Adaptec 29160LP User Reference - Page 9
Terminating the SCSI Bus, connected to the Adaptec SCSI Card 29160LP, the Boot Target
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Overview I If you are booting your computer from a SCSI hard disk drive connected to the Adaptec SCSI Card 29160LP, the Boot Target ID setting in the SCSISelect utility must correspond to the SCSI ID of the device from which you are booting. By default, the Boot Target ID is set to 0. We recommend that you do not change this setting. I In Windows® 95/98, you can use the Device Manager to determine which SCSI ID is assigned to each installed SCSI device. Terminating the SCSI Bus To ensure reliable communication on the SCSI bus, the ends of the SCSI bus must be properly terminated. This is accomplished when the device at the end of each cable, or the end of the cable itself, has a terminator installed (or enabled). Terminators must be removed, or termination must be disabled, on devices between the ends of each cable. Since the method for terminating a SCSI device can vary widely, refer to the device's documentation for instructions on how to enable or disable termination. Here are some general guidelines for termination: I Internal Ultra160 and Ultra2 SCSI devices come from the factory with termination disabled and cannot be changed. Proper termination for internal Ultra160 and Ultra2 SCSI devices is provided by a 68-pin Internal LVD SCSI cable, which has a built-in terminator at its end. I Termination on non-Ultra160 and Ultra2 internal SCSI devices usually is controlled by manually setting a jumper or a switch on the device, or by physically removing or installing one or more resistor modules on the device. I Termination on external SCSI devices usually is controlled by installing or removing a SCSI terminator. However, termination on some external devices is enabled or disabled by setting a switch on the back of the SCSI device. I By default, termination on the Adaptec SCSI Card 29160LP itself is set to Automatic (the preferred method). We recommend that you do not change this default setting. 3