Could you run a full span 4K random write for around 500GB both with compressible and incompressible data at QD 32? For incompressible data, I would expect a very high WA, around 10-20 as this would be worst possible scenario. For this kind of test, if you would like to do it, you would need to note the start values for E9 and EA after at least 60GB as it takes a little to fill all cells.