The data is stored redundantly (3x) in California, and there are several datacenter locations around the world, but I'm not sure any of them are a full backup of the entire collection.

There is an unofficial project by volunteers to make a geographically-distributed backup of the Archive. http://www.archiveteam.org/index.php?title=INTERNETARCHIVE.B... The basic tech is functioning now, you can run it http://www.archiveteam.org/index.php?title=INTERNETARCHIVE.B... but we're looking for developers to make it more user-friendly. If you'd like to help out, stop by #internetarchive.bak on efnet. http://chat.efnet.org