I have two Premieres. One with a 2TB drive and the other stock. If I swap drives and then run Clear and Delete Everything on both will they operate fine? Update: I'm still wondering however I resolved my issue. I swapped fans. One had a Cofan which is a lot louder and I noticed its blades have roughly twice the surface area. It also caused the case to vibrate (a bit) causing a high pitch hum. The other is a Delta and it's much quieter. Neither is really loud I'm just sensitive regarding noise and I sit in a room with one of TiVos endless hours with nothing else on.