Adaptec 29320A-R User Guide - Page 34

Using the Adaptec SCSI Card and SCSI Devices Connecting the LED Connector (Optional feature) Most computers have an LED disk activity light on the front panel of the system case. If you choose to disconnect the cable from the LED connector on the motherboard and connect it to the LED connector on the SCSI card as shown in the figure below, the LED on the front panel of the computer will light whenever there is activity on the SCSI bus. Note: If you connect the LED cable to the SCSI card, the LED disk activity light will no longer indicate disk activity on the non-SCSI disk drives. LED Cable from Motherboard 2-pin LED Cable LED Connector on SCSI Card 1 1 Pin 1 Overriding SCSI Termination Settings You use SCSISelect to control the termination of the two SCSI channels on an Adaptec SCSI Card. The default termination setting for both channels is Automatic. This setting allows the SCSI card to adjust SCSI termination automatically, depending on which connectors have SCSI devices attached to them. Regardless of the SCSISelect termination setting, the SCSI card termination is always disabled when the power is turned off. If you want SCSI card termination to be enabled when the power is turned off, you must terminate the SCSI channels manually. 2-7