2.2.4.2 Internal SCSI Connections for Both Internal Connectors

If internal SCSI device connections to both internal connectors (J2 and J4) on your host adapter have been made, then terminate the internal devices on each end of the SCSI bus. You must disable the termination on all other devices. Termination on Channel A of your host adapter is automatically disabled in this case. Remember, you must not use the external connector J3 if you use both internal connectors.

Figure 2.13 shows an example of how termination is determined for this SCSI bus configuration.

Figure 2.13 Internal and Internal SCSI Device Termination

Does Not

 

 

 

 

 

End Chain–

 

 

 

 

Last Devices

Termination

 

 

 

 

on Chain–

Disabled

 

 

 

 

 

 

 

 

Termination

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Enabled

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: Host Adapter Termination

Automatically Disabled

2.2.4.3 External SCSI Connections

If only external SCSI device connections to the host adapter have been made, then 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 for Channel A.

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Installing the LSI21003