Defective region processing apparatus, defective region processing method, and information storage device
AssigneeFujitsu Limited
InventorsYuji Karakawa, Shigenori Yanagi
Life of this patent
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Abstract
A defective sector is processed so that a mark can be normally read in a sector adjacent to a defective sector. A recording state of a sector determined as a defective sector (step S102: Yes) is changed to another recording state in which a level of cross talk is low (step S103).
Claims18
A defective region processing apparatus comprising:
- a mark writing section writing a mark onto an information storage medium, said information storage medium having a recording area divided into a plurality of regions, information being recorded by writing a mark in said region and reproduced by reading said mark;
- a judging section making judgment upon whether a region in which a mark is written by said mark writing section is a normal region or a defective region;
- and
- a recording state changing section changing a recording state of a mark in a region determined as a defective region by said judging section so that cross talk caused due to said region can be reduced.
A defective region processing method comprising:
- mark writing step of writing a mark in a region on an information storage medium, said information storage medium having a recording area divided into a plurality of regions, information being recorded by writing a mark in said region and reproduced by reading said mark;
- judging step of making judgment upon whether a region in which a mark is written by said mark writing step is a normal region or a defective region;
- and
- recording state changing step of changing a recording state of a mark in a region determined as a defective region by said judging step so that cross talk caused due to said region can be reduced.
An information storage device for recording information onto an information storage medium which has a recording area divided into a plurality of regions, on which information is recorded by writing a mark in said region and from which information is reproduced by reading said mark, said information storage device comprising:
- a mark writing section writing said mark on said information storage medium;
- a judging section making judgment upon whether a region in which a mark is written by said mark writing section is a normal region or a defective region;
- and
- a recording state changing section changing a recording state of a mark in a region determined as a defective region by said judging section so that cross talk caused due to said region can be reduced.
Dependencies are inferred from the claim text.