I apologize for my somewhat vague and inaccurate post about "mirroring" my HD. I actually meant to say synchronize my primary HD with the second one I installed in order to have a viable boot disk in case of failure of either one. In other words, disk redundancy, I guess. I am looking into a utility called FolderSynchronizer that will run from OS9 which is the system I use the most. They offer one for OSX which I may look into later when I get all my hardware and software together so OSX will be practical for me. Thanks to everybody for the help. Fred