I have been running Backup Desktop version 5.0 since it came out on OS X.1 and have had no trouble at all. I have since upgraded to OS X.2 (Jaguar). I've created a new backup set and when I insert erased media Retrospect tries to erase the media to prepare for backup and after a couple minutes it comes back with the following error "Couldn't erase disk, error 205 (lost access to stroage medium)". No matter how many different DVD-RAM cartridges I try, this happens. Existing storage sets seem to run ok at this time.