Also, if you put a non-Ultra2 Wide device on your SCSI chain, the chain will drop back to the speed and cable limits of Ultra Wide. You cannot reliably hook up a Wide device to a Narrow card. However, you can hook up a Narrow device to a Wide card. Because the Wide connectors have more pins, you will need at least one new cable to connect your Narrow devices to the new, wider port. But moving your Zip drive to a new Wide card will not make the drive faster, either.
Devices have their own built-in speed limitations.
Also, keep yourself grounded by winding a grounding strap around your wrist and attaching the end to metal. None of the cards we looked at came with a strap, but you can buy one at most electronics stores. Once you're sure you're not a lightning rod, pop the card into any available PCI slot. Use this software every time you attach new hard drives to the SCSI port. Adaptec supplied software on floppies only, which isn't particularly useful for computers without floppy drives.