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SCSI bus termination
The SCSI bus structure has a length limitation as well as a requirement for
termination at each end of the SCSI cable. The cable is designed to connect in a
daisy chain fashion with only one peripheral being connected to another. No
branching is permitted in the SCSI bus. The first and last physical SCSI device
on the SCSI bus must be terminated (see figure 2-1).
figure 2-1 Examples of SCSI bus termination
The INI-9100U/9100UW host adapter’s auto-termination is software controlled
by the SmartSCSI Setup Utility. This feature allows the operator to switch on
or off the auto-termination. If auto-termination is switched off, the operator
can manually adjust termination for the host adapter without the need to
remove the cover on the host system each time a change is made in the SCSI
bus configuration. There are three ways to manually control terminating the
INI-9100U on the SCSI bus (see table 2-1) and there are six ways to terminate
the INI-9100UW on the SCSI bus (see table 2-2).