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Information storage medium which stores defect management information, method of replacing defect management information, and apparatus which replaces defect management information

A technology for information storage and defect management, applied in the fields of information storage media, replacement defect management information and devices

Inactive Publication Date: 2006-07-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if fingerprints, dust, etc. are later removed (by cleaning the disk) so that the error rate is improved and the DMA is rebuilt satisfactorily, the DMA is no longer usable

Method used

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  • Information storage medium which stores defect management information, method of replacing defect management information, and apparatus which replaces defect management information
  • Information storage medium which stores defect management information, method of replacing defect management information, and apparatus which replaces defect management information
  • Information storage medium which stores defect management information, method of replacing defect management information, and apparatus which replaces defect management information

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Embodiment Construction

[0028] Embodiments of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is according to an embodiment of the present invention information storage medium (for example utilizes the rewritable optical disc of phase change: utilize the DVD-RAM of blue laser, DVD-RW or next generation high density HD_DVD-RAM, HD_DVD-RW etc.) An example diagram of a data structure.

[0029] The DMA is set in a fixed physical address area in the medium, and the DMAs in which the same content is stored are set in a plurality of parts in the medium to increase resistance to interference with respect to the DMA. For example, in the HD_DVD-RAM disc according to one embodiment of the present invention, DMAs are provided in four parts in total: two parts (DMA1, 2) of the disc innermost periphery (lead-in area); area) in two parts (DMA 3, 4). The same content is recorded in four DMAs (DMA 1 to 4).

[0030] The user area is an area for storing user data. A...

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Abstract

A plurality of defect management areas (DMA set groups 1 to N) are used in a ring form in such a manner that defect management information of the DMA replaces and is recorded in the next spare area while the DMA is supposed to be still sufficiently rewritable (e.g., currently used DMA sets #1-1 to #4-1 are replaced with the next DMA sets #1-2 to #4-2), and a process returns to a first defect management area again at a time when transition of the defect management information ends up to a last spare area (DMA sets #1-N to #4-N).

Description

[0001] Cross References to Related Patent Applications [0002] This application is based upon and claims priority from prior Japanese Patent Application No. 2004-378142 filed on December 27, 2004, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an information storage medium (rewritable optical disc, etc.) storing defect management information, a method for replacing defect management information, and an apparatus for replacing defect management information (recording / reproducing apparatus using a rewritable optical disc or an optical disc drive). Background technique [0004] In an information storage medium capable of rewritably recording information, such as an optical disc in which a phase change is used, a mechanism for compensating for "a defective portion generated at the time of recording" on the disc is provided. An area for managing generated defective portions is called a defect managemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/12G11B20/18G11B7/00
CPCG11B20/1883G11B2220/20G11B7/007G11B7/0045G11B20/12G11B20/10
Inventor 森尾美菜子立泽之康兼重敏彦宇野徹三原直人森野浩明
Owner KK TOSHIBA