CN101145373B - Method of recording data on write-once recording medium - Google Patents

Abstract

A method of recording a temporary defect list on a write-once recording medium, a method of reproducing the temporary defect list, an apparatus for recording and/or reproducing the temporary defect list, and a write-once recording medium. The method of recording a temporary defect list for defect management on a write-once recording medium includes recording, on at least one part of the write-once recording medium, a temporary defect list created when data is recorded on the write-once recording medium. clusters, and checking whether a defect occurs in the at least one cluster. Subsequently, the method includes re-recording data originally recorded in the defective cluster in another cluster, and recording pointer information indicating a location of the at least one cluster recording the temporary defect list on the write-once recording medium.

Description

Method of recording data on write-once recording medium

This application is a divisional application of an invention patent application with a filing date of April 29, 2004, application number 200480001415.5, and an invention title of "Method for Recording and/or Reproducing Temporary Defect List and Recording and/or Reproducing Device".

technical field

The present invention relates to a write-once recording medium, more specifically, to a method for recording a temporary defect list on a write-once recording medium, a method for reproducing a temporary defect list, a method for recording and/or Or a device for reproducing a temporary defect list, and a write-once recording medium.

Background technique

Defect management involves recording data already recorded on a position of a recording medium where a defect occurs when the data cannot be normally reproduced on another position of the recording medium, thereby preventing data loss caused by generation of a defect.

Traditionally, defect management is classified into defect management using a linear replacement method and defect management using a sliding replacement method. The linear replacement method is to replace a defective data area with a spare area that does not have a defective data area. The slip replacement method does not use a data area in which a defect occurs, and slips to and uses the next data area in which a defect does not occur.

Linear replacement and slip replacement methods have been mainly applied to discs such as DVD-RAM/RW (Digital Versatile Disc-Random Access Memory/Rewritable), on which data can be re-recorded and allowed to pass random access to record.

Recently, several solutions have been considered to perform defect management using a data recording and/or reproducing device in a write-once recording medium in which data cannot be erased or erased once written.

Defect management of a write-once recording medium using linear replacement will now be described in detail. A data recording and/or reproducing device that receives a user data recording command and user data from a host records user data in units of clusters, which are data recording units. After the data recording and/or reproducing device performs a verify-after-write operation, if a defect occurs in a cluster of the user data area where the user data is recorded, the data recording and/or reproducing device records the user data In the spare area included in the data area.

During a predetermined time interval when data is being recorded, or after a single data recording is completed, the data recording and/or reproducing apparatus creates position information of a cluster containing a defective user data area and user data recorded in the defective cluster is Temporary defect list (hereinafter referred to as TDFL) of location information of a replacement cluster of a spare area overwritten thereon. Then, the data recording and/or reproducing apparatus records the created TDFL in a temporary disc management area (hereinafter referred to as TDMA). In addition, after the data recording and/or reproducing apparatus records the created TDFL in the TDMA, it records pointer information indicating a location where the TDFL is recorded.

When the write-once recording medium is reloaded into the recording and/or reproducing device, the data recording and/or reproducing device reads the TDFL from the write-once recording medium and stores the read TDFL in the memory. When additional data is recorded in the write-once recording medium, if a new defective cluster is generated, the data recording and/or reproducing apparatus rewrites the data recorded in the defective cluster into a replacement cluster in the spare area. Thereafter, the data recording and/or reproducing apparatus creates an updated TDFL containing position information of a newly generated defective cluster and position information of a replacement cluster corresponding to the newly generated defective cluster in addition to the TDFL stored in the memory, recording The updated TDMA, and pointer information indicating the location where the updated TDFL is recorded is recorded.

When a write-once recording medium is loaded into a data recording and/or reproducing device in order to reproduce user data, the data recording and/or reproducing device first accesses the TDMA, obtains pointer information indicating a position where the updated TDFL is recorded, and obtains the updated TDFL. The data recording and/or reproducing device can then reproduce user data without error by referring to the updated TDFL.

