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Check the SCSI IDs
The Adaptec SCSI Card 29320 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 29320 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.
N
OTE
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.
C
ONNECTING
You can connect a total of up to 15 LVD and/or 15 SE SCSI
devices to the Adaptec SCSI Card 29320. Before connecting
devices, be sure to review Setting Up SCSI Devices on page 3.
Connecting Internal Ultra320/160 and Ultra2 Devices
A special 68-pin internal LVD cable is needed to connect internal
Ultra320/160 or Ultra2 SCSI devices. If your cables are not
marked, you can identify most LVD cables as having twisted
pairs of the flat ribbon cable between the device connectors. Some
When connecting Ultra320/160 or Ultra2 SCSI devices,
SCSI D
EVICES
4
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