I just tried installing an Iomega IDE internal ZIP drive. Installation appears normal. CMOS found it, Win 95 sees it and I can even change it's drive letter as it says in the installation manual.
When I use the Iomega software to do any type of copying it always says the disk is write protected. Looking at the disk through the software or "my computer" drive properties it says the disk is NOT write-protected. It appears I can format the disk but not write to it.
When I use the "guest" executable file that comes with the software and it assigns a drive letter in DOS, I can not access that drive letter from DOS.
I have made it a slave with the CD-ROM as Master, or tried it as a stand-alone. Results are the same. I've also tried several new disks with same results.