RECORDING/REPRODUCING APPARATUS FOR PERFORMING RMW FOR LOW, RECORDING/REPRODUCING METHOD THEREFOR, AND INFORMATION STORAGE MEDIUM THEREFOR

• US 20100100694A1
• Filed: 12/18/2009
• Published: 04/22/2010
• Est. Priority Date: 12/15/2004
• Status: Active Grant

• Current Assignee: Jung-Wan Ko, Kyung-Geun Lee, Sung-Hee Hwang
• Original Assignee: Jung-Wan Ko, Kyung-Geun Lee, Sung-Hee Hwang
• Inventors: Hwang, Sung-hee, Ko, Jung-wan, Lee, Kyung-geun
• Granted Patent: US 7,958,389 B2
• Time in Patent Office: Days
• US Class Current: 711/155
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 20/1879 Direct read-after-write methods
• 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 2020/1222 ECC block, i.e. a block of error correction encoded symbols which includes all parity data needed for decoding
• CPC Class Codes: G11B 2020/1277 for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones
• CPC Class Codes: G11B 2020/1873 Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL
• CPC Class Codes: G11B 2020/1893 using linear replacement to relocate data from a defective block to a non-contiguous spare area, e.g. with a secondary defect list [SDL]
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded

Abstract

Replacement data for updating data recorded on an information storage medium is recorded in an area for logical overwrite (LOW) replacement; replacement data for replacing a defect generated on the medium is recorded in an area for defect replacement; and, if a defect is generated in an original block recorded in a predetermined area of the medium during a read-modify-write (RMW) process for a LOW for at least partial data of an original block, a replacement block replacing the original block is recorded in the area for LOW replacement and a defect list (DFL) entry including location information of the original block and location information of the replacement block is generated to indicate the replacement state.

Claims

1. A recording/reproducing method comprising:

recording replacement data for updating data recorded on an information storage medium in an area for replacement by logical overwrite (LOW) and recording replacement data for replacing a defect occurring on the medium in an area for replacement by defect;

if a defect occurs in an original block recorded in a predetermined area of the medium during a read-modify-write (RMW) process for a replacement by LOW for at least partial data of the original block, recording a replacement block replacing the original block in the area for replacement by LOW; and

generating a defect list (DFL) entry comprising location information of the original block and location information of the replacement block,

wherein the replacement block comprises a data portion containing user data and an additional information portion containing the location information of the original block.

2. The method of claim 1, wherein the data portion comprises a valid data portion, and an invalid data portion in which padding data is recorded.

3. The method of claim 2, wherein the additional information portion further comprises state information indicating that the valid data portion and the invalid data portion are included in the data portion.

4. The method of claim 3, wherein the state information indicates whether data is valid sector by sector.

5. The method of claim 1, wherein the recording of the replacement block comprises:

processing the additional information portion to be recorded to have better error correction capability than the user data portion.

6. The method of claim 1, wherein the location information of the original block and the location information of the replacement block are represented by addresses on a physical space of the medium.

7. A recording/reproducing apparatus comprising:

a pickup which emits or receives a light to transfer data with respect to an information storage medium or read data from the medium; and

a controller arranged to control the pickup to;

record replacement data for updating data recorded on the medium in an area for replacement by logical overwrite (LOW),

record replacement data for replacing a defect occurring on the medium in an area for replacement by defect, and

if a defect occurs in a first block recorded in a predetermined area of the medium during a read-modify-write (RMW) process for a replacement by LOW for at least partial data of the first block, record a second block replacing the first block in the area for replacement by LOW,

wherein the controller is further configured to generate a defect list (DFL) entry comprising location information of the first block and location information of the second block in order to indicate a replacement state of the data, and

wherein the second block comprises a data portion containing user data and an additional information portion containing the location information of the first block.

8. The apparatus of claim 7, wherein the first block is an original block or a previously recorded replacement block.

9. The apparatus of claim 7, wherein:

where the second block includes only data for updating the partial data of the first block, the system controller stores additional information indicating that sectors in the second block, other than sectors having the partial data, have invalid data.

10. The apparatus of claim 7, wherein:

the system controller stores the location information of the first block in the second block.

11. The apparatus of claim 7, wherein:

the system controller generates a DFL entry indicating that the first block is replaced with the second block.

12. The apparatus of claim 9, wherein:

where the updated data is subsequently reproduced, the system controller refers to the additional information to reproduce the updated data.

13. The apparatus of claim 9, wherein:

the additional information further comprises state information indicating whether data in the second block is valid, sector by sector.

14. The apparatus of claim 7, wherein:

during the read-modify-write (RMW) process for a replacement by LOW, reproduction of the first block is successful, the system controller modifies data recorded in the first block with update data and writes the modified data to the second block.

15. The apparatus of claim 7, wherein:

during the read-modify-write (RMW) process for a replacement by LOW, reproduction of the first block fails, the system controller writes only replacement data in one or more sectors of the second block and writes padding data in remaining sectors of the second block.