Information storage medium, recording/reproducing apparatus, and recording/reproducing method

• US 20060123283A1
• Filed: 10/26/2005
• Published: 06/08/2006
• Est. Priority Date: 11/12/2004
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hwang, Sung-hee, Ko, Jung-wan
• Granted Patent: US 7,698,515 B2
• Time in Patent Office: Days
• US Class Current: 714/718
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2020/10907 using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas
• CPC Class Codes: G11B 2020/1826 wherein a defect list or error map is generated
• CPC Class Codes: G11B 2020/1873 Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL
• CPC Class Codes: G11B 2020/1896 using skip or slip replacement to relocate data from a defective block to the next usable block, e.g. with a primary defect list [PDL]
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers

Abstract

An information storage medium, a recording/reproducing apparatus and a recording/reproducing method are provided to increase data reproduction efficiency. The recording/reproducing apparatus includes: a write/read unit for recording data on an information storage medium and reading data from the medium; and a controller for controlling the write/read unit to record a replacement block by logical overwrite (LOW) for updating data recorded on the medium in a first area of the medium, record a replacement block for replacing a defect block generated on the medium in a second area of the medium, and record a second replacement block for replacement by defect of a first replacement block in the second area if the defect is detected while the first replacement block is being recorded in the first area to perform the logical overwrite of an original block recorded in a predetermined area of the medium, generate a defect list (DFL) entry including location information of the original block and location information of the second replacement block in order to indicate the replacement state, and move location information of the first replacement block in the second replacement block. As a result, an area for replacement by defect and an area for replacement by LOW are discriminated from each other, and data reproducing efficiency can be improved by effectively managing replacement information though the replacement by defect due to a defect generated during the replacement by LOW.

Claims

1. An information storage medium comprising:

a first area for updating data recorded on the medium using replacement by logical overwrite (LOW); and

a second area for replacing defects occurred on the medium,

wherein, if a defect is detected while a first replacement block is being recorded in the first area to replace an original block recorded in a predetermined area of the medium according to the replacement by LOW, a second replacement block for replacing the first replacement block is recorded in the second area using replacement by defect, and

wherein a defect list (DFL) entry indicating the replacement state includes location information of the original block and location information of the second replacement block, and the second replacement block includes location information of the first replacement block.

2. The information storage medium as claimed in claim 1, wherein the second replacement block is a recording/reproducing unit block, including a user data portion for user data and an additional information portion for the location information of the first replacement block.

3. The information storage medium as claimed in claim 2, wherein the additional information portion is recorded to have better error correction capability than that of the user data portion.

4. The information storage medium as claimed in claim 1, wherein the location information of the original block and the location information of the second replacement block are represented by addresses of a physical space of the medium.

5. The information storage medium as claimed in claim 1, wherein the first area is a user data area, and the second area is a spare area.

6. An information storage medium comprising:

a first area for updating data recorded on the medium using replacement by logical overwrite (LOW); and

a second area for replacing defects occurred on the medium,

wherein, if a defect is detected, while a first replacement block is being recorded in the first area to replace an original block recorded in a predetermined area of the medium according to the replacement by LOW, a second replacement block for replacing the first replacement block is recorded in the second area using replacement by defect, and

wherein a first defect list (DFL) entry indicating the state of the replacement by LOW and a second DFL entry indicating the replacement state of the replacement by the defect occurred during the replacement by LOW are provided.

7. The information storage medium as claimed in claim 6, wherein the first DFL entry includes location information of the original block and location information of the first replacement block, and the second DFL entry includes the location information of the first replacement block and location information of the second replacement block.

8. The information storage medium as claimed in claim 7, wherein the first DFL entry further includes link state information for indicating that the first replacement block related to the first DFL entry has been replaced with the second replacement block.

9. The information storage medium as claimed in claim 6, wherein the first area is a user data area, and the second area is a spare area.

10. A recording/reproducing apparatus comprising:

a write/read unit arranged to record data on an information storage medium and read data from the information storage medium; and

a controller for controlling the write/read unit to record a replacement block by logical overwrite (LOW) for updating data recorded on the medium in a first area of the medium, record a replacement block for replacing a defect block occurred on the medium in a second area of the medium, and record a second replacement block for replacement by defect of a first replacement block in the second area if the defect occurs while the first replacement block is being recorded in the first area to perform the logical overwrite of an original block recorded in a predetermined area of the medium, for generating a defect list (DFL) entry including location information of the original block and location information of the second replacement block so as to indicate the replacement state, and arranging location information of the first replacement block in the second replacement block.

11. The recording/reproducing apparatus as claimed in claim 10, wherein the second replacement block is a recording/reproducing unit block including a user data portion for user data and an additional information portion for the location information of the first replacement block.

12. The recording/reproducing apparatus as claimed in claim 11, wherein the controller further controls the write/read unit to record the additional information portion so that the additional information portion has better error correction capability than that of the user data portion.

13. The recording/reproducing apparatus as claimed in claim 10, wherein the location information of the original block and the location information of the second replacement block are represented by addresses of a physical space of the medium.

14. The recording/reproducing apparatus as claimed in claim 10, wherein the first area is a user data area, and the second area is a spare area.

15. A recording/reproducing apparatus comprising:

a write/read unit arranged to record data on an information storage medium and record data from the information storage medium; and

a controller for controlling the write/read unit to record a replacement block by logical overwrite (LOW) for updating data recorded on the medium in a first area of the medium, record a replacement block for replacing a defect block occurred on the medium in a second area of the medium, and record a second replacement block for replacement by defect of a first replacement block in the second area if the defect occurs while the first replacement block is being recorded in the first area to perform the logical overwrite of an original block recorded in a predetermined area of the medium, and for generating a first defect list (DFL) entry indicating the state of the replacement by LOW and a second DFL entry indicating the state of the replacement by the defect occurred during the replacement by LOW.

