I have an original Drobo V1 filled with 4x 1.5TB drives (4.08TB usable space).
As a result of the 2TB limit per volume when connected via USB, I have 3 volumes, and hence 3 different drive letters.
In my case, I:, J:, K:
After a restart earlier today, the drobo volumes normally associated with I: and J: switched to P: and V: for some unknown reason. I had not added any new volumes which would have taken those drive letters, not that it should matter anyway. I: & J: drive letters are not used by Windows for any volumes now.
I tried to switch those volumes back to I: & J: via the Drobo Dashboard interface, but I: & J: are not listed as possible options.
This is extremely inconvenient as I have many programs tied to these drive letters and switching all of those programs will be very time consuming, if all of them are even possible at this stage.
@Spencer: If you open Windows Explorer (Windows-E) then go to the Folder Options (Alt-T, Folder Options, go to View tab) there’s an option called “Hide empty drives in the Computer folder” that is checked by default. Try un-checking it.
Even though it’s enabled, the function doesn’t seem to work on any of my machines, but it might be working on yours.