Terminators are a vital part of your SCSI chain: without proper termination your SCSI bus will not function. Make sure your external HPDB68 SCSI cable is properly terminated with the TEU320EXTM68. Compatible with Ultra 320/ Ultra 160 SCSI drives, this multi-mode terminator works with both LVD & SE signaling. Like all Star Tech.com's SCSI terminators, the TEU320EXTM68 is constructed with the highest quality components.