By Bertel Schmitt When attempting to wring every last bit of speed out of your SCSI drives, watch your SCSI cables and watch your termination - with extreme prejudice. If the setup fails outright, then you are actually in luck, because it makes you do something about it. What's more insidious is a marginal setup. Your frames drop. Avoid external cables as much as possible.
Flat cables are much better than round cables.
In a flat cable, every other wire is a ground wire which provides perfect shielding. If you absolutely have to connect a stack of external devices, consider flat cable for connection of the stack. Run a high quality round cable to the first device in the stack and then daisy-chain the remaining stack of devices with flat cable. If you have a modicum of manual dexterity, you can make them yourself with a vise, or you can order them from a place that makes them. More on that below.