Eugene Lee said: > For disk fragmentation, >Apple thinks that the gains are too small compared to the risks of >using any 3rd-party defragmentation app. > > http://docs.info.apple.com/article.html?artnum=25668 I don't do audio/video recording myself, but on another list I mentioned that defragmenting was probably no longer necessary for this purpose, and several folks with a lot of experience in the area of audio and video work strongly disagreed. In fact, they recommended going with a SCSI drive instead of an IDE drive for serious audio/video work. As for Apple's official take on defragmentation, I cite that document on my Web page at: OS X Routine Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html Note #2 ...along with other information about optimization that you may or may not find useful. It may be that file fragmentation is no longer a problem under Panther. But disk fragmentation still is. You probably won't realize any overall performance gains by defragmenting, but you may realize some significant reliability gains as your drive approaches 80% full. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) How To Deal With Common OS X 10.3 Panther Problems http://www.macattorney.com/panther.html