Worth backing up the OS partition as an image to your external hard disk (you can boot from it). I've found it a lifesaver when things go bad... like when I installed a OS security update and my MacBook Pro failed to boot up afterwards.
That is a very good idea. With my old G4, I'll use that as the back up partition. I'm thinking of making it wi-fi, so can store it in a corner in my living room, all by itself.




Time to google it...



