Is there a way in catalog or arcpy to determine the amount of hard drive space a SDE feature class takes up on disk?
In catalog the 'size' column is blank and Esri help states:
The size, modification date, and read/write columns apply to several file-based objects, such as maps and shapefiles. No values will appear in these columns for data stored in a database or file-based objects that don't support retrieving that information from the file system.
As for arcpy, I have not see a property of any Describe object that can call size or read/write for that matter. The answer question How to get size of file geodatabase feature class on disk? provides the solution for a file GDB, but how can it be done for SDE feature classes?