Can I attach Wide peripherals to a Narrow SCSI bus?
• Answer: Sure, it’s easy. If you have only Narrow peripherals to attach to a Wide SCSI host adapter with no Wide devices, you can cable them together with 25 pair (50-wire) cabling. You will need a cable having a 68-pin connector on the host end and a suitable 50-pin connector on the peripheral end. This cable must have only 25 pairs of wire in it. As usual, make sure there are terminators at the two extreme ends of the cabling. If you have a Wide peripheral to connect to a Narrow bus that already has Narrow peripherals on it, you can use a 50-pin female to 68-pin male adapter and plug the adapter into the Wide peripheral. If it is at the end of the bus, make sure it is terminated. Although we have not experienced any problem with it, if you are conservative, it is best practice to either terminate the upper byte on the Wide device(s) or provide other circuitry to assure that the 9 bits plus parity of the upper byte are biased to a false state in order to prevent failure to complete t
