We've got a couple of VMAX3 100K arrays, each with several storage groups that are all associated with the Optimized service level.

However, on the Unisphere Storage Groups Dashboard -> Storage Resource Pools -> Demand Report it is showing over a terabyte of used capacity with Service Level of .  I'm seeing this on both arrays.

I'm trying to figure out what exactly is using this space.  Is it some default overhead that is not configurable by the user?  Since all storage groups are associated with Optimized I would expect the Demand Report to only show capacity under that Service Level.

Thanks,

Eddy