How to use multiple disks with Time Machine in Mountain Lion
Having a full system backup solution for any PC is a highly recommended setup, but a preferred setup is to have redundant backups either in the same location or better yet, in multiple locations. While Apple has offered its Time Machine service as a fairly robust backup solution for OS X users, the service has been limited to a single backup drive and did not support any redundancy options. In Mountain Lion this has changed and you can now use multiple drives with Time Machine for the same system.
In prior versions of OS X, users had to either use … Read more