I have this problem with my last three DVR's freezing up when replaying my recordings. Restarted and done all the updates. Is this a common hardware failure. IF so is their a better DVR. I have the new black 700 model. Recordings start to skip, freeze, get pixeliated. Could it be that I store 3/4 of hte hours on the hard drive with movies and cartoons and save them for months and months. I records and delete new should on the last 30 hours available. Is their away to defrag the hard drive. Or should i request another DVR for saved recordings.