Optical disc, method and apparatus for managing a defective area on an optical disc

• US 7,672,204 B2
• Filed: 09/26/2003
• Issued: 03/02/2010
• Est. Priority Date: 01/27/2003
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sung Dae, Park, Yong Cheol
• Primary Examiner(s): Wellington; Andrea L
• Assistant Examiner(s): DANIELSEN, NATHAN ANDREW
• Application Number:
  US10/670,332
• Publication Number:
  US 20040158768A1
• Time in Patent Office: 2,349 Days
• Field of Search: 369/47.14, 369 5312- 5313, 369 5315- 5317, 369 5335- 5337, 369/59.25
• US Class Current: 369/47.14
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2007/0013 for carriers having multiple discrete layers
• CPC Class Codes: G11B 2020/1873 Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 7/00745 Sectoring or header formats within a track formats in general G11B20/12

Abstract

A method and apparatus for managing a defective area on a optical recording medium, e.g., of writable once type, permits more efficient writing and management of defect list information or temporary defect list information for managing the defective area in a minimum recording size. The method includes writing data in a defective area existing on a high density optical disc, e.g., such as a BD-WO, in a spare area in place of the defective area, producing defect list information for access to the data replacement written in the spare area and writing in a particular area for defect management. The defect entries actually corresponding to the replacement written data, and writing location information of the next available spare area are written and managed as defect list information for management, or the writing location information of a location where replacement writing is possible is written and managed as defect definition structure information.

Claims

1. A method for managing a recording medium having at least one temporary defect management area (TDMA), at least one defect management area (DMA) and at least one spare area, said method comprising:

writing data associated with a defective area to the at least one spare area as replacement data if the defective area is detected within a data area of the recording medium; and

writing defect management information in the at least one temporary defect management area for access to the data written in the at least one spare area, wherein said defect management information includes location information indicating a next available address of the at least one spare area,

wherein the defect management information includes temporary defect list information and temporary disc structure information in the at least one temporary defect management area,

the location information is written in the temporary disc structure information, and

the temporary defect list information includes one or more defect entries and a defect list terminator following the one or more defect entries, and a defect entry is used to manage the defective area and the defect list terminator indicates a termination of the temporary defect list information.

2. The method according to claim 1, wherein the temporary defect list information has a recording size smaller than four clusters.

3. The method according to claim 1, wherein a recording size of the temporary defect list information to be written is varied to a recording size greater than one cluster when a number of defect entries exceeds one cluster of recording size.

4. The method according to claim 3, wherein the recording size of the temporary defect list information to be written is varied to a recording size greater than one cluster but smaller than four clusters.

5. The method according to claim 1, wherein the recording medium is a single layer Blu-ray disc of writable once type (BD-WO) having an inner spare area and an outer spare area assigned thereto, and the location information includes two pointers, the two pointers indicating next available addresses of the inner spare area and outer spare area, respectively.

6. The method according to claim 1, wherein the recording medium is a dual layer Blu-ray disc of writable once type (BD-WO) having an inner spare area and an outer spare area assigned to each of a first layer and a second layer respectively, and the location information includes four pointers, the four pointers indicating next available addresses of the inner spare area and outer spare area within the first layer and the second layer, respectively.

7. The method according to claim 1, wherein the location information points to a first sector of a next available cluster of the at least one spare area.

8. The method as claimed in claim 1, wherein the temporary disc structure information includes physical sector number information corresponding to a location of the temporary defect list information.

9. A recording medium comprising:

a spare area within a data area, said spare area configured to store replacement data;

a temporary defect management area configured to store defect management information to manage a defective area when the recording medium is under a non-finalized state; and

a defect management area configured to store the defect management information to manage the defective area when the recording medium is under a finalized state,

wherein data associated with the defective area is written in said at least one spare area as the replacement data; and

wherein said defect management information includes location information indicating a next available address of the spare area,

the defect management information further includes temporary defect list information and temporary disc structure information in the at least one temporary defect management area,

the location information is written in the temporary disc structure information, and

the temporary defect list information includes one or more defect entries and a defect list terminator following the one or more defect entries, and a defect entry is used to manage the defective area and the defect list terminator indicates a termination of the temporary defect list information.

10. The recording medium according to claim 9, wherein the recording medium is a single layer Blu-ray disc of writable once type (BD-WO) having an inner spare area and an outer spare area assigned thereto, and the location information includes two pointers, the two pointers indicating next available addresses of the inner spare area and outer spare area, respectively.

11. The recording medium according to claim 9, wherein the recording medium is a dual layer Blu-ray disc of writable once type (BD-WO) having an inner spare area and an outer spare area assigned to each of a first layer and a second layer respectively, and the location information includes four pointers, the four pointers indicating next available addresses of the inner spare area and outer spare area within the first layer and the second layer, respectively.

12. The recording medium according to claim 9, wherein the recording medium is a Blu-ray disc of writable once type (BD-WO).

13. The recording medium according to claim 9, wherein the location information points to a first sector of a next available cluster of the spare area.

14. The recording medium according to claim 9, wherein the temporary disc structure information includes physical sector number information corresponding to a location of the temporary defect list information.

15. An apparatus for managing a recording medium having at least one temporary defect management area (TDMA), at least one defect management area (DMA), and at least one spare area, said apparatus comprising:

a pickup configured to read data from the recording medium and write data on the recording medium; and

a controller, operatively coupled to the pickup, configured to control the pickup to write the data associated with a defective area to the at least one spare area as replacement data if the defective area is detected within a data area of the recording medium; and

control the pickup to write defect management information in the at least one temporary defect management area for access to the data written in the at least one spare area,

wherein said defect management information includes location information indicating a next available address of the at least one spare area,

the defect management information includes temporary defect list information and temporary disc structure information in the at least one temporary defect management area,

the location information is written in the temporary disc structure information, and

the temporary defect list information includes one or more defect entries and a defect list terminator following the one or more defect entries, and a defect entry is used to manage the defective area and the defect list terminator indicates a termination of the temporary defect list information.