ultra160 and Ultra2 SCSI LVD devices come
from the factory with termination disabled and cannot be
changed. Proper termination for these internal devices is
provided by the built-in terminator at the end of the 68-pin
internal LVD SCSI cable.
U320 UG.book Page 9 Tuesday, September 23, 2003 1:47 PM