As described above, since the TDFL is key information for reproduction of user data, the TDFL should be recorded with high reliability. Therefore, during recording of TDFL, the verify-after-write operation is performed in the same manner as during recording of user data. Therefore, if a defective cluster is generated, data recorded in the defective cluster is rewritten in another cluster of the TDMA.

According to the prior art, if the size of the TDFL corresponds to at least two clusters and the TDFL is recorded in at least two clusters, a verify-after-write operation is performed, and if a defective cluster is generated, the TDFL is rewritten to other clusters middle. However, TDMA is smaller than a data area, and the amount of data that can be stored in TDMA is not large. Therefore, when defect management is performed on TDFL according to the prior art, TDMA is quickly used up.

Contents of the invention

technical solution

An aspect of the present invention is to provide a method and apparatus for recording a TDFL in a write-once recording medium with high reliability and improved utilization of an area allocated for recording the TDFL.

An aspect of the present invention is to provide a method and apparatus for reproducing a TDFL recorded on a write-once recording medium with high reliability and improvement of an area allocated for recording the TDFL.

An aspect of the present invention is to provide a write-once recording medium for storing a TDFL with high reliability and improvement of an area allocated for recording the TDFL.

Beneficial effect

According to the present invention, it is possible to more efficiently use an area of a write-once recording medium and to record and reproduce a TDFL more reliably. Specifically, a post-write verification process is performed during recording of the TDFL, and if a defective cluster is generated, the TDFL is rewritten in another cluster. Therefore, TDFL can be recorded with high reliability. Here, when a defect is generated during recording of a TDFL, data recorded in a defective cluster is rewritten to a replacement cluster, instead of re-recording the entire TDFL, pointer information indicating the position of the cluster in which the TDFL is normally recorded is included in TDDS, and TDSS is recorded in TDMA. Therefore, the TDMA space will not be exhausted quickly.

Description of drawings

FIG. 1 shows the structure of a write-once recording medium according to an embodiment of the present invention;

2 is a block diagram of a data recording and/or reproducing device according to an embodiment of the present invention;

3 is a flowchart illustrating a method for recording a TDFL according to an embodiment of the present invention;

FIG. 4 is a diagram for explaining in detail creation of a TDFL according to a verify-after-write process;

Figure 5 shows an exemplary TDFL;

6 is a diagram for explaining TDFL post-recording verification processing according to an embodiment of the present invention;

7 is a diagram for explaining TDFL post-recording verification processing according to an embodiment of the present invention;

FIG. 8 shows exemplary pointer information indicating a position of a TDFL according to an embodiment of the present invention; and

FIG. 9 is a flowchart illustrating a method of reproducing a TDFL according to an embodiment of the present invention.

best practice

According to an aspect of the present invention, there is provided a method of recording a temporary defect list used for defect management in a write-once recording medium, the method comprising: recording a temporary defect list created when data is recorded on the write-once recording medium A defect list is recorded in at least one cluster of the write-once recording medium, and it is checked whether a defect occurs in the at least one cluster; the data recorded in the defective cluster is recorded in another cluster, and the temporary defect recorded therein will be indicated Pointer information of the location of the at least one cluster of the list is recorded on the write-once recording medium.

Additional aspects and/or advantages of the present invention will be set forth in part in the following description, and some will be clear from the description, or can be learned through practice of the present invention.

According to an aspect of the present invention, the temporary defect list includes location information of a defective cluster and location information of a replacement cluster for replacing the defective cluster.

According to an aspect of the present invention, the pointer information includes position information of the other cluster that is not a defective cluster.

According to an aspect of the present invention, pointer information is included in the temporary disc definition structure. The temporary defect list and the temporary disc definition structure may be recorded in a temporary disc management area provided on the write-once recording medium.

According to another aspect of the present invention, there is provided an apparatus for recording and/or reproducing data, the apparatus comprising: a recording/reading unit for recording data on or from a write-once recording medium reading data; and a control unit for controlling the recording/reading unit to record, on at least one of the write-once recording media, a temporary defect list for defect management created when the data is recorded on the write-once recording medium. in the cluster. The control unit also checks whether a defect occurs in the at least one cluster, the control recording/reading unit records the data recorded in the defective cluster in another cluster, and the control recording/reading unit will instruct to record the temporary defect list therein The pointer information of the location of the at least one cluster is recorded on the write-once recording medium.

