Recording/reproducing apparatus for performing RMW for low, recording/reproducing method therefor, and information storage medium therefor
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.
1. An information storage medium comprising:
an area for replacing data recorded on the medium by logical overwrite (LOW) to update the data; and
an area for replacing defects occurring on the medium,
wherein:
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, a replacement block replacing the original block is recorded in the area for replacement by LOW, and
a defect list (DFL) entry indicating a replacement state comprises location information of the original block and location information of the replacement block,
wherein the replacement block is a recording or reproducing unit block, which comprises a data portion containing user data and an additional information portion containing the location information of the original block.
2. The medium 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 medium 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 medium of claim 3 , wherein the state information indicates whether the data in the data portion is valid sector by sector.
5. The medium of claim 1 , wherein the additional information portion is recorded to have a better error correction capability than the user data portion.
6. The medium 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; 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 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, record a replacement block replacing the original 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 original block and location information of the replacement block in order to indicate a replacement state,
wherein the replacement block comprises a data portion containing user data and an additional information portion containing the location information of the original block.
8. The apparatus of claim 7 , wherein the data portion comprises a valid data portion, and an invalid data portion in which padding data is recorded.
9. The apparatus of claim 8 , 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.
10. The apparatus of claim 9 , wherein the state information indicates whether the data in the data portion is valid sector by sector.
11. The apparatus of claim 7 , wherein the controller processes the additional information portion to be recorded to have a better error correction capability than the user data portion.
12. The apparatus of claim 7 , wherein the controller represents the location information of the original block and the location information of the replacement block using addresses on a physical space of the medium.
13. A recording/reproducing apparatus comprising:
a pickup which emits or receives a light to transfer data with respect to an information storage medium; and
a controller arranged to control the pickup to:
read a defect list (DFL) entry indicating a replacement state comprising location information of an original block and location information of a replacement block, from the information storage medium, and
read the replacement block using the defect list entry, from the information storage medium,
wherein the replacement block is a block which is recorded for replacing the original block using replacement by LOW, due to a defect occurring in the 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, and
wherein the replacement block is a recording or reproducing unit block, which comprises a data portion containing user data and an additional information portion containing the location information of the original block.