LSI SYM22801 - Manual (Page 34)

2-20 Installing the SYM22801 Host Adapter
Figure 2.14 shows an example of how termination is determined for this
SCSI bus configuration.
Figure 2.14 Internal SCSI Device Termination
2.3.2 External SCSI Connections
If only external SCSI device connections to the host adapter have been
made, you must terminate the last external device on the SCSI bus. You
must disable the termination on all other devices. Termination on the host
adapter is automatically enabled in this case.
Figure 2.15 shows an example of how termination is determined for this
SCSI bus configuration.