According to an aspect of the present invention, the temporary defect list includes location information of a defective cluster and location information of a replacement cluster for replacing the defective cluster.

According to an aspect of the present invention, the pointer information includes position information of the other cluster that is not a defective cluster.

According to an aspect of the present invention, pointer information is included in the temporary disc definition structure.

According to an aspect of the present invention, a temporary defect list and a temporary disc definition structure are recorded in a temporary disc management area provided on a write-once recording medium.

According to another aspect of the present invention, there is provided a method for reading a temporary defect list for defect management recorded on a write-once recording medium, the method comprising: obtaining from the write-once recording medium the location indicating the recording of the temporary defect list and accessing at least one cluster recording the temporary defect list according to the pointer information and reading the temporary defect list.

According to an aspect of the present invention, the pointer information indicates the location of at least one cluster where the temporary defect list is recorded.

According to an aspect of the invention, the pointer information indicates the location of each of the at least one cluster.

According to an aspect of the present invention, during recording of the temporary defect list, if a defect is generated in at least one cluster and data is recorded in another cluster, the pointer information may include location information of the other cluster which is not a defective cluster.

According to an aspect of the present invention, the temporary defect list includes location information of a defective cluster and location information of a replacement cluster for replacing the defective cluster.

According to an aspect of the present invention, pointer information is included in the temporary disc definition structure. The temporary defect list and the temporary disc definition structure may be recorded in a temporary disc management area provided on the write-once recording medium.

According to another aspect of the present invention, there is provided an apparatus for reproducing data, the apparatus comprising: a reading unit for reading data recorded on a write-once recording medium; and a control unit; for controlling reading The unit reads pointer information indicating a location where a temporary defect list for defect management is recorded from the primary recording medium, accesses at least one cluster where the temporary defect list is recorded according to the pointer information, and reads the temporary defect list.

According to an aspect of the present invention, the pointer information indicates the location of the at least one cluster where the temporary defect list is recorded. The pointer information may indicate the location of each of the at least one cluster.

According to an aspect of the present invention, during recording of the temporary defect list, if a defect is generated in at least one cluster and data is recorded in another cluster, the pointer information includes location information of the other cluster which is not a defective cluster.

According to an aspect of the present invention, the temporary defect list may include location information of a defective cluster and location information of a replacement cluster for replacing the defective cluster.

According to an aspect of the present invention, pointer information is included in the temporary disc definition structure. The temporary defect list and the temporary disc definition structure may be recorded in a temporary disc management area provided on the write-once recording medium.

According to another aspect of the present invention, a write-once recording medium is provided, comprising: at least one user data area for recording user data; at least one spare area for replacing when a defect is generated in the user data area; and at least one temporary disk management area for recording a temporary defect list for defect management and pointer information indicating a location of at least one cluster in which the temporary defect list is recorded.

According to an aspect of the present invention, the temporary defect list includes position information of a defective cluster of a user data area generating a defect and position information of a replacement cluster of a spare area for replacing the defective cluster.

According to one aspect of the present invention, when the temporary defect list is recorded in at least one cluster of the temporary disk management area, if a defect is generated in the at least one cluster and data is recorded in another cluster, the pointer information includes The location information of the other cluster of the cluster. Pointer information may be included in the temporary disc definition structure.

Embodiments of the present invention

Embodiments of the invention will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

FIG. 1 shows the structure of a write-once recording medium 100 according to an embodiment of the present invention. The write-once recording medium 100 shown in FIG. 1 has a single recording layer including a lead-in area, a data area, and a lead-out area.

In the lead-in area, disk management area 1 (DMA 1), disk management area 2 (DMA 2), main temporary disk management area (TDMA), write condition test area, and drive information area are set. In the data area, a spare area 1 and a spare area 2 for replacing a defective cluster generated in the user data area, a secondary TDMA, and a user data area are provided. In the lead-out area, disk management area 3 (DMA 3) and disk management area 4 (DMA 4) are set.

