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Following are some guidelines for setting SCSI IDs and termination
on your devices.
Check the SCSI IDs
The Adaptec SCSI Card 29320A and each device you connect to it
must have a unique SCSI ID number ranging from 0 to 15 on each
channel. No two devices on the same SCSI channel can have the
same SCSI ID.
The Adaptec SCSI Card 29320A is preset to ID 7 for each channel
and should not be changed. If you boot from a SCSI hard disk,
make sure the hard disk SCSI ID is set to 0. (Most SCSI hard disks
are preset to SCSI ID 0 at the factory.) The SCSI IDs for internal
devices are usually set with jumpers; SCSI IDs for external devices
are usually set with a switch on the back of the device.
Terminate the Ends
To ensure reliable communication on the SCSI bus, the device at the
end of each cable, or the end of the cable itself, must have a
terminator installed (or enabled). Terminators must be removed, or
termination must be disabled, on devices between the ends of each
cable.
Note: When connecting Ultra320/160 or Ultra2 SCSI devices,
the SCSI bus must be terminated either on the end of the cable
(with a permanent terminator) or with a separate terminating
connector. Ultra SCSI and earlier single-ended devices can
terminate the bus directly from the device. If you use an Ultra
SCSI terminator on an LVD Ultra320/160 and Ultra2 SCSI
bus, the SCSI devices will not operate properly. For this
reason be sure that you have the necessary Ultra320/160 or
Ultra2 cable and terminator before installing the Ultra320/160
SCSI devices.
Connecting SCSI Devices
You can connect a total of 15 LVD and/or 15 SE SCSI devices to the
Adaptec SCSI Card 29320A. Before connecting devices, be sure to
review Setting Up SCSI Devices on page 3.
ASC-29320A IG.fm Page 4 Tuesday, July 29, 2003 3:30 PM