WD Caviar black 2TB internal sata, less than a year old, less than half full, recently defragged, tried multiple sata ports and restarts. If I copy something from it to another drive it starts fast and then slows down to like 7 MB / sec. I used to use it for video recording and now it's not able to do it anymore, just gives constant frame skip. Loading stuff from is is slow as hell. I would think it's on its way out but it's not even a year old. Faulty?