TDFL and Temporary Disc Definition Structure (hereinafter referred to as TDDS) are recorded in Primary TDMA and Secondary TDMA. The TDDS includes recordable location information of the write condition test area, write protection information, and location and/or size information of the spare areas 1 and 2 allocated to the data area. Specifically, in an aspect of this embodiment, the TDDS includes pointer information indicating the location of the TDFL. The TDDS and pointer information indicating the location of the TDFL will be described in detail later.

TDFL and TDDS are first recorded in the main TDMA. TDFL and TDDS are recorded in the secondary TDMA after the primary TDMA is completely drained. According to a user command or a command from a data recording and/or reproducing device, the sub-TDMA included in the data area may or may not be allocated in order to enable the user or the producer of the data recording and/or reproducing device to more effectively use a write-once into the recording medium.

When the write-once recording medium 100 is loaded into a data recording and/or reproducing apparatus as shown in FIG. 2 , the data recording and/or reproducing apparatus performs initialization to use the write-once recording medium 100 . In other words, the data recording and/or reproducing apparatus reads the information recorded in the lead-in area and/or the lead-out area, and determines how to manage the write-once recording medium 100 and how to record data on the write-once recording medium 100 or How to reproduce data from the write-once recording medium 100 . When the amount of data recorded in the lead-in area and/or the lead-out area increases, the time required for the data recording and/or reproducing apparatus to prepare for a recording or reproducing process after the write-once recording medium 100 is loaded also increases. To solve this and/or other problems, the concepts of TDDS and TDFL were introduced.

In other words, TDFL and TDDS are updated and recorded in TDMA before the write-once recording medium 100 is finalized. After the write-once recording medium 100 is finalized, meaningfully updated TDFL and TDDS are recorded in one of the DMAs 1 to 4 as a defect list (DFL) and a defect definition structure (DDS). In addition, the write-once recording medium 100 can be reproduced in an apparatus for reproducing the rewritable medium 100 by recording meaningfully updated TDFL and TDDS in the DMAs 1 to 4.

FIG. 2 is a block diagram of a data recording and/or reproducing apparatus according to an embodiment of the present invention. Referring to FIG. 2 , the data recording and/or reproducing apparatus includes a recording/reading unit 1 , a control unit 2 , and a memory 3 . The write-once recording medium 100 has the same structure as the write-once recording medium having a single recording layer shown in FIG. 1 .

The recording/reading unit 1 records data on and/or reproduces data from the write-once recording medium 100 according to the control of the control unit 2 . During data recording, the recorded data is read out in order to verify the recorded data.

The control unit 2 controls the overall operation of the data recording and/or reproducing device. In addition, when data is recorded on and/or reproduced from the write-once recording medium 100, the control unit 2 creates an updated TDFL, records the updated TDFL on the write-once recording medium 100 , and record TDDS including pointer information indicating the location of the updated TDFL in the TDMA, thereby performing defect management. When not required, it should be understood that the control unit 2 may be a general purpose or special purpose computer.

When the write-once recording medium 100 is initialized for use, the updated TDFL and TDDS read out from the write-once recording medium 100 are stored in the memory 3 . Thereafter, if new user data is recorded, the defect management is performed again, and the control unit 2 creates, in the TDFL stored in the memory 3, a location information including a new defective cluster and a replacement cluster corresponding to the new defective cluster. A new updated TDFL of location information, the updated TDFL is recorded in the TDMA, and pointer information indicating a location where the updated TDFL is recorded is recorded in the TDMA.

A method of recording TDFL on the write-once recording medium 100 according to an embodiment of the present invention, which is performed by the data recording and/or reproducing apparatus shown in FIG. 2 , will now be described with reference to FIG. 3 .

FIG. 3 is a flowchart illustrating a method of recording a TDFL according to an embodiment of the present invention.

Although not shown in FIG. 3 , initialization is performed to use the write-once recording medium 100 when the write-once recording medium 100 is loaded into a data recording and/or reproducing apparatus. In other words, the control unit 2 reads the updated TDFL and TDDS from the write-once recording medium 100 and stores the read TDFL and TDDS in the memory 3 .

