Patent ID: 8347397

Claim:
A method of operation for a Personal Video Recorder having a stationary memory and an external memory of rewritable type, the method comprising: generating, after a new content item has been recorded on the stationary memory, an up-to-date file system information about the content items on the stationary memory, storing the up-to-date file system information on the stationary memory, storing, in case there is enough unused memory capacity on the external memory, a copy of the up-to-date file system information on the external memory, and using, in case the up-to-date file system information on the stationary memory is destroyed, the copy of the up-to-date file system information from the external memory to restore the stationary memory; wherein the storing a copy of the up-to-date file system information comprises writing the copy of the up-to-date file system information to the external memory at a position at the beginning of the unused memory capacity thereof, and not marking the copy of the up-to-date file system information into a second file system of the external memory, such that the copy of the up-to-date file system information gets overwritten whenever a new content item is being recorded on the external memory.