RU2467408C2 - Apparatus for recording data onto write-once disc and write-once disc - Google Patents

Abstract

FIELD: physics, computer engineering.

SUBSTANCE: write-once disc and a data recording apparatus are disclosed. The data medium includes an access information area (AIA) in which is recorded information on TDMA location in which the updated preferred information is finally recorded. Information on the TDMA location, in which the updated preferred information is recorded, is a temporary disc defect structure (TDDS).

EFFECT: cutting access time for reading updated information.

2 cl, 12 dwg

Description

Technical field

The present invention relates to a method and apparatus for recording and / or reproducing data on or from a write-once disc, and, in more detail, to a method and apparatus for recording access information to a write-once disc for faster access to information required to use a disc for a write-once, and a write-once disc used with the above method and apparatus.

State of the art

New information can be repeatedly recorded on a rewritable disc on which information has already been recorded. However, when new information is written to the disc for one-time recording, since information that has already been recorded cannot be erased or rewritten several times in the place where the information was recorded, a new place must be allocated in order to update already recorded information.

In general, only the information that was last updated is significant. Therefore, to read the information that was last updated, the update area is highlighted in the data area, and the drive detects information that was last updated by searching for the update area in which the updated information is recorded. When a large amount of information is recorded in the update area, it takes a long time to find the desired information.

On a write-once disc for which disc defect management is performed, areas for recording defect management information are generated while the write-once disc is used and information exists indicating a recording state of the write-once disc. Unlike a rewritable disc, according to the characteristic of a write-once disc, since updated information cannot be recorded repeatedly in a place in which existing information has already been recorded when updating defect management information is required, the updated information should be recorded in an empty place. Accordingly, a relatively wide update area is needed. In general, the update area is allocated in the start area or end area. However, sometimes, the update area may be allocated in the data area to increase the number of updates, as directed by the user.

When the final updated information required to use the write-once disc is recorded in the update area highlighted in the data area, and when information indicating that the update area is highlighted in the data area and information indicating the location of the update area is included in the final updated information , the final updated information or the location at which the final updated information is recorded cannot be detected even if the entire update area highlighted is viewed lead-in area or lead-out area.

Disclosure of invention

Technical solution

According to an aspect of the present invention, there is provided a write-once disc having information recorded thereon having a data structure by which the access time for reading the updated information required to use the write-once disc can be reduced.

According to another aspect of the present invention, there is also provided a method and apparatus for reproducing data by which access time for reading updated information required to use a write once disc can be reduced.

According to another aspect of the present invention, there is provided a method and apparatus for reproducing data by which access time for reading updated information required to use a write-once disc can be reduced.

Positive effects

According to the present invention, the access time for reading updated information can be reduced when a write-once disc is used on which predetermined information is updated and recorded in a new location. Also, when there are many update areas for recording updated information required to use the write-once disc, the recording device or playback device can quickly and easily determine the update area in which the final updated information is recorded among the many update areas.

Description of drawings

These and / or other aspects and advantages of the present invention will become more apparent and will be more readily appreciated from the following description of embodiments taken together with the drawings, in which:

1A and 1B are write-once disc structures according to embodiments of the present invention;

Figure 2 is a detailed structure of a write-once disc having a single recording layer, according to embodiments of the present invention;

3A and 3B are detailed write-once disc structures having a double recording layer, according to embodiments of the present invention;

4A and 4B are detailed write-once disc structures having a double recording layer, according to another embodiment of the present invention;

5 illustrates a process for recording data in a user data area and a spare area according to embodiments of the present invention;

6 is a data structure of access information according to a first embodiment of the present invention;

7 is a data structure of access information according to a second embodiment of the present invention;

8 is a data structure of access information according to a third embodiment of the present invention;

9 is a data structure of access information according to a fourth embodiment of the present invention;

10 is a data structure obtained by dividing an entire TDMA into a plurality of virtual TDMAs;

11 is a block diagram of a recording apparatus according to an embodiment of the present invention; and

12 is a flowchart illustrating a recording method according to an embodiment of the present invention.

