Patent ID: 7257601
Filing Date: 2007-08-14
Classification: G11B,Y10S

Abstract:
1. A file management method wherein desired files are recorded on a recording medium and an index file recorded on the recording medium is updated in response to recording of any of the files, comprising: the index file being formed from a train of slots of extract information of the files and a folder or folders; each of the slots having set therein higher hierarchy reference information pointing to another slot of a higher hierarchy, lower hierarchy reference information pointing to a further slot of a lower hierarchy, same hierarchy reference information pointing to a still further slot of the same hierarchy and a valid/invalid flag representative of whether the slot is valid or invalid; a step of setting the valid/invalid flag of a predetermined one of the slots which is in a state set to valid with the valid/invalid flag to invalid to set the slot as a free slot while settings of the higher hierarchy, lower hierarchy and same hierarchy reference information of the slot are maintained.