I just got my Drobo v2 today. I put in a 2 TB drive just to start checking it out. I can’t put in the others yet because I am going to try a bit more to see if there’s any way I can recover data. Anyway, I get the subject error when I try to format to get started. It says I can use one drive…that it just won’t be protected. Any idea on the situation/solution? Thanks!
Try formatting with Disk Management in Administrative Tools. We had a discussion about this a week or two ago.[hr]
http://www.drobospace.com/forums/showthread.php?tid=2466
Thanks much. 
Did the trick. Wonder why support wasn’t aware of that.
If they weren’t I’m going to try to get on the clock