Method for managing defective area on write-once optical recording medium, and optical recording medium using the same

• US 7,532,551 B2
• Filed: 09/26/2003
• Issued: 05/12/2009
• Est. Priority Date: 09/26/2002
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Sung Dae, Park, Yong Cheol
• Primary Examiner(s): Young; Wayne R
• Assistant Examiner(s): SIMPSON, LIXI CHOW
• Application Number:
  US10/670,381
• Publication Number:
  US 20040071056A1
• Time in Patent Office: 2,055 Days
• Field of Search: 369 5316- 5317
• US Class Current: 369/53.17
• CPC Class Codes: G11B 20/10009 Improvement or modification of read or write signals
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 20/22 for reducing distortions
• CPC Class Codes: G11B 2020/1288 Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082

Abstract

A method for managing a defective area of a write-once optical recording medium, and an optical recording medium using the same, are provided. The method includes steps of firstly writing replacement data in a predetermined area, the replacement data corresponding to a defective area detected during a data reproduction operation; secondly writing locator information in the predetermined area, the locator information indicating respective positions of the defective area and the corresponding replacement data; and thirdly writing a supplementary access pointer in a lead-in area, the access pointer for accessing the locator information written in the predetermined area. The predetermined area, which may be located inside or outside the data area, stores supplementary defect list information enabling data read operations when defective areas are newly detected by a host after recording data on a write-once type disc such as a BD-WO disc.

Claims

1. A method for managing a defective area of a recording medium having a data area, a lead-in area and a lead-out area, the method comprising:

detecting a defective unit during reproducing or recording operation;

recording the data of the defective unit in a replacement unit; and

recording defect management information in a defect management area,

wherein the defect management area includes a first part and a second part, the first part is used to record therein defect management information generated during a recording operation and the second part is used to record therein defect management information generated during a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a defective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein the method further comprises recording a first access pointer and a second access pointer in the defect management area, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indicating a position of the defect management information recorded in the second part.

2. The method as claimed in claim 1, wherein the first and the second parts of the defect management area are assigned in the lead-in area respectively.

3. The method as claimed in claim 2, wherein the replacement unit is included in a spare area, and the spare area is assigned in the data area.

4. The method as claimed in claim 1, wherein the first and second parts are assigned in the data area.

5. A method for managing a defective area of a recording medium having a data area, a lead-in area and a lead-out area, the method comprising:

detecting a defective unit during reproducing or recording operation;

recording the data of the defective unit in a replacement unit;

recording a defect entry in a defect management area, the defect entry including locator information indicating positions of the defective unit and the replacement unit; and

recording an access pointer in the defect management area, the access pointer indicating position of defect management information including the defect entry,

wherein the defect management area includes a first part and a second part, the first part is used to record therein defect management information generated during a recording operation and the second part is used to record therein defect management information generated during a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a detective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein the method further comprises recording a first access pointer and a second access pointer in the defect management area, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indicating a position of the defect management information recorded in the second part.

6. The method as claimed in claim 5, wherein the first and the second parts are assigned in the lead-in area respectively.

7. The method as claimed in claim 5, wherein the replacement unit is included in a spare area, and the spare area is assigned in the data area.

8. The method as claimed in claim 5, wherein the first and second parts are assigned in the data area.

9. A recording medium comprising:

a data area including a spare area, the spare area including a replacement area;

a lead-in area; and

a defect management area, the defect management area including a first part and a second part,

wherein the first part is used to record therein defect management information generated during a recording operation, and the second part is used to record therein defect management information generated during a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a defective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein the defect management area is configured to store therein a first access pointer and a second access pointer, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indicating a position of the defect management information recorded in the second part.

10. The recording medium as claimed in claim 9, wherein the second part of the defect management area is assigned in the lead-in area, and the first part and the second part of the defect management area are assigned separately.

11. The recording medium as claimed in claim 9, wherein the second part of the defect management area is assigned in the data area, and the second part of the defect management area includes at least one sub defect management area.

12. The recording medium as claimed in claim 9, wherein the first and second parts are assigned in the data area.

13. A method for managing a defective unit of a recording medium having a data area, a lead-in area and a lead-out area, the method comprising:

detecting a defective unit during reproducing or recording operation;

recording the data of the defective unit in a spare area; and

recording defect management information in a defect management area, the defect management area including a first part and a second part, the time for using the first part being different from the time for using the second part,

wherein the first part is used to record therein defect management information generated during a recording operation, and the second part is used to record therein defect management information generated daring a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a defective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein the method further comprises recording a first access pointer and a second access pointer in the defect management area, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indicating a position of the defect management information recorded in the second part.

14. The method as claimed in claim 13, wherein the first part and the second part of the defect management area are assigned in the lead-in area separately.

15. The method as claimed in claim 13, wherein the first part of the defect management area is assigned in the lead-in area and the second part of the defect management area is assigned in the spare area.

16. The method as claimed in claim 13, wherein the first and second parts are assigned in the data area.

17. A recording medium comprising:

a data area including a spare area, the spare area including a replacement area;

a lead-in area; and

a defect management area, the defect management area including a first part and a second part, the time for using the first part being different from the time for using the second part,

wherein the first part is used to record therein defect management information generated during a recording operation, and the second part is used to record therein defect management information generated during a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a defective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein the defect management area is configured to store therein a first access pointer and a second access pointer, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indication a position of the defect management information recorded in the second part.

18. The method as claimed in claim 17, wherein the first part and the second part of the defect management area are assigned in the lead-in area separately.

19. The method as claimed in claim 17, wherein the first part of the defect management area is assigned in the lead-in area and the second part of the defect management area is assigned in the spare area.

20. The recording medium as claimed in claim 17, wherein the first and second parts are assigned in the data area.

21. An apparatus for managing a defective area of a recording medium having a data area, a lead-in area and a lead-out area, the apparatus comprising:

a pick up unit being configured to read/record data from/on the recording medium; and

a controller, operatively coupled to the pick up unit, being configured to detect a defective unit during reproducing or recording operation, and the controller further configured to control the pick up unit to record the data of the defective unit in a replacement unit and record defect management information in a defect management area,

wherein the defect management area includes a first part and a second part, the first part is used to record therein defect management information generated during a recording operation and the second part is used to record therein defect management information generated during a reproducing operation,

wherein the defect management information generated during the recording operation includes position information of a defective unit and a corresponding replacement unit, and the defect management information generated during the reproducing operation includes position information of a defective unit and a corresponding replacement unit, and

wherein said controller is further configured to control the pick up unit to record a first access pointer and a second access pointer in the defect management area, the first access pointer indicating a position of the defect management information recorded in the first part and the second access pointer indicating a position of the defect management information recorded in the second part.

22. The apparatus as claimed in claim 21, wherein the first and the second parts of the defect management area are assigned in the lead-in area respectively.

23. The apparatus as claimed in claim 21, wherein the replacement unit is included in a spare area, and the spare area is assigned in the data area.

24. The apparatus as claimed in claim 21, wherein the first and second parts are assigned in the data area.