I just had to replace a WD7500AAKS in my 1st TiVo HD. After all of the reading, I gave the new Western Digital Green 1TB EARX drive a try. I have NO technical problems. The drive boots/soft re-boots, etc. However, Automatic Acoustic Management is LOCKED. You CANNOT adjust it down. As a result, I have a drive that is quiet enough to be in my home server, but way too noisy for my TiVo! You CANNOT control the AAM through any means I was able to find in Google. In fact, it seems as though some HDD manufactures are going to stop including the feature. Buyers beware - the new WD green drives CAN NOT adjust acoustics = loud(er) noises.