To my knowledge which has been reinforced by Sony pro 4K representative, there is no spinning drive in the X1. It is static circuitry and the only hum or buzz from the unit itself is electrical and not mechanical.
Again, I'm told because both the TV and the X1 are on the same network, there will be modest electrical consumption and connectivity when watching any TV source.
---Sony has provided me with complementary products for evaluation. Participation in this program does not affect my posted comments, concerns or criticisms. ---
So are you indicating by saying that, that Sony managed to equip the X1 with a 1 TB SSD (which average over $500 by themselves) into a $699 4K media player?