Hey, My dad currently has a 2008 Mac Pro and is thinking of replacing it sometime soon. The iMac would be a pretty nice choice, but the only problem is the lack of internal storage. Would it be feasible to have three external Thunderbolt (TB) drives, and then a forth to back up the internal drive as well as two of those three external TB drives. I'm thinking the third TB drive (that isn't backed up by Time Machine) would be a 3-6TB Thunderbolt drive in Raid 1... that should be just as safe as using Time Machine (in terms of not losing data), right? Has anyone done a similar thing or does anyone have any suggestions? I'm aware Apple will be releasing a 2013 Mac Pro but I'm not sure he wants to wait for that.