Recorder and recording medium
View Patent ↗Each record of a file recording management table has three fields: Type, Contents, and Next Record Number. The Type field indicates whether the record is a “file name record” that has file name information in the Contents field or a “consecutive recording area record” that has position information on a consecutive recording area (position information on a positionally consecutive recording area) of file data in the Contents field. The records are linked and are recorded in one physical recording area as one file recording management table.
1. A recorder that records file management data, created for managing data as a file provided on a recording medium, comprising:
a record generation unit that creates a first record and a second record, said first record describing file name information comprising information on a file name of the file, said second record describing recording area information comprising information on a recording area position in which the file is recorded;
a memory unit that stores the first and second records generated by said record generation unit; and
a recording unit that sequentially reads the first and second records from said memory unit and records a file recording management table, in which the first and second records are consecutively arranged, in one predetermined physical recording area on said recording medium as file management data,
wherein
said record generation unit generates each of the first and second records having three fields, comprising a type field, a contents field and a next record number field, in common as the same recording format,
said first record being generated as a record comprising the type field describing identification information indicating that the record has the file name information; the contents field describing the file name information; and the next record number field describing record specification information, which specifies a next record following the first record, as file management information on the same file,
said second record being generated as a record comprising the type field describing identification information indicating that the record has the recording area information; the contents field describing the recording area information; and the next record number field describing either record specification information, which specifies a next record following the second record, as file management information on the same file or information, which indicates that the second record is an end record, as information on the same file, and
when a recording area of the same file is composed of a plurality of positionally non-consecutive divided recording areas, a plurality of the second records are generated, one for each divided recording area for describing the recording area information corresponding thereto, and
wherein said recording unit consecutively arranges the first and second records based on the information described in the next record number fields of the first and second records.
2. A recording medium on which file management data, created for managing data as a file, and the file are recorded,
wherein a file recording management table, in which a first record and a second record are consecutively arranged, is formed in one predetermined physical recording area as file management data, said first record describing file name information comprising information on a file name of the file, said second record describing recording area information comprising information on a recording area position in which the file is recorded,
wherein
each of the first and second records has three fields, comprising a type field, a contents field and a next record number field, in common as the same recording format,
said first record comprising the type field describing identification information indicating that the record has the file name information; the contents field describing the file name information; and the next record number field describing record specification information, which specifies a next record following the first record, as file management information on the same file, and
said second record comprising the type field describing identification information indicating that the record has the recording area information; the contents field describing the recording area information; and the next record number field describing either record specification information, which specifies a next record following the second record, as file management information on the same file or information, which indicates that the second record is an end record, as information on the same file,
wherein, when a recording area of the same file is composed of a plurality of positionally non-consecutive divided recording areas, a plurality of the second records are generated, one for each divided recording area for describing the recording area information corresponding thereto, in the file recording management table, and
wherein the first and second records are consecutively arranged in the file recording management table according to the arrangement sequence indicated by the information described in the next record number fields of the first and second records.