OK, really frustrated with this enclosure. The fan is noisy as heck when it's powered on, but as soon as I take the fan out from the chassis it's dead quiet. Nothing I have tried gets rid of the buzzing from whatever is vibrating in the fan when it's inserted into the back of the drive. So, my question is, how much heat will two drives back to back generate without this fan? Too dangerous (i.e., drive failure)? This is for my Mac mini home theater and the two drives hold my movies and TV shows.