Best mode

According to an aspect of the present invention, there is provided a write-once disc having at least one recording layer, wherein the disc includes a plurality of update areas in which predetermined updated information is recorded; and at least one access information area in which access information is recorded, where the access information indicates an update area in which the final updated information is recorded.

According to another aspect of the present invention, there is provided a method of writing data to a write-once disc, the method including writing predetermined updated information to one of a plurality of update areas allocated to the write-once disc; and recording access information indicating an update area in which the final updated information is recorded in at least one area of access information allocated to a write-once disc.

According to another aspect of the present invention, there is provided an apparatus for writing data to a write-once disc, the apparatus including a write / read module for writing or reading information to or from a write-once disc; and a controller controlling a write / read module for recording predetermined updated information in one of a plurality of update areas allocated to the write-once disc, and recording access information indicating an update area in which the final updated information is recorded in at least one access information area allocated to a write once disc.

According to another aspect of the present invention, there is provided a method for reproducing a write-once disc, the method including receiving final updated access information from at least one area of access information allocated to the write-once disc; and obtaining information indicative of an update area in which the final updated access information is recorded among a plurality of update areas allocated to the write-once disc from the final updated access information.

According to another aspect of the present invention, there is provided an apparatus for reproducing a write-once disc, the apparatus including a reader reading data recorded on the write-once disc; and a controller controlling the reader to obtain final updated access information from at least one area of access information allocated to the write-once disc, and obtain information indicating an update area in which final updated access information is recorded among the plurality of update areas allocated to the disk for write once from the final updated access information.

Additional aspects and / or advantages of the invention will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the invention.

Mode for invention

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, in which like reference numerals throughout refer to like elements. Embodiments are described below in order to explain the invention by reference to the drawings.

1A and 1B are write-once disc structures according to embodiments of the present invention. 1A is a write-once disc structure having a single recording layer, and FIG. 1B is a write-once disc structure having a double recording layer.

A write once disc having a single recording layer includes a start area, a data area, and an end area located from an inner to an outer circle.

Each of the first recording layer L0 and the second recording layer L1 of a write once disc having a double recording layer includes a start area, a data area and an end area arranged from an inner to an outer circle.

FIG. 2 is a detailed structure of a write-once disc having a single recording layer according to an embodiment of the present invention. Referring to FIG. 2, the initial area includes a first disk management area (DMA1), a second disk management area (DMA2), a first temporary disk management area (TDMA1), an access information area (AIA), and a recording conditions check area. The end area includes a third disk management area (DMA3) and a fourth disk management area (DMA4). Also, the end region may further include at least one of a temporary defect management area, a recording condition verification area, and an AIA. That is, there may be at least one of AIA, DMA, TDMA and a recording condition check area in at least one of the start areas and / or end areas.

3A and 3B are detailed write-once disc structures having a double recording layer according to an embodiment of the present invention. FIG. 3A is a structure of a first recording layer L0, and FIG. 3B is a structure of a second recording layer L1. The structure of the first recording layer shown in FIG. 3A is identical to the structure of a write-once disc having a single recording layer shown in FIG. 2. The structure of the second LI recording layer shown in FIG. 3B is similar to the structure of the first L0 recording layer. However, in the structure of the second recording layer L1, AIA, no second internal area is allocated, and two TDMAs are allocated to the second data area.

A write once disc having a double recording layer includes five TDMA, TDMA1-TDMA5. The locations and sizes of the TDMA1 and TDMA2 are well known for recording devices and / or reproducing devices. However, TDMA3, TDMA4, and TDMA5 are allocated to data areas by a user or recorder and / or playback device when a disc is initialized to use a write once disc having a double recording layer. When a temporary disc management structure (TDMS) is recorded from TDMA1, a temporary defect disc structure (TDDS) including sizes and locations of TDMA allocated to data areas is recorded in TDMA1.

