This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
I have had a Zip Drive hooked to a CMS SCSI card (1990 ROM) for 2-3 years in my IIgs without a hitch. Basically you just go into the setup for the CMS card. It will partition the drive into 32 meg sections which you can access two at a time-- It makes three on a Zip disk. Then once GS/OS is booted it tells you that the disk is unreadable and asks if you want it formatted and you hit ok for each virtual drive and there you have it. (I never tried formatting it with HFS since I didn't need a partition l arger than 32megs.) The one thing to remember is DON'T EJECT THE DISK while booted. Go to shutdown first and, when it tells you to shut it off, then change disks. ---------------------------- By: David Empson I would strongly discourage using the CMS card. It is designed to work with CMS hard drives. I don't know how well it can handle removable SCSI devices; and, it might not be able to handle more than 64 MB. So even if you can get the card to work with the ZIP drive, you may not be able to access all of the disk. Another problem is that the CMS card doesn't support the standard partitioning scheme used by other Apple II SCSI cards. It uses a set of jumpers on the card to configure the partition sizes, and doesn't support the partition map mechanism at all. In other words, it uses "hard partitioning". See if you can get hold of an Apple or RamFast SCSI card, which follow all the standards as far as partitioning goes. By: Rubywand