JP2006521660A - Method for overwriting data on write-once information recording medium and data recording and / or reproducing apparatus for write-once information recording medium - Google Patents

Abstract

A method of overwriting data on a write-once information recording medium and a data recording and / or reproducing apparatus thereof are disclosed. The method of overwriting data on a write-once information recording medium according to the present invention includes a step of inputting an overwrite command for instructing to overwrite new data on a first section on a write-once information recording medium on which data has already been recorded. The first section is regarded as a defect area, and new data is recorded in the second section; and the updated defect management information including the position information of the first section and the position information of the second section is a write-once information recording medium And a step of recording. According to the present invention, a write-once information recording medium that cannot be physically overwritten can be overwritten using a logical method, and data already recorded on the write-once information recording medium can be changed. Or it can be updated.

Description

  The present invention relates to a write-once information recording medium, and more particularly, to a method of overwriting data on a write-once information recording medium and a data recording and / or reproducing apparatus thereof.

  The rewritable information recording medium can overwrite new data at a position where the data has already been recorded. However, since the write-once information recording medium has a characteristic that it can be recorded only once in the data recording area, it cannot be overwritten, and already recorded data cannot be deleted or changed.

  On the other hand, according to the prior art, in order to record a file system including various information about data recorded on an information recording medium, a predetermined area of a user data area on the medium is preliminarily used for recording the file system. Generally, it is determined in the area.

  In the case of a rewritable information recording medium, the area for recording the file system is always fixed by overwriting the updated file system on the file system already recorded in the predetermined area. However, the write-once information recording medium cannot be overwritten. Therefore, when the file system is updated, the updated file system must be recorded at a location other than the location where the previous file system was recorded.

  Therefore, a conventional data recording and / or reproducing device designed to reproduce only a file system recorded at a fixed position is recorded on a write-once information recording medium in which the recording position of the file system is variable. Playback compatibility problem that cannot read the file system may occur. In addition, each time the file system is updated, the updated file system is recorded at a new location on the write-once information recording medium, so that the data recording and / or playback device can search for the final file system. The problem of taking a lot of time can arise.

  Therefore, the technical problem to be solved by the present invention is to provide a method for overwriting a write-once information recording medium that cannot be physically overwritten, and a data recording and / or reproducing apparatus therefor.

  Another technical problem to be solved by the present invention is that when the predetermined information is updated on the write-once information recording medium, the predetermined information is logically overwritten on the write-once information recording medium. A logical overwriting method in a write-once information recording medium for facilitating updating and / or reproduction and a data recording and / or reproducing apparatus therefor are provided.

  In order to solve the above problems, a method for overwriting a write-once information recording medium according to an aspect of the present invention includes overwriting new data in a first section on a write-once information recording medium on which data has already been recorded. A step of inputting an overwriting command to instruct, a step of regarding the first section as a defective area, recording the new data in a second section, position information of the first section and position information of the second section Recording updated defect management information on the write-once information recording medium.

  Further, the step of recording the new data uses data recording area information for informing a position where the data is recorded and a position where the data is not recorded, and determines whether data is already recorded in the first section. It is desirable to include a step of determining.

  The data recording area information is a bit that represents a cluster in which data is recorded and a cluster in which data is not recorded using different bit values for the entire cluster on which data can be recorded on the write-once information recording medium. A map is desirable.

  Preferably, the step of recording the new data includes a step of verifying the new data after recording in the first section, and considering the first section as a defective area based on the verification result after recording.

  In addition, it is preferable that the data already recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system.

  According to another aspect of the present invention, a method for overwriting a write-once information recording medium includes a step of receiving a logical address for recording new data from a host, and a physical on the write-once information recording medium corresponding to the logical address. If data is already recorded in the first section having a target address, the first section is regarded as a defective area, and the new data is recorded in a second section having another physical address; Recording the updated defect management information including the physical address of one section and the physical address of the second section on the write-once information recording medium.