Thereafter, if user data and a user data recording command are input to the write-once recording medium 100 from a host computer (not shown), the control unit 2 records user data on the write-once recording medium 100 in predetermined units, and executes Verify after write operation to verify the recorded data.

During a predetermined time interval when data is being recorded, or after a single data recording is completed, the data recording and/or reproducing apparatus creates a file containing position information of a new defective cluster and position information of a replacement cluster corresponding to the new defective cluster. A new updated TDFL, the updated TDFL is recorded in the TDMA, and a TDDS including pointer information indicating a location where the updated TDFL is recorded is recorded in the TDMA.

FIG. 4 is a diagram for explaining in detail creation of a TDFL according to a verify-after-write process. Here, data is handled in units of sectors or clusters. A sector is the smallest unit of data that can be managed by a computer's file system or an application program. A cluster is the smallest unit of data that can be physically recorded on a disc at one time. Usually, at least one sector forms a cluster.

Sectors are subdivided into physical sectors and logical sectors. A physical sector is a space of a disc in which data corresponding to a sector is recorded. The address used to find the physical sector is called a Physical Sector Number (PSN). A logical sector is a sector unit used to manage data in a file system or application. Likewise, logical sector numbers (LSNs) are assigned to logical sectors.

A data recording and/or reproducing device uses the PSN to find the location of data to be recorded on the write-once recording medium 100 or to be reproduced on the write-once recording medium 100, in a computer or an application program for recording or reproducing the data All data is managed in units of logical sectors, and the location of data is found using LSN. The relationship between LSN and PSN is mapped by the control unit 2 according to defect generation and recording data start position.

Referring to FIG. 4, A represents a user data area, and B represents a spare area. In the user data area A and the spare area B, there are a plurality of physical sectors (not shown) to which PSNs are sequentially assigned. LSNs are allocated to at least one physical sector unit. However, the LSN is allocated to the replacement area of the spare area B in addition to the defective area of the user data area A where a defect occurs. As a result, although a physical sector and a logical sector have the same size, if a defective area is generated, PSN and LSN become different.

User data is recorded in the user data area A according to a continuous recording mode or a random recording mode. In continuous recording mode, user data is recorded sequentially and continuously. In the random recording mode, user data is not necessarily recorded continuously, but is recorded randomly. ① to ⑦ indicate unit areas in which a verify-after-write operation is performed.

The data recording and/or reproducing apparatus records user data in the unit area ①, the data recording and/or reproducing apparatus returns to the beginning of the unit area ① and checks whether the user data is normally recorded or whether a defect is generated. If a cluster in which a defect is generated is found, the cluster is identified as a defective cluster and designated as a defective area, ie, defect #1, as shown in FIG. 4 .

In addition, the data recording and/or reproducing apparatus rewrites the user data recorded in the defect #1 into the spare area B. A part of the spare area B in which user data is rewritten is designated as replacement #1. Then, after recording the user data in the unit area ②, the data recording and/or reproducing apparatus returns to the beginning of the unit area ② and checks whether the user data is normally recorded or whether a defect is generated. If at least one cluster in which a defect is generated is found, the at least one cluster is designated as a defect ②. In the same manner as above, replacement #2 corresponding to defect #2 is specified. In addition, in the unit area ③, a defective area, ie, defect #3 and replacement #3 corresponding to defect #3 are designated. In the cell area ④, no defect is found and there is no defect area.

After the recording and inspection are completed up to the unit area ④, if it is desired to terminate the recording operation #1 (for example, if the user presses the eject button or the recording of the user data assigned to the recording operation #1 is completed), the data recording and/or Or the reproducing apparatus creates TDFL#1 in the previous TDFL stored in the memory 3, and the position information of defects #1 to #3 generated in the cell areas ① to ④ in TDFL#1 and corresponding to defects #1 to #3 The position information of replacement #1 to #3 is updated.

