I'm actually having a real difficult time with the IDE hard drive currently in my Performa 630. I have tried all of my install disks (I own floppies of 7.5.3 and 7.6) and I can't get any of them to finish an installation without a failure. All three sets of disks installed on my LC III without issue. The only thing I haven't tried are my 7.0.1 disks, but I don't know that this Mac is compatible with that OS. I'm wondering if it's an IO issue with either the drive or the floppy connector. This is the message I keep getting at DIFFERENT stages of the installation every time I attempt an install. Any thoughts?