4A and 4B are detailed write-once disc structures having a double recording layer, according to another embodiment of the present invention. Fig. 4A is a structure of a first recording layer L0, and Fig. 4B is a structure of a second recording layer L1. TDMA1, TDMA2, and TDMA5 are allocated to a write once disc having a double recording layer shown in FIGS. 4A and 4B. That is, in addition to the known TDMA1 and TDMA2, only the TDMA5 is allocated to the second data area by the user or the recorder and / or the playback device when the disc is initialized in order to use a write-once disc having a double recording layer.

Now, areas such as TDMA allocated to a write once disc and a process of recording data in areas will be described.

TDMA is an area where TDMSs for managing a write once disc are recorded before finalizing a write once disc. Completing a write once disc is an operation preventing the write once disc from being recorded again. When data can no longer be recorded on a write-once disc due to user selection or when data can no longer be recorded on a write-once disc, the write-once disc is completed.

TDMA includes a temporary defect list (TDFL), TDDS, and a bitmap card (SBM). TDFL includes information indicating the area in which the defect is generated, and information indicating the replacement area. TDDS manages the TDFL and includes a location indicator indicating the location where the TDFL is recorded, where the location indicator indicates the location in which the SBM is recorded, information indicating the location and sizes of spare areas allocated to the data areas, and information indicating the location and sizes TDMA allocated to data areas. SBM shows the write data state of a disc for one-time recording with a bitmap by allocating various bit values to clusters in which data is recorded in the cluster modules, which are recorded data modules, and clusters in which data is not recorded.

When a write-once disc is loaded into the recorder and / or the reproducing device, final updated TDMAs, in particular TDDS, are quickly required to use the write-once disc in the device.

Typically, when a write-once disc is loaded into a recorder and / or reproducing apparatus, the recorder and / or reproducing apparatus decides how to control the write-once disc and how to record or reproduce data by reading information from a start area and / or an end area . If the amount of information recorded in the start area and / or the end area is large, more time is taken to prepare the recording or playback after the write once disc is loaded. Therefore, TDMS is used, and TDMS is generated while data is being recorded or reproduced from a write-once disc recorded in the TDMA, which is separated from the defect management area and allocated to the start area and / or end area.

When the write-once disc is completed, the TDMS, i.e., TDFL and TDDS recorded in the TDMA, is finally recorded in the DMA, since access to information for quick use of the write-once disc is possible by allowing recording or playback by the device for reading significant information read-only from the defect management area by storing only the final relevant information among the TDFL and TDD, which were updated and recorded several times in the DMA.

5 illustrates a process for recording data in a user data area and a spare area according to an embodiment of the present invention.

Referring to FIG. 5, where A indicates a user data area, and B indicates a spare area. A method for recording user data in a user data area includes a continuous recording mode and a random recording mode. User data is recorded continuously and sequentially in a continuous recording mode, and randomly in a random recording mode. Zones (4) - (10) indicate the modules in which verification is performed after recording.

A recorder writes user data to a zone

(4) and checks if user data was recorded normally, or if a defect was generated in zone (4). If the part in which the defect was generated is found, the part is defined as a defective area, i.e. defect # 1. Also, the recorder overwrites the recorded user data in the defect # 1, in the spare area. The part in which user data that was written to the defect is overwritten is called replacement # 1. A recorder writes user data to a zone

(5) and checks whether user data was recorded normally, or if a defect was generated in zone (5). If the part in which the defect is generated is found, the part is defined as the defective area, i.e. defect # 2. Similarly, replacement # 2 corresponding to defect # 2 is generated. Also generated in the zone.

(6) defect # 3 and replacement # 3. In zone (7), the defective region does not exist, since the part in which the defect was generated was not found.