When the write-once recording medium 100 is reloaded into the data recording and/or reproducing apparatus, the control unit 2 reads the previously recorded TDFL #1 from the write-once recording medium 100, and stores the read TDFL #1 in the memory 3 in. Thereafter, once recording operation #2 starts, in the same manner as in recording operation #1, data is recorded and defect management is performed.

In other words, in recording operation #2, verification after recording user data is performed from the unit areas ⑤ to ⑦, and therefore, defects #4 and #5 and corresponding replacements #4 and #5 are specified. After the recording operation #2 is terminated, the data recording and/or reproducing apparatus creates TDFL#2 in the previous TDFL#1 stored in the memory 3, the position information and replacement # of defects #4 and #5 in TDFL#2 The position information of 4 and #5 are updated.

Figure 5 shows an exemplary TDFL. Referring to FIG. 5, location information of all defective clusters on the write-once recording medium 100 is included in the first column of the TDFL, and location information of replacement clusters corresponding to the defective clusters is included in the second column of the TDFL. In an aspect of this embodiment, the location of the defective or replacement cluster is indicated using the PSN of the respective first sector of the defective or replacement cluster. However, according to aspects of the present invention, the location of the defective or replacement cluster may be indicated using the PSN of the respective last sector of the defective or replacement cluster or using an index indicating the defective or replacement cluster.

Referring back to FIG. 3, once the TDFL is created as described above, the control unit 2 records the created TDFL in at least one cluster of the TDMA and checks the recorded TDFL (operation S510). According to the result of the check, if a defective cluster is generated among the clusters recording the TDFL, the control unit 2 rewrites the data recorded in the defective cluster into another cluster of the TDMA (operation S530).

Two exemplary embodiments of TDFL post-recording verification will now be described.

FIG. 6 is a diagram of post-recording verification of a TDFL according to an embodiment of the present invention. According to the illustrated embodiment of the present invention, when a TDFL whose size is equal to the size of a plurality of clusters is recorded in TDMA, the entire TDFL is recorded and then checked.

Referring to FIG. 6, the size of the TDFL is three clusters including a first cluster 210, a second cluster 230, and a third cluster 250, and the TDFL is recorded in the three clusters and then checked. According to the result of the inspection, it is determined that a defect is generated in the second cluster 230 . Therefore, the data recorded in the second cluster 230 is rewritten in the cluster 270 immediately after the third cluster 250 . After the inspection of the cluster 270, if it is determined that no defect is generated in the cluster 270, the recording of the TDFL is terminated, and pointer information indicating the position of the cluster in which the TDFL is recorded is included in the TDDS, and the TDDS is recorded in the TDMA . At this time, the pointer information includes pointers indicating the positions of the first cluster 210 and the third cluster 250 where no defect is generated during the initial recording and the position of the cluster 270 replacing the defective second cluster 230 .

FIG. 7 is a diagram for explaining post-recording verification of a TDFL according to another embodiment of the present invention. According to the illustrated embodiment of the invention, the TDFL has a size of three clusters. TDFL is recorded in the first cluster 310 and then checked. According to the result of the inspection, it was determined that no defect was generated in the first cluster 310 . TDFL is recorded in the second cluster 330 and checked. According to the result of inspection, it is determined that a defect is generated in the second cluster 330 . Accordingly, the TDFL recorded in the second cluster 330 is rewritten in the cluster 350 immediately following the defective second cluster 330 . After the verification of the cluster 350, if it is determined that no defect is generated in the cluster 350, the TDFL is recorded in the third cluster 370 and verified. After checking the third cluster 370, if it is determined that no defect is generated, the recording of the TDFL is terminated, and pointer information indicating the location of the cluster in which the TDFL is recorded is recorded in the TDDS, and the TDDS is recorded in the TDMA. As in the embodiment of FIG. 6 , the pointer information includes pointers indicating the positions of the first cluster 310 and the third cluster 370 that do not generate defects during initial recording and the position of the cluster 350 that replaces the defective second cluster 330 .

FIG. 8 illustrates exemplary pointer information indicating a location of a TDFL according to an aspect of the present invention. The pointer information shown in FIG. 8 includes k pointers 410 , 430 , and 450 . The data recording and/or reproducing apparatus sequentially records TDFL in k clusters by reproducing the pointer information shown in FIG. 8, and the positions of the k clusters can be seen.

