LSI SYM22801 - Manual (Page 37)

SCSI Bus Termination 2-23
Figure 2.17 shows an example of how termination is determined for this
SCSI bus configuration. If you connect the SYM22801 in the middle of
the bus, you will incur improper termination since the switches are not
assigned on that bus correctly.
Figure 2.17 Internal and Internal SCSI Device Termination
If you have an internal connection to another SYM22801 host adapter,
or any connection to a device that uses the same sensing method for
automatic termination as your SYM22801, you must properly set the
termination override switches U1 or U2 (see Figure 2.1).
2.3.4.1 Channel Switches
When connecting another SYM22801, you must turn on the switch for
the connector used on one or both of the boards. Please refer to
Figure 2.18, and the next two paragraphs, to determine the correct
switch setting.
Last D evices
on C hain -
Term ination
E nabled D oes N ot
E nd C hain -
Term ination
D isabled
H ost A dapter
A utom atically
Term inated