LSI 21003 - Manual (Page 35)

Detailed Installation Procedure 2-19
Figure 2.14 shows an example of how termination is determined for this
SCSI bus configuration on the host adapter external Channel A.
Figure 2.14 External SCSI Device Termination
Last Device
on Chain–
Termination
Enabled Does Not
End Chain–
Termination
Disabled
Host Adapter
Automatically
Terminated