I think Time Machine will do this, but just want to be certain. I'm sure if it does work as I hope someone is already doing it, so.... The scenario: 1 disk as boot volume with Leopard installed - call this disk 1 1 disk with all user data (having moved the location OS X uses for the Home folder to this) - call this disk 2 1 disk for Time Machine backups - call this disk 3 All drives are internal SATA. Now, I'm not interested in Time Machine keeping backups of the drive Leopard is actually installed on to (disk 1) since it would only be the OS and apps. What I would want is for Time Machine to monitor and keep backups only of disk 2 to disk 3. Can it be configured like this?