In this embodiment, the n-th cluster pointer (n is an integer ranging from 1 to k) of TDFL has a size of 4 bytes. In addition, pointer information is included in TDDS. In other words, the TDDS includes pointer information indicating the location of the TDFL, information on a recordable location of the write condition test area, write protection information, and location and/or size information of a spare area allocated to the data area.

Since the TDDS should include pointer information indicating the location of the TDFL, the TDDS should always be recorded after the TDFL is recorded.

As described above, according to the method and apparatus for recording a TDFL, it is possible to record a TDFL with high reliability by performing a post-write verification during recording of a TDFL and rewriting the TDFL into another cluster if a defective cluster is generated. In addition, when a defect is generated during recording of a TDFL, only data recorded in a defective cluster is recorded in a replacement cluster instead of re-recording the entire TDFL. Referring to FIG. 3 , pointer information indicating a location of a cluster in which the TDFL is normally recorded is included in the TDDS, and the TDDS is recorded in the TDMA in operation S550. Therefore, memory space in TDMA can be saved.

A method and apparatus for reproducing a TDFL according to an embodiment of the present invention will now be described.

An apparatus for reproducing TDFL uses the data recording and/or reproducing apparatus shown in FIG. 2 . However, if the device for reproducing TDFL is a reproduction-only device, the recording/reading unit 1 and the control unit 2 may only perform data reading.

FIG. 9 is a flowchart illustrating a method of reproducing a TDFL according to an embodiment of the present invention. Although not shown in the drawings, when the write-once recording medium 100 in which user data, TDFL, and TDDS are recorded according to the method described above is loaded into a data recording and/or reproducing apparatus, the control unit 2 performs initialization to use The recording medium 100 is written once. In other words, basic data required to use and manage the write-once recording medium 100 is read from the write-once recording medium 100 .

Specifically, after the updated TDDS is located and read, pointer information indicating the location of the updated TDFL is obtained from the updated TDDS (operation S610). The pointer information indicating the position of the updated TDFL has the structure shown in FIG. 8 .

Since the control unit 2 can obtain the location of the cluster where the updated TDFL is recorded and the order in which the TDFL is recorded in the cluster from the pointer information, it reads the updated TDFL (operation S630). The control unit 2 stores the updated TDDS and TDFL read from the write-once recording medium 100 in the memory 3 . The control unit 2 can reproduce the user data recorded on the write-once recording medium 100 without defects by referring to TDDS and TDFL stored in the memory 3 .

The present invention can also be embodied as computer readable codes in a computer readable recording medium. The computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored. Such computer-readable recording media are ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage, and transmission via carrier waves such as the Internet. Also, the computer-readable recording medium may be distributed among computer systems connected via a network, and computer-readable codes may be stored thereon and executed in a distributed manner.

In addition, it should be understood that the method of the present invention may be used in various types of media in which TDMA is to be stored, including writable optical media (e.g. CD-R, DVD-R), rewritable media (e.g. CD-R/W, DVD-R/W, DVD-RAM), magnetic and magneto-optical media, and next-generation DVDs such as Blu-ray Disc, Advanced Disc (AOD), E-DVD.

While certain embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made in the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents .

Claims (4)

1. A method for recording data on a write-once recording medium, the method comprising: recording a temporary defect list for defect management in a plurality of clusters of the write-once recording medium, and checking whether a defect is generated in at least one cluster; recording the data recorded in the defective cluster in the replacement cluster; Information indicating the positions of the replacement cluster and the plurality of clusters other than the defective cluster is recorded in the temporary disc definition structure. 2. The method of claim 1, wherein the temporary defect list includes location information of defective user data and location information of replacement data corresponding to the defective user data. 3. The method of claim 1, wherein the step of recording and checking comprises: recording the temporary defect list in units of clusters, and checking whether defects are generated in the clusters. 4. The method of claim 1, wherein the temporary defect list and the temporary disc definition structure are recorded in a temporary disc management area provided on the write-once recording medium.

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