Adaptec 2906 User Guide - Page 38

Terminating the SCSI Bus Adaptec presets the SCSI Card 2906 to SCSI ID 7. You should not change this setting. SCSI ID 7 has the highest priority on the SCSI bus; the remaining SCSI IDs descend in priority from 6 to 0. Use SCSI ID 0 for the first SCSI hard disk drive. Most internal SCSI hard disk drives come from the factory set to SCSI ID 0. See SCAM Protocol on page 29 for more information on assigning ID numbers. Here is some general information about SCSI IDs: I For internal SCSI devices, you generally set the SCSI ID by configuring a jumper on the SCSI device. I For external SCSI devices, you generally set the SCSI ID with a switch on the back of the device. I For specific instructions on setting the SCSI ID, refer to the SCSI device's documentation. I In Windows 95/98, you can use the Device Manager to view the SCSI ID assigned to the SCSI card and each SCSI device. SCAM Protocol The SCSI Card 2906 supports the SCSI Configured AutoMatically (SCAM) protocol. This protocol assigns SCSI IDs dynamically and resolves SCSI ID conflicts automatically when you start the computer. If your computer includes SCSI disk drives or other SCSI devices that support SCAM, you do not need to assign SCSI IDs manually to these devices. To determine if your SCSI device supports the SCAM protocol, check the SCSI device's documentation. To enable SCAM support, see Using SCSISelect on page 33. Terminating the SCSI Bus To ensure reliable communication on the SCSI bus, both ends must be terminated. Termination prevents the signal from bouncing off the end of the cable and interfering with itself. If the SCSI Card 2906 is connected at one end of the SCSI bus, you must terminate the device at the other end. 29