16. The recording/reproducing apparatus as claimed in claim 15, wherein the first DFL entry includes location information of the original block and location information of the first replacement block, and the second DFL entry includes the location information of the first replacement block and location information of the second replacement block.

17. The recording/reproducing apparatus as claimed in claim 16, wherein the first DFL entry further includes link state information for indicating that the first replacement block related to the first DFL entry has been replaced with the second replacement block.

18. The recording/reproducing apparatus as claimed in claim 15, wherein the first area is a user data area, and the second area is a spare area.

19. A recording/reproducing apparatus comprising:

a write/read unit arranged to record data on an information storage medium and read data from the information storage medium; and

a controller configured to control the write/read unit to record replacement data by logical overwrite (LOW) for updating data recorded on the medium in a user data area, to generate a defect list (DFL) entry including location information of an original block and location information of a replacement block so as to indicate the replacement state, and to set the location information of the replacement block in the DFL entry to location information of an original block in another DFL entry if a space according to a data write command is a logically un-recorded space, but is a physically recorded space.

20. The recording/reproducing apparatus as claimed in claim 19, wherein the logically un-recorded and physically recorded space is identified recording/reproducing unit block by recording/reproducing unit block.

21. A recording/reproducing method comprising:

recording a replacement block by logical overwrite (LOW) for updating a block recorded on an information storage medium in a first area of the medium and recording a replacement block for replacing a defect block occurred on the medium in a second area of the medium;

recording a second replacement block for replacement by defect of a first replacement block in the second area by arranging location information of the first replacement block in the second replacement block if the defect occurs while the first replacement block is being recorded in the first area to perform the logical overwrite of an original block recorded in a predetermined area of the medium; and

generating a defect list (DFL) entry including location information of the original block and location information of the second replacement block so as to indicate the replacement state.

22. The method as claimed in claim 21, wherein the second replacement block is a recording/reproducing unit block including a user data portion for user data and an additional information portion for the location information of the first replacement block.

23. The method as claimed in claim 22, wherein the additional information portion has better error correction capability than that of the user data portion.

24. The method as claimed in claim 21, wherein the location information of the original block and the location information of the second replacement block are represented by addresses of a physical space of the medium.

25. The method as claimed in claim 21, wherein the first area is a user data area and the second area is a spare area.

26. A recording/reproducing method comprising:

recording a replacement block by logical overwrite (LOW) for updating a block recorded on an information storage medium in a first area of the medium, recording a replacement block for replacing a defect block occurred on the medium in a second area of the medium, and recording a second replacement block for replacement by defect of a first replacement block in the second area if the defect occurs while the first replacement block is being recorded in the first area to perform the logical overwrite of an original block recorded in a predetermined area of the medium; and

generating a first defect list (DFL) entry indicating the state of the replacement by LOW and a second DFL entry indicating the replacement state of the replacement by defect occurred during the replacement by LOW.

27. The method as claimed in claim 26, wherein the first DFL entry includes location information of the original block and location information of the first replacement block, and the second DFL entry includes the location information of the first replacement block and location information of the second replacement block.

28. The method as claimed in claim 27, wherein the first DFL entry further includes link state information for indicating that the first replacement block related to the first DFL entry has been replaced with the second replacement block.

29. The method as claimed in claim 28, wherein the first area is a user data area, and the second area is a spare area.

30. A recording/reproducing method comprising:

recording replacement data by logical overwrite (LOW) for updating a block recorded on an information storage medium in a user data area;

generating a defect list (DFL) entry including location information of an original block and location information of a replacement block so as to indicate the replacement state; and

setting the location information of the replacement block in the DFL entry to location information of an original block in another DFL entry if a space according to a command is a logically un-recorded space, but is a physically recorded space.

31. The method as claimed in claim 30, wherein the logically un-recorded and physically recorded space is identified by the recording block.

32. A data reproducing apparatus comprising:

a read unit to read data from an information storage medium; and

a controller controlling the read unit to read a replacement block recorded at a replacement location based on replacement location information included in a defect list (DFL) entry related to data to be reproduced, and if error correction of the read replacement block fails, controlling the read unit to obtain a location of a previous replacement block from an additional information portion included in the replacement block and read a replacement block recorded at the location of the previous replacement block, and reproducing the read replacement block.

33. A data reproducing apparatus comprising:

a read unit to read data from an information storage medium; and

a controller controlling the read unit to read a replacement block recorded at a replacement location based on replacement location information included in a second defect list (DFL) entry linked to a first DFL entry related to data to be reproduced if link state information is set in the first DFL entry, and if reproduction of the read replacement block fails, controlling the read unit to read a replacement block recorded at a replacement location based on replacement location information included in the first DFL entry, and reproducing the read replacement block.

34. A data reproducing method comprising:

reading a replacement block recorded at a replacement location based on replacement location information included in a defect list (DFL) entry related to data to be reproduced;

if error correction of the read replacement block fails, obtaining a location of a previous replacement block from an additional information portion included in the replacement block; and

reading a replacement block recorded at the location of the previous replacement block and reproducing the read replacement block.

35. A data reproducing method comprising:

reading a replacement block recorded at a replacement location based on replacement location information included in a second defect list (DFL) entry linked to a first DFL entry related to data to be reproduced if link state information is set in the first DFL entry; and

if reproduction of the read replacement block fails, reading a replacement block recorded at a replacement location based on replacement location information included in the first DFL entry, and reproducing the read replacement block.