I had a similar problem and posted here a while back, but didn't get a response. In my circumstance, someone I found on this list guided me thru setting up a second hard drive on my G4 400Mhz. We put the OSx3.9 on the new hard drive that formatted to 128GB. I did a fresh load of OS 9 on the older 10GB. I was able to toggle between the two operating systems at start up with no problem. Then, one day, at start up when I selected the drive with OS9, the computer hangs-up and never boots from that disc. If I restart and select the drive with OSX, no problem. I'm sure many people need to boot both operating system. Maybe someone knows of a website that trouble shoots these types of issues. Any advise would be appreciated. Thanks! Virginia Harlow vharlow at ford.com | Business Phone: 313.39.02936 | Cell: 586.945.8606 | -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/g4/attachments/20071003/48a43741/attachment.html