  A data recording and / or reproducing apparatus according to an aspect of the present invention includes a recording / reproducing unit that records data on a write-once information recording medium or reproduces recorded data, and the data is already recorded. If an overwrite command for instructing to overwrite new data in the first section on the write-once information recording medium is input, the first section is regarded as a defective area, the new data is recorded in the second section, A controller for controlling the recording / reproducing unit to record the updated defect management information including the position information of the first section and the position information of the second section on the write-once information recording medium. And

  And a memory for storing data recording area information that informs a position where data is recorded and a position where data is not recorded, and the control unit refers to the data recording area information and stores data in the first section. It is desirable to determine whether or not is already recorded.

  In addition, the data recording area information is expressed by using different bit values for clusters in which data is recorded and clusters in which data is not recorded for all clusters on which data can be recorded on the write-once information recording medium. It is desirable to be a bitmap.

  Further, the control unit controls the recording / reproducing unit to record and reproduce the new data in the first section, and to verify the first section based on the verification result after the recording. It is desirable to consider it as an area.

  In addition, it is preferable that the data already recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system.

  A data recording and / or reproducing apparatus according to another aspect of the present invention includes a recording / reproducing unit for recording data on a recordable information recording medium or reproducing recorded data, and the recordable information recording from a host. If a logical address for recording new data on the medium is received and data has already been recorded in the first section having a physical address on the write-once information recording medium corresponding to the logical address, the first address One section is regarded as a defective area, the recording / reproducing unit is controlled to record the new data in a second section having another physical address, and the physical address of the first section and the second section And a controller that controls the recording / reproducing unit to record the updated defect management information including a physical address on the write-once information recording medium. .

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating the structure of a write-once information recording medium having a single recording layer according to an embodiment of the present invention. Referring to FIG. 1, the recording medium 100 includes a lead-in area (LEAD_IN AREA) 120, a data area (DATA AREA) 130, and a lead-out area (LEAD_OUT AREA) 140.

  In the lead-in area 120, an area 121 for recording both temporary defect management information (TDDS: Temporary Disc Defect Structure) and space bitmap (SBM) information and temporary defect information (TDFL: Temporary Defect List) are recorded. Another region 122 is provided. In addition, spare areas (SPARE AREA) 1 133 and spare area 2 134 having a predetermined size are assigned to the head and tail of the data area 130 as areas assigned for temporary defect management, respectively.

  Although not shown separately, the area 121 in which both TDDS and SBM information are recorded can be allocated not only to the lead-in area 120 but also to at least one of the lead-out area 140 and the data area 130. It is.

  The temporary defect management and the spare area and SBM for this will be described. Defect management means that when a defect occurs in the user data recorded in the user data area 135, the user data recorded in the portion where the defect occurs is recorded again, and the data loss due to the defect is replenished. Point to.

  Defect management is roughly classified into a defect management method using linear replacement and a defect management method using skip replacement. The linear replacement means that if a defect occurs in the user data area (USER DATA AREA), the defective area is replaced with an area in the spare area provided in the data area where no defect has occurred. The skip replacement refers to sequentially using areas without defects after skipping without using areas where defects have occurred.

  The linear replacement method and the skip replacement method are mainly applied to information recording media such as DVD-RAM / RW that can be repeatedly recorded and can be recorded by a random access method.

The write-once information recording medium 100 shown in FIG. 1 also includes a spare area 1 133 and a spare area 2 in the data area 130 for defect management by a linear replacement method.
134 is assigned. When the write-once information recording medium 100 is initialized for use, a spare area 1 133 and a spare area 2 are stored in the data area 130 according to a data recording and / or reproducing apparatus or host command according to the user's selection.
134 is assigned.

  On the other hand, when the information recording medium is loaded into the data recording and / or reproducing apparatus, the data recording and / or reproducing apparatus reads information in the lead-in area and / or the lead-out area and manages the information recording medium. Know how to record / reproduce. As the amount of information recorded in the lead-in area and / or lead-out area increases, the time required to prepare for recording or reproduction after loading the information recording medium increases. Therefore, in the present embodiment, a temporary defect management information concept such as Temporary Disc Defect Structure (TDDS) and a temporary defect information concept such as Temporary Defect List (TDFL) are introduced as temporary management information.

  The TDDS may include a TDDS identifier, an update counter, position information where the final TDFL is recorded, position information where the final Disc and Drive information is stored, and size information of a spare area for replacement when a defective cluster occurs. it can.

