LSI U160 - Manual (Page 41)

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Detailed Installation Procedure 2-21
2.2.6.3 Internal and External Bus Connections
If you have both internal and external SCSI device connections to your
host adapter, you must terminate the last internal and last external
devices on the SCSI bus. You must also disable the termination on all
other devices. Termination on the host adapter is automatically disabled
in this case.
Figure 2.14 shows an example of how termination is determined for this
SCSI bus configuration.
Figure 2.14 Internal and External SCSI Device Termination
Last device on Bus –
Does not end Bus –
Host Adapter Termination
Do not end Bus –
Last Device on Bus –
Terminators Enabled
Terminators Disabled
Automatically Disabled
Terminators Disabled
Terminators Enabled