I found an old thread about this but didn't find a resolution. The thread contained advice from Opus indicating that each harddrive should be connected separately to it's own IDE controller, positioned on the connector closest to the motherboard, and that the CD drives should be slaved from them. I have a Plexwriter 8-4-32A and also remember having difficulty getting it to operate as a slave. This didn't matter since my current system has only one harddrive, I just slaved the CD-ROM off the Plextor on the second IDE. Now with my rebuild just days away I'm wondering if anyone using a Plextor drive has it running properly as a slave to one of the hard drives.