  The TDFL may include a TDFL identifier, an update counter, a defect factor number, a defect factor, and the like. The defect factor includes state information, defect cluster position information, and alternative cluster position information. The state information includes defect information. Represents the type and replacement information, and the type of defect may be a defect cluster that needs to be replaced, a defect cluster that does not need to be replaced, a cluster in which a defect may occur, and the like.

  In the write-once information recording medium 100 shown in FIG. 1, SBM, which is data recording state information indicating the presence / absence of data recording, is recorded in cluster units. For example, the SBM is a bitmap generated by assigning a bit value “1” to a cluster in which data is recorded and assigning a bit value “0” to a cluster in which no data is recorded.

  The data recording and / or reproducing apparatus uses the SBM finally updated on the write-once information recording medium 100 and quickly confirms the data recording state on the write-once information recording medium 100, thereby improving the efficiency of medium use. Can be improved.

  In the embodiment shown in FIG. 1, the SBM is recorded in one cluster together with the TDDS, but is not limited thereto.

  The SBM is finally updated after recording other types of data including user data in order to indicate the presence or absence of data recording for each cluster of the information recording medium 100.

  FIG. 2 is a diagram showing the structure of a single recording layer write-once information recording medium 200 according to another embodiment of the present invention. Referring to FIG. 2, the write-once information recording medium 200 includes a lead-in area 220, a data area 230, and a lead-out area 240.

  A temporary defect management area (TDMA: Temporary Disc Management Area) 221 and an SBM area 222 are separately allocated to the lead-in area 220 of the write-once information recording medium. In addition, as a region allocated for temporary defect management, a spare region 1 233 and a spare region 2 234 having a predetermined size are respectively allocated to the head and tail of the data region 230.

  The TDMA 221 is an area for recording TDDS and TDFL. The SBM area 222 is an area for storing SBM data in the manner described above.

  3A and 3B are diagrams illustrating the structure of a dual recording layer write-once information recording medium 300 according to still another embodiment of the present invention. FIG. 3A is a diagram showing the structure of a single recording layer write-once medium or the structure of the first recording layer L0 of a dual recording layer write-once medium, and FIG. 3B is a diagram of a dual recording layer write-once medium. It is a figure showing the structure of the 2nd recording layer L1.

  The structure of the recording layer L0 shown in FIG. 3A is similar to that of the write-once information recording medium 200 shown in FIG. However, a separate area is not allocated for the recording layer L0 shown in FIG. 3A because of the SBM, and the SBM is recorded in the TDMA 321 together with the TDDS and the TDFL. The structure of the recording layer L1 shown in FIG. 3B is the same as that of the recording layer L0 shown in FIG. 3A. The inner area (INNER AREA) 0 320 includes the TDMA 321 of the first recording layer L0, and the inner area 1 350 includes the TDMA 351 of the second recording layer L1. The data area 0 330 includes a spare area 1 331, a user data area 333, and a spare area 2 332. The data area 1 360 includes a spare area 3 363, a user data area 365 and a spare area 4 364.

  FIGS. 4A and 4B are diagrams illustrating directions in which the spare areas 133, 134, 233, 234, 331, 332, 63, and 364 according to the present invention are used. 4A shows the case of write-once mediums 100 and 200 having a single recording layer, for example, and FIG. 4B shows the case of write-once medium 300 with a double recording layer, for example. Referring to FIGS. 4A and 4B, the data area excluding the spare area, that is, the user data areas 135, 235, and 333 are separated from the inner boundary 402 of the recording medium 100, 200, 300 in the first recording layer. Used in the direction 401 to the outer boundary 403. In the second recording layer, the user data area 365 is used from the outer boundary 403 to the inner boundary 402 direction 405 of the recording medium 300.

  As shown in FIG. 4A, in order to facilitate the expansion of the spare areas 2 135, 235, 333, the direction opposite to the user data recording direction 401, that is, the outer boundary of the recording media 100, 200, 300 Spare areas 2135, 235 and 333 are used in the direction 406 from 403 to the inner boundary 402. As shown in FIG. 4B, the spare area 4 364 is used in the direction 407 from the inner boundary 402 to the outer boundary 403 of the recording medium 300 to facilitate the expansion of the spare area 4 364.

