2torial #0431: Learn2 Connect External SCSI Devices (Macintosh OS) - Continued Troubleshoot The SCSI standard (or rather, standards) make peripheral connection a pretty straightforward process; most of the time, the steps in this 2torial should have you up and running. Nevertheless, problems can arise. Here are a few situations that you might run into: Non-standard SCSI connectors on devices. Some devices, such as Zip drives, don't have 50-pin Centronics-style connectors on them. All you have to do to integrate them into your multiple-device chain is buy a cable that has the standard 50-pin connector on one end, and whatever connector the device uses on the other. These devices generally ship with a cable that will allow you to connect them to your computer by themselves, and if they are the only device in your chain...well, no worries. Trying to mix Fast/Wide devices with standard devices. If you really need to do this, make sure the Fast/Wide device is first in the chain, and get a 68-pin to 50-pin Centronics-style cable to attach the standard devices to the Fast/Wide one. Be aware, however that performance of that Fast/Wide device will greatly suffer. Multiple SCSI chains. Some of the new high-end computers support two or more SCSI paths. This is your best solution to mixing Fast/Wide and standard devices on one computer, having dedicated chains for each. Bad cables. Cables will go "bad" if they're flexed too far or have a manufacturing defect, or were just of poor quality to begin with. If you're having trouble, try switching cables around. The fix could be as simple as buying a new one. -end- Learn More! or All steps at once (printable version)