In all honestly, I cant say that that the 2 GB configuration is what I actually plan to do, I was just wondering about the maximums. What I expect will happen is that I'll use 4 500GB disks to get 2 500GB RAID 1 volumes strictly to keep the costs of disks down. That way I can do one volume now and another later. I simply want to understand the limits so that if I decide to try it with 4 1TB disks I know what to expect.
And yes, I've been accused of being "freaking nuts" on more than one occasion...