I bought a relatively cheap PVR a while ago to record programs from TV to watch at a later time. While the item is fine in principle, I do encounter issues with skipping during some recordings. Thinking this type of device is basically a harddrive, I am wondering if bad clusters are to blame. If you watched a movie and this happens midway in the plot, it gets annoying. Is there anything that can be done to fix the problem? If this is not possible, how should I treat these "spots" on the drive that have problems? Should I delete the programs or rather keep the recording, so that this bad spot will not be used for future recordings?