Western Digital 'My Book' VS. SuperDuper

[MMM]

Western Digital's My Book has a feature where it works automatically and continuously in the background. It’s designed to work without any user intervention, so once it has been set it up you can forget about it: Every time a change a saved, it’s automatically backed up to the My Book. Does SuperDuper have this feature? If not it would be a great addition to the next version. Another idea is maybe SuperDuper could perform the backup once you shut your Mac down (like FileVault does)

[dnanian]

No, that's not something we do. If it's the type of thing you want, have you considered simply mirror-RAIDing your drive?