The Drobo 5D dashboard should have the current actual usable volume capacity added/listed under Drobo volumes. It currently only has max. capacity.
The max. capacity is helpful, but not as helpful as if it showed the actual usable volume capacity. It’s currently hard to gauge how much available capacity I have remaining on my volumes because the max. capacity is greater than actual/usable capacity.
I hope you can incorporate this into your next version of the Drobo Dashboard.