Due to the minefield of legislation covering the copying of propriety media such as DVD's and CD's one has to tread carefully when offering advice in this area. But given the damage that grand and not so grand kids can wreak on DVD's and the like "Backing Up" is no bad idea. I work on the misguided principle that providing such copies are for my own use and I have no intention of passing them on or off for gain or otherwise I feel my actions are justified or at least defensible. There are also occasions that I wish to send copies of my own work to various places and people as part of my art practice and studies so a "How To" reminder is in order. For those of a nervous disposition you ay want to read about the The Digital Millennium Copyright Act - DMCA! This information is available via the website Doom9.net the guy who runs this very succinct site about all things "Ripping" obviously knows his subject and conveniently brings all the info together in one place, so that's the place to go for more info.
As I "Back Up" DVD's and CD's so infrequently I can never remember what I did last time I did it so I decided on a Blog Post to remind me.
I have tried DVD Decrypter and DVD Shrink, they both seem to do the ripping just fine. If you have problems with encryption or copyright protection then DVD Decrypter is probably the best choice. You can find Guides on how to use this software on Doom9.