I currently have a hardware solution that is no longer in production (G-Safe). I would like to add another Raid 1 drive pair to my Mac Pro, so that I can periodically break Raid, swap out the 2nd drive and take that current 2nd drive off site and replace it with another brought back from offsite. Is this a viable solution with OS X Raid? Can you successfully remove "Drive 2" and have it retain its data, and add a new "Drive 2" that will get its data copied from "Drive 1"? And if my "Drive 1" went bad can I get a new one of the same size and restore from "Drive 2"? And of course, how reliable is OS X Raid on Mountain Lion? Thanks!