I have just finished building a Pentium II 300 on a LX motherboard, no problems there. Installed a SCSI 6X 4X CD writeable, no problems there. During all of this process the system contained a IDE Zip drive that was recognised by both CMOS & Windows 95 without problems. When you try to access a disk it says "Device not Ready" and doesn't even powerup the motor (except when the disk is inserted). The IDE bus contains:- Primary 4.3Gb & CD-Rom Secondary 6.4Gb & Zip.
I have removed the card and drivers for the SCSI but to no avail, the Zip is O.K. as it works in another system. I am assuming the IDE in the Zip is simulated SCSI as with the parallel drive.