Quantum DAT 160 Betriebsanweisung

Appendix B  SCSI Configuration Guide

SCSI Termination

Quantum DAT 160 User’s Guide

57

• On external Quantum drives, the ID is displayed on the rear panel 

and can be set by pressing the little buttons above and below the 

number (using a ball point pen) (see 

• On removable Quantum drives, the ID is set on the back of the tape 

SCSI Termination 

2

Terminators are essential, as they provide the correct voltages on the SCSI 

bus and prevent unwanted signal reflections from interfering with data 

transfers. The rule is:

• There must be termination at both physical ends of the bus and only 

at the ends.

There are two main types of termination, active and passive. Active 

terminators reduce interference and allow faster data through 

Quantumut. On devices with high transfer speeds, such as Quantum 

DAT devices, active termination is required, using an LVD or multimode 

active terminator. (Multimode terminators allow both LVD and single-

ended devices to be connected to the same bus. They detect the type of 

bus and automatically supply the correct termination. The terminator 

supplied with Quantum DAT tape drives is LVD. Multimode terminators 

may be used instead.)

Normally the HBA forms one end of the SCSI bus and provides 

termination. You only need to ensure that the other end of the bus is 

terminated.

2

A suitably terminated LVD internal ribbon cable is supplied with the tape 

drive. The terminator is usually a small, rectangular block of plastic 

attached to the cable end and marked ‘SCSI Terminator’.