nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq4cc90lplh078x6xvsrl9mv6tlugh22yz9pswztuvrj3at2vlf3ms03vgn8 (nprofile…vgn8) nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqj524zr9lvpehndw5atrmw092q4gdxl09m5dd3vfft8nau48x8lhsf04wnp (nprofile…4wnp) It does do that. It just doesn't count it as increasing the entropy estimate because there isn't a scientific paper detailing how much entropy a hard disk produces.
Writing 256 bits to /dev/random should be enough to shut the estimator up.