Can I attach Narrow devices to a Wide SCSI bus?
• Answer: Yes. But, it is a little more involved than placing a Wide peripheral on a Narrow bus and there are several considerations that must be observed. For purposes of discussion, let’s say that you have a Wide host adapter and a Narrow drive. Both are single-ended or both are differential. • If you have only a Narrow peripheral (or multiple Narrow peripherals) with no Wide devices connected to the Wide host adapter, simply cable everything together with 50-wire cables. Do not use 68-wire cables. • If you already have a Wide SCSI bus with Wide peripherals and you want to add a Narrow peripheral, it gets a little more complicated as you must make sure that all 68 wires of the SCSI cabling is carried all the way through to the end of the bus. • The cleanest, easiest and most reliable, but not the cheapest way to place Narrow peripherals on a Wide bus is to use a Wide SCSI expander such as a SCSI RegeneratoR™. A Wide RegeneratoR™ has 68-pin connectors and terminators on both connector
