US 5,442,614 AGranted

Method of recording data and information regarding defects

AssigneeCanon Kabushiki Kaisha

InventorMasahiro Tamegai

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Abstract

A method of recording information on an information recording medium including a first area having a plurality of sectors for recording data and a second area having a plurality of blocks for recording a directory used for managing the data is disclosed. Data is recorded on a first sector group consisting of at least one sector in the first area of the medium. When there is a defect in at least a part of the first sector group, the data to be recorded is recorded on a second sector group consisting of at least one sector in the first area. A directory corresponding to the data is recorded in the first block of the second area of the medium. When there is a defect in the first sector group, information regarding the defect is recorded into the first block of the second area. When only a part of the information regarding the defect can be recorded in the first block, the remaining information regarding the defect is recorded into the second block of the second area.

Claims7

Dependent claims

A method of recording information onto an information recording medium comprising a data area having a plurality of sectors to record data and a directory area having a plurality of blocks to record directories, which are used to manage the data, said method comprising the steps of:

recording the data into a first sector group comprising at least one sector in the data area of the medium;
when there is a defect in at least a portion of the first sector group, recording the data to be recorded to the portion having the defect into a second sector group comprising at least one sector in the data area;
recording the directory corresponding to the data into the first block in the directory area of the medium;
when there is a defect in the first sector group, recording information regarding such a defect into the first block in the directory area;
and
when only a portion of the information regarding the defect can be recorded into the first block, recording the remaining information regarding the defect into the second block in the directory area,
wherein an address of the head defective sector and the number of sectors indicating that defects continuously exist in those sectors when counted from the head defective sector are recorded as the information regarding the defects.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/351,066Filed 30 Nov 1994 · continuation
Priority: JP 3-26142513 Sep 1991
Granted: 15 Aug 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G11B 7/007
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the…:…
G06F 16/9017
Indexing; Data structures therefor; Storage structures: using directory or table look-up
G11B 7/0033
Recording, reproducing or erasing systems characterised by the shape or form of the carrier: with cards or other card-like flat carriers, e.g.…
G11B 20/1215
Formatting, e.g. arrangement of data block or words on the record carriers: on cards