If the end of the write operation # 1 is predicted after the user data has been recorded and verified, that is, if the user presses the disc eject button or if the user data recording highlighted by the write operation is finished, the recorder records information related to defect # 1 and defect # 2, and defect # 3, which are defective areas generated in zones (4) to (7), in TDMA as TDFL # 1. Also, the management structure for managing TDFL # 1 is recorded in TDMA as TDDS # 1. A write operation is a work item defined by the intention of the user or the desired write operation. In this embodiment, the recording operation indicates the period from the moment when the write-once disc is loaded and when the predetermined information is recorded, until the moment when the write-once disc is unloaded from the recording device.

When the write once disc is reloaded, recording operation # 2 begins, the recording conditions in the recording condition verification area are checked, and user data is recorded based on the verification result. That is, during write operation # 2, user data is recorded in zones (8) to (10) in the same manner as write operation # 1, and defect # 4, defect # 5, replacement # 4 and replacement # 5 are generated. When the write operation # 2 is completed, the recorder writes information related to the defect # 4 and the defect # 5 to TDMA as TDFL # 2. Also, the management structure for managing TDFL is recorded in TDMA as TDDS # 2.

As shown in FIGS. 2-4, when a plurality of TDMA and spare areas are allocated to a write once disc, TDMA and spare areas are used in a predetermined order. For example, when a data recording path is applied to a write-once disc having a double recording layer shown in FIG. 3, which is the opposite recording path, i.e. by where data is recorded from the first inner region of the first recording layer L0 to the first outer region of the first recording layer L0, and the second inner region of the second recording layer L1 to the second outer region of the second recording layer L1, data in the spare areas are recorded from the first spare area of the first layer L0 entries. When the first spare area is filled, the second spare area, the third spare area and the fourth spare area are used in this order.

Similarly, TDMS are recorded from TDMA1 of the first recording layer L0. When TDMA1 is full, updated TDMSs are recorded in TDMA2 allocated to the second inner area of the second recording layer L1. When TDMA2 is full, new updated TDMSs are recorded in TDMA3 allocated to the first data area of the first recording layer L0. In this embodiment, TDMA1 and TDMA2 allocated to the inner regions of the recording layers are preferred for a write once disc. However, TDMA allocated to data areas may or may not be allocated by user selection. Therefore, when the TDMA allocated to the inner regions of the recording layers is full, the TDMA allocated to the data regions is used.

When the final updated TDMSs are recorded in the TDMA allocated data area, the write-once disc is ejected and the write-once disc is reloaded into the recorder. The recorder must receive the final updated TDMS in order to use the write once disc. However, the TDMS recorded in the TDMA allocated to the data areas and the drive cannot recognize the fact that the TDMS are recorded in the TDMA allocated data areas until the drive accesses the TDDS included in the TDMA.

To solve this problem, the AIA is separately allocated to a predetermined disc location for write once in this invention. Access Information (AI) is recorded in the AIA. The AI indicates the location where update information, such as TDMS, is recorded.

Also, the update information indicates information that the recording and / or reproducing devices must recognize in order to use the write once disc during the initialization period when the write once disc is loaded in the recording and / or reproducing apparatus. Also, the area in which update information is recorded is called the update area. In this embodiment, the presented update information is TDMS, and the presented update area is TDMA.

As shown in FIGS. 2-4, the AIA is preferably, but not necessarily, allocated to a predetermined location of the start region or the inner region. Also, the AIA size is preferably, but not necessarily, limited to the number of AIs recorded in the AIA, and since the number of AI updates is taken to be larger than that required to obtain the AI if the AIA size is large, or multiple AIAs are allocated.

6 is a data structure of access information (AI) according to a first embodiment of the present invention. The AI shown in FIG. 6 illustrates TDMS as update information, TDMA as an update area, and AI on a write-once disc having a double recording layer shown in FIG. 3.

Referring to FIG. 6, where the AI header includes an AI identifier indicating that the following data is AI and the number of AI updates showing the number of AI updates.

The AI includes the total number of TDMAs allocated to the write once disc, information indicative of the TDMA in which the final TDDS is recorded, and information indicative of the location of the TDMA. Each TDMA location information may include information indicating the start position and end position of each TDMA, or information indicating the start or end position and size of each TDMA. Since the TDDS includes a pointer indicating the location of the corresponding TDFL, AI includes information indicating the TDMA in which the final TDDS is recorded.

When a write-once disc according to the present invention is loaded in the drive, the drive can recognize the TDMA in which the final TDDS is recorded by accessing the AIA at an already known location and receiving the final updated AI and receiving the final TDDS from TDMA. To reduce the access time to obtain the final AI recorded in the AIA, it is preferable, but not necessary, that the AI be continuously recorded in the AIA in continuous recording mode and the number of AI updates is minimal.

According to an embodiment of the present invention, in order to reduce the number of AI updates, the AI is updated whenever the TDMA in which the final TDDS is recorded changes. Also, when information indicating the number of TDMA allocated to the write-once disc and information indicating the location of the TDMA are included in the AI, the AI is also updated when a new TDMA is highlighted, or the information indicating the location of the TDMA has changed. Also, it is preferable, but not necessary, that the same AI is recorded repeatedly in order to prepare for the fact that an error is generated in the recorded AI.

Since the AI to be updated is continuously recorded after the previous AI, even if the information indicating the detailed address where the final TDDS is recorded is not included in the AI, the recorder and / or playback device can quickly find the location where the final TDDS is recorded, by recognizing the boundary between the recorded data area and the unrecorded data area, using the track transition method, since there is a difference between the RF signal received from the recorded data area and the RF signal obtained from the unrecorded data area.

7 is an AI data structure according to a second embodiment of the present invention. The AI shown in FIG. 6 includes information indicating the locations of all the TDMAs and information indicating the TDMA in which the final TDDS is recorded. However, the AI shown in FIG. 7 includes information indicating the location of the TDMA at which the final TDDS is recorded. Information indicating the location of the TDMA at which the final TDDS is recorded can be represented as the address of the first physical sector of the first TDMA cluster and the address of the first physical sector of the last TDMA cluster. However, it will be understood by those skilled in the art that various changes to the way of presenting information indicating the location of the TDMA at which the final TDDS is recorded can be made without departing from the spirit and scope of the present invention.

Fig. 8 is an AI data structure according to a third embodiment of the present invention. The AI data structure shown in FIG. 8 is identical to the TDDS data structure. That is, TDDS is used as AI without defining a separate AI data structure. In order to use TDDS as AI, an information field indicating the location of the TDMA at which the final TDDS is recorded needs to be added to the TDDS.

9 is an AI data structure according to a fourth embodiment of the present invention. The AI data structure shown in FIG. 9 is identical to the TDDS data structure as described in the third embodiment. However, unlike the third embodiment, a flag indicating the location of the TDMA at which the final TDDS is recorded is further included in the TDDS. In this embodiment, the flag is composed of 8 bits, where 5 bits, b0-b4, indicate the TDMA in which the final TDDS is recorded, and 3 bits, b5-b7, are reserved bits. For example, you can determine that the final TDDS is written to TDMA1 when b0-b4 is '00001b', TDMA2 when b0-b4 is '00010b', TDMA3 when b0-b4 is '00100b', TDMA4 when b0-b4 is '01000b', and TDMA5 when b0-b4 is '10000b'.

A plurality of TDMA allocated to a write-once disc according to these embodiments is continuously used based on the direction of data recording. Therefore, by considering physically multiple TDMAs as one serial TDMA, one serial TDMA can be divided into multiple virtual TDMAs.

10 is a data structure obtained by dividing full TDMA into multiple virtual TDMAs. For example, in a write once disc having a double recording layer when TDMAs are used in the order of TDMA1, TDMA2, TDMA3, TDMA4 and TDMA5, and if each of TDMA1 and TDMA2 includes 2048 clusters, each of TDMA3 and TDMA4 includes 4096 clusters, and TDMA5 includes 8192 clusters; full TDMA includes 20,480 clusters. If full TDMA is divided into modules with 512 clusters, modules, or modules with 2048 clusters, full TDMA can be divided into 40, 20, or 10 virtual TDMAs.

If the size of the TDMA3 between the TDMA1-TDMA5 allocated to the write-once disc is very large, and if the final TDDS is recorded in the TDMA3, the recorder and / or player learns the fact that the final TDDS is recorded in the TDMA3 from AI, and receives the final TDDS using TDMA3 search. However, when the TDMA3 size is very large, it may take a long time to search for TDMA3 in order to obtain the final TDDS. Therefore, in order to solve this problem, the virtual TDMA concept described above is used. The size of each virtual TDMA may be the same as shown in FIG. 10. However, the size of each virtual TDMA is not limited to this embodiment.

Recording and / or reproducing devices divide the entire TDMA into a plurality of virtual TDMAs and update the AI when the virtual TDMA in which the final TDDS is recorded changes. Each of the data structures according to the first to fourth embodiments may be used as the AI data structure according to this embodiment. However, the AI of this embodiment includes information indicating the virtual TDMA in which the final TDDS is recorded, or information indicating the location of the virtual TDMA in which the final TDDS is recorded.

11 is a block diagram of a recording apparatus according to an embodiment of the present invention.

Referring to FIG. 11, where the recording device includes a write / read module 1, a controller 2, and a memory 3. The write / read module 1 writes data to the write-once disc 100 and reads the recorded data to check if a defect exists in recorded data. AIA, according to this invention, is allocated to a disc for write once 100.

For defect management, the controller 2 uses a post-write verification method to detect the part in which the defect is generated, recording data in predefined modules and checking the recorded data. Controller 2 checks where defects are generated, recording and checking user data in each module of the write operation, generates a defect list indicating where defective areas exist, as the results of the verification, stores the generated defect list in memory 3, collects many defect lists, saves many lists defects in the updated areas allocated to the disc 100 for write once, i.e. TDMA as TDFL, and further records TDDS for managing recorded TDFL in TDMA. During one recording operation, verification after recording is performed at least once, and usually several times. The list of defects obtained by performing verification after recording is temporarily stored in memory 3 as TDFL. When the write operation is completed, the controller 2 reads the TDFL stored in the memory 3, provides the TDFL to the module 1 for writing / reading, and gives the command to the module 1 for writing / reading to the TDFL in the TDMA allocated to the write-once disc 100.

When data can no longer be written to the write-once disc 100 or when the user no longer wants to write data to the data area (when the write-once disc 100 is completed), the controller 2 writes the TDFL and TDDS recorded in the TDMA to the DMA allocated to the disc for write once 100.

The controller 2 controls the module 1 for writing / reading in order to write data having a data structure according to this invention. That is, the controller 2 controls the write / read module 1 for recording predetermined updated information, i.e. A TDMS including TDFL or TDDS in one of a plurality of update areas allocated to the write-once disc 100 and to record the updated AI in the AIA, the dedicated write-once disc 100 when the AI needs to be updated.

An AI recording method according to an aspect of the present invention will now be described in detail based on the structure of the recording apparatus described above.

12 is a flowchart illustrating a recording method according to an embodiment of the present invention.

When the write-once disc 100 is loaded into the recorder, the controller 2 controls the write / read unit 1 to write predetermined user data to the write-once disc 100 in step 71.

At operation 73, it is determined whether the information generated by the verification after the recording is completed, which is performed at least once during one recording operation, will be updated. In this embodiment, the information to be updated indicates TDMS. When the TDMS is generated, the TDMS is temporarily stored in the memory 3, and when the write operation is completed, the controller 2 reads the TDFL stored in the memory 3 and provides the TDFL to the write / read module 1, and the write / read module 1 writes the TDFL in one of a plurality update areas allocated to the disc 100 for write once to operation 75. In this embodiment, the update area indicates TDMA.

Controller 2 determines whether another write operation exists in operation 77, and if another write operation exists, operations 71-77 are repeated.

If another write operation does not exist, controller 2 determines whether the AI needs to be updated in operation 79. In this embodiment, when the TDMA in which the final TDMS, and especially the final TDDS is recorded, changes when a new TDMA is allocated, or when information indicating the location of an existing TDMA is changed, AI is updated.

The controller 2 controls the write / read module 1 in order to write the AI pointing to the update area in which the final updated information is recorded among the plurality of update areas in the AIA, at least one of which is allocated to the disc 100 for write once to operation 81. It is preferable, but not necessary, that the same AI be recorded several times in case an error is generated in the recorded AI.

As described above, if the AI indicating the location where the final TDMAs are recorded is recorded in the AIA of the write-once disc 100, when the write-once disc 100 is re-loaded into the recording device or reproducing apparatus, the recording apparatus or reproducing apparatus may refer to the final TDDS more quickly and easily.

An apparatus (not shown here) for reproducing a write-once disc 100 includes an AIA in which the AI of the present invention is recorded, has a structure similar to the recorder shown in FIG. 11. However, since it is a playback device, a reader module is included in it instead of the writer / reader module 1. When the write-once disc 100 including the AIA in which the AI is recorded is loaded into the reproducing apparatus, the reproducing apparatus determines whether the write-once disc 100 is completed by referring to the DMA and determining whether data has been recorded in the DMA. If the write-once disc 100 is not complete, the playback device accesses the AIA and obtains the final AI. The recording device or playback device recognizes the TDMA in which the final TDDS is recorded from the final AI. The operations of the reproducing apparatus according to this invention can be easily understood by a person skilled in the art from the description of a write-once disc 100 including an AIA and a device for recording it.

If the write-once disc 100 is an empty disc that is not initialized, no data is written to the AIA. The recording device performs initialization in order to use the disc 100 for one-time recording. When the write-once disc 100 is initialized, a first AI having a data structure according to various embodiments as described above is recorded in the first AIA recording cluster.

Although several embodiments of the present invention have been shown and described, one skilled in the art will appreciate what changes can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. A write-once disc having at least one recording layer for use in a recording / reproducing apparatus, the disc comprising:
a plurality of temporary disc management areas (TDMA) in which updated predetermined information is recorded; and
at least one area of access information (AIA) in which information is recorded regarding the location of the TDMA in which the updated predetermined information is finally recorded,
moreover, the information regarding the location of the TDMA at which the updated predetermined information is finally recorded is a temporary disk defect structure (TDDS), and the temporary disk defect structure (TDDS) contains information that allows the device to search for a TDMA location in which the updated predetermined information is finally recorded,
in which information regarding the location of the TDMA at which the updated predetermined information is finally recorded is updated when the TDMA at which the updated predetermined information is finally recorded is changed. 2. A device for writing data to a disc for write once, the device including:
a write / read module for writing or reading information to or from a write-once disc containing a plurality of temporary disc management areas (TDMA) in which updated predetermined information is recorded; and
a controller controlling a write / read module for recording information regarding a TDMA location in which the updated predetermined information is finally recorded in at least one access information area (AIA) on the write-once disc,
moreover, the information regarding the location of the TDMA at which the updated predetermined information is finally recorded is a temporary disk defect structure (TDDS), and the temporary disk defect structure (TDDS) contains information that allows the device to search for a TDMA location in which the updated predetermined information is finally recorded,
wherein the controller controls the writing / reading unit for updating information regarding the location of the TDMA at which the updated predetermined information is finally recorded, wherein the TDMA at which the updated predetermined information is finally recorded changes.

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