Adaptec 39106 manual Installing Multiple Scsi Cards, Connecting the LED Connector

Adaptec SCSI Card 39160 User’s Reference

Installing Multiple SCSI Cards

■You can install multiple SCSI cards in your computer; you are limited only by the available system resources (for example, IRQ settings, I/O port addresses, BIOS addresses, and so forth).

■Each SCSI card you install forms a separate SCSI bus with a different set of SCSI devices. SCSI IDs can be reused as long as the ID is assigned to a device on a different SCSI card (for example, each SCSI card can have a device with SCSI ID 2).

■If you have two or more SCSI cards and your computer boots from a SCSI disk drive, leave the host adapter BIOS enabled on the SCSI card to which the boot disk drive is connected. Use SCSISelect to disable the host adapter BIOS on the other SCSI cards.

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 diagram 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

LED Connector on host adapter

Pin 1

2-pin

LED

Cable

1

1

14