  As will be described later, in order to perform logical overwriting using defect management according to the present invention, a wider spare area is required as compared with the conventional case. For this purpose, it is desirable to secure a wide spare area at the time of initialization of the medium, or to extend the spare area during use of the medium. In order to be able to expand the Spare Area during use of the medium, it is desirable to record data in the spare area opposite to the user data recording direction as shown in FIGS. 4A and 4B.

  Hereinafter, the write-once information recording medium 300 according to the present invention will be described based on the write-once information recording medium 300 shown in FIG. 3A and FIG. Two embodiments are described.

  According to the first embodiment, a function capable of overwriting data on a write-once information recording medium that cannot be physically overwritten is realized by using logical overwriting (Logical OverWrite).

  FIG. 5 is a block diagram of a data recording and / or reproducing apparatus 500 according to an embodiment of the present invention. Referring to FIG. 5, the apparatus according to the present embodiment includes a recording / reproducing unit 510, a control unit 520, and a memory 530. The write-once information recording medium 300 is the same as the recording medium shown in FIG. 3A.

  The recording / reproducing unit 510 records and / or reproduces data on the write-once information recording medium 300 under the control of the control unit 520, and reproduces the data in order to verify the recorded data.

  The control unit 520 performs defect management using TDMA provided in the write-once medium 300 when data is recorded and / or reproduced on the write-once medium 300.

  The controller 520 verifies the recorded data after recording the data on the write-once medium 300 in a predetermined unit, thereby searching for a portion where a defect has occurred, “verify after write”. Do the process. The control unit 520 verifies the user data after recording it in a predetermined unit, and inspects where the defective area is generated. The control unit 520 generates TDFL and TDDS that indicate where the defect area that has been clarified as a result of the inspection. The control unit 520 stores the generated TDFL and TDDS in the memory unit 530, collects a predetermined amount, and records the collected amount in the TDMA 321 provided in the write-once medium 300.

  A method for overwriting the write-once information recording medium 300 according to the present embodiment by the data recording and / or reproducing apparatus 500 according to the embodiment of the present invention shown in FIG. 5 will be described in more detail. In the present embodiment, a case where the updated file system is overwritten on the write-once information recording medium 300 will be described as an example.

  When defect management is performed by the data recording and / or reproducing apparatus 500 when data is recorded and / or reproduced on the write-once information recording medium 300, the update of the file system recorded on the write-once information recording medium 300 is defect management. It can be done by. That is, the data recording and / or reproducing apparatus to which the logical address of the write-once information recording medium 300 for recording the updated file system data is recorded together with the updated file system data from the host. Whether or not data has already been recorded at the physical address to be checked is confirmed via the SBM. The SBM is reproduced in advance from the write-once information recording medium 300 by the recording / reproducing unit 510 and stored in the memory 530. If data has already been recorded at the physical address, the physical address area is regarded as a defective area where a defect has occurred, and the updated file system is recorded in a spare area for replacement when a defect occurs.

  When the recording and / or reproducing apparatus 500 does not use the SBM, the recording and / or reproducing apparatus 500 performs defect processing on an area in which data has already been recorded and performs an updated file through a verification process after recording. Record the system in the spare area. Then, the newly updated TDDS and TDFL are recorded in the TDMA.

  FIGS. 6A to 6D are diagrams for explaining a process of overwriting the updated file system on the write-once information recording medium 300. FIG. As shown in FIG. 3A, a spare area 1 (SA1) 331 and a spare area 2 (SA2) 332 are allocated at the beginning and end of the data area (for example, the data area 330), respectively, and the top of the user data area 335 In addition, an area for recording the file system is allocated.

  FIG. 6A shows a case where the initial file system is recorded from the beginning of the user data area 335 to a predetermined position. FIG. 6B is a diagram showing a case where FS # 1, which is a file system (File System) updated first by defect management, is recorded in SA2 according to the present embodiment after the first user data 601 is recorded. It is. FIG. 6C is a diagram illustrating a case where FS # 2, which is the file system updated for the second time, is recorded at a position next to FS # 1 after the second user data 602 is recorded. FIG. 6D shows a file updated for the third time at the next position of FS # 2 by recording the updated second user data 603 in the user data area 335 and recording new user data. It is a figure showing the case where FS # 3 which is a system is recorded.

  In particular, SA2 shown in FIG. 6 (D) is expanded compared to the original SA2 shown in FIGS. 6 (A) to 6 (C). That is, when all of the SA2 allocated first is used up, the size of the SA2 allocated first can be expanded through re-initialization of the write-once information recording medium 300. In order to facilitate the expansion of the spare area (Spare Area), the use direction of the spare area, that is, the data recording direction is made opposite to the data recording direction in the user data area (for example, the user data area 335).

  According to the present embodiment, even if logical overwriting is continued for the same LSN (LSN: Logical Sector Address), the data amount of the defect list does not increase. For example, it is assumed that the physical sector address (PSN: Physical Sector Address) of the user data area corresponding to LSN00h to FFh is 100h to 1FFh, and the first file system is recorded in PSN 100h to 1FFh.

  By additionally recording user data in the write-once information recording medium 300, the host instructs the data recording and / or reproducing apparatus 500 to record the first updated file system in the same LSN 00h to FFh. To do. The data recording and / or reproducing apparatus 500 uses the SBM to know that data has already been recorded in the LSN 00h to FFh, or through a verification process after recording in the LSN 00h to FFh, the PSN of 100h to A sector corresponding to 1FFh is regarded as a defective area, and is recorded in the spare area in place of the first updated file system. FIG. 7 is a diagram showing a defect list generated by the first logical overwriting. Referring to FIG. 7, in the defect list, sectors corresponding to PSNs 100h to 1FFh in which the first file system is recorded are determined to be defective sectors, and alternative sectors thereof are PSNs 11FFFh to 11F00h in the spare area. Represents that.

  After the file system is first updated by the first logical overwriting, the user data is additionally recorded on the write-once information recording medium, so that the host sets the file system updated for the second time to the same LSN 00h. Commands the data recording and / or playback device to record to FFh. The data recording and / or reproducing device uses SBM to know that data is already recorded in LSN 00h to FFh, or through a verification process after recording in LSN 00h to FFh, PSN is 100 h to 1FFh. The sector corresponding to the above is regarded as a defective area and recorded in the spare area instead of the file system updated for the second time.

  FIG. 8 is a diagram illustrating a defect list generated by the second logical overwriting. Referring to FIG. 8, in the defect list, a sector corresponding to PSNs 100h to 1FFh in which the first file system is recorded is determined to be a defective sector, and alternative sectors are PSNs 11EFFh to 11E00h in the spare area. It represents that.

  If the defect lists shown in FIGS. 7 and 8 are contrasted, a defect list is generated each time a logical overwriting is performed on the same LSN, but the PSN of the alternative sector included in each defect list is generated. The data amount of each defect list is constant without increasing.

  Hereinafter, a second embodiment of the overwriting function implementation method in the write-once information recording medium according to the present invention will be described. In this embodiment, a file system is used to implement an overwrite function in a write-once information recording medium.

  In a write-once information recording medium, a data recording and / or reproducing device that receives a reproduction instruction for data recorded from the host to LSN 0h to FFh in order to implement an overwrite function using a file system has its logical address The data is reproduced after accessing the physical address corresponding to, for example, 100h to 1FFh, and the data is transmitted to the host.

  When the host modifies or adds data transmitted from the recording and / or reproducing apparatus 500 and attempts to record the data on a medium, the data recording and / or reproducing apparatus 500 transmits SBM, defect information, or the like to the host. . The host uses SBM, defect information, etc., and considers the logical data allocation state and physical recording state of the user data area, and distinguishes the area where data can be recorded from the area where data cannot be recorded. To select the area that can be overwritten. That is, a logical overwrite function is implemented in a write-once information recording medium by the host selecting an area that can be overwritten.

  In the write-once information recording medium according to the second embodiment described above, the overwriting method is suitable when the data storage capacity of the user data area is large. The overwriting method according to the first embodiment can prevent consumption of the user data area by recording newly overwritten data in a spare area for defect management.

  As described above, according to the present invention, a write-once information recording medium that cannot be physically overwritten can be overwritten using a logical method, and already recorded on the write-once information recording medium. