Optical disc of write once type, method, and apparatus for managing defect information on the optical disc

• US 7,813,243 B2
• Filed: 02/06/2008
• Issued: 10/12/2010
• Est. Priority Date: 01/27/2003
• Status: Expired due to Term

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sung Dae, Park, Yong Cheol
• Primary Examiner(s): CHOW, VAN NGUYEN
• Application Number:
  US12/068,420
• Publication Number:
  US 20080259753A1
• Time in Patent Office: 979 Days
• Field of Search: 369/53.17, 369/47.14
• US Class Current: 369/53.17
• 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

An optical disc of write once type, a method and an apparatus of managing defect information on the optical disc of write once type, e.g., a BD-WO, are provided with a temporary defect management area (TDMA). The method includes preparing the temporary defect management area (TDMA) in which a temporary defect list (TDFL) is recorded as defect management information for managing a defective area on the optical disc, recording the most recent temporary defect list cumulatively with the previous temporary defect list in the temporary defect management area, and recording position information for indicating a position of the most recent temporary defect list in the temporary defect management area along with the temporary defect list to more effectively manage the temporary defect list.

Claims

1. A method for managing a recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, the method comprising steps of:

recording, onto a temporary defect management area allocated to at least one of the non-data area and the spare area, a defect list for managing a defective area existing on the data area;

recording, onto the temporary defect management area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing the defect list in the temporary defect management area exist in the recording medium; and

recording, onto the final defect management area, a latest defect list recorded in the temporary defect management area when no further recording is made on the recording medium.

2. The method of claim 1, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

3. An apparatus for managing a recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, comprising:

a pickup configured to write data onto the recording medium; and

a microprocessor operatively coupled to the pickup and configured to control the pickup to

record, onto a temporary defect management area allocated to at least one of the non-data area and the spare area, a defect list for managing a defective area existing on the data area,

record, onto the temporary defect management area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing the defect list in the temporary defect management area exist in the recording medium, and

record, onto the final defect management area, a latest defect list recorded in the temporary defect management area when no further recording is made on the recording medium.

4. The apparatus of claim 3,

wherein a defect list pointer unused for the one or more recording-units is set to 0, and

wherein the microprocessor is configured to control the pickup to record the plurality of defect list pointers onto the temporary defect management area.

5. The apparatus of claim 3, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

6. A computer-readable recording medium including a non-data area and a data area having a user data area and a spare area, the recording medium comprising:

a temporary defect management area allocated to at least one of the non-data area and the spare area,

wherein the temporary defect management area stores therein a defect list and the temporary defect management area stores therein position information having a plurality of defect list pointers,

wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing the defect list in the temporary defect management area exist in the recording medium, and

wherein a final defect management area stores a latest defect list within the temporary defect management area when no further recording is made on the recording medium, the final defect management area being allocated to the non-data area.

7. The recording medium of claim 6, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

8. An apparatus for managing a recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, comprising:

a pickup configured to write data onto the recording medium;

a servo configured to control the pickup to maintain a distance from the recording medium and to track a track of the recording medium;

a data processor configured to process data to be written onto the recording medium and supply the processed data to the pickup;

a memory configured to store data associated with the recording medium; and

a microprocessor operatively coupled to the pickup, the servo, the data processor and the memory, wherein the microprocessor is configured to control the components so that the pickup

records, onto a temporary defect management area allocated to at least one of the non-data area and the spare area, a defect list for managing a defective area existing on the data area,

records, onto the temporary defect management area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing the defect list in the temporary defect management area exist in the recording medium, and

records, onto the final defect management area, a latest defect list recorded in the temporary defect management area when no further recording is made on the recording medium.

9. The apparatus of claim 8, wherein the microprocessor is configured to control the components so that the pickup records a total of 8 defect list pointers as the position information for the defect list onto the temporary defect management area.

10. The apparatus of claim 9,

wherein a defect list pointer unused for the one or more recording-units is set to 0, and

wherein the microprocessor is configured to control the components so that the pickup records the plurality of defect list pointers onto the temporary defect management area.

11. The apparatus of claim 8, wherein the microprocessor is configured to control the components so that the pickup records the position information onto a last recording-unit among the one or more recording-units.

12. The apparatus of claim of 8, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

13. A method for reproducing management information of a recording medium from the recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, the method comprising steps of:

reproducing, from a temporary defect management area allocated to at least one of the non-data area and the spare area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing a defect list in the defect management area exist in the recording medium;

reproducing the defect list recorded in the one or more recording-units in the temporary defect management area based on the position information until the recording medium is finalized; and

reproducing a defect list from the final defect management area if no further recording is made on the recording medium.

14. The method of claim 13, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

15. An apparatus for reproducing management information of a recording medium from the recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, the apparatus comprising:

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

a microprocessor operatively coupled to the pickup,

wherein the microprocessor is configured to control the pickup to reproduce, from a temporary defect management area allocated to at least one of the non-data area and the spare area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more clusters containing a defect list in the defect management area exist in the recording medium, and

wherein the microprocessor is further configured to control the pickup to reproduce the defect list recorded in the one or more recording-units in the temporary defect management area based on the position information, and

wherein the microprocessor is further configured to control the pickup to reproduce a defect list from the final defect management area if no further recording is made on the recording medium.

16. The apparatus of claim 15, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.

17. An apparatus for reproducing management information of a recording medium from the recording medium, the recording medium including a non-data area having a final defect management area and a data area having a user data area and a spare area, the apparatus comprising:

a pickup configured to read data from the recording medium;

a servo configured to control the pickup to maintain a distance from the recording medium and to track a track of the recording medium;

a data processor configured to process data read from the recording medium;

a memory configured to store data associated with the recording medium; and

a microprocessor operatively coupled to the components above—

the pickup, the servo, the data processor and the memory, and configured to control the components so that the pickup reproduces, from a temporary defect management area allocated to at least one of the non-data area and the spare area, position information having a plurality of defect list pointers, wherein one or more defect list pointers among the plurality of defect list pointers respectively indicate where one or more recording-units containing a defect list in the temporary defect management area exist in the recording medium,

wherein the microprocessor is configured to control the pickup to reproduce the defect list recorded in the one or more clusters of the temporary defect management area based on the position information, and

wherein the microprocessor is configured to control the pickup to reproduce a defect list from the final defect management area if no further recording is made on the recording medium.

18. The apparatus of claim 17, wherein each recording-unit on the recording medium is a cluster consisting of 32 sectors.