"That’s weird! Drobo’s whole second-volume thing is a little funky – I think they assume that most people will create a thin 8 or 16 TB volume and leave it at that! I have also had some weirdness with my partitioned Drobo volume on my Mac. Again, the expectation is that you’ll just create one huge thin volume and call it a day! I guess you can always ask the engineers when you see them next month! Stephen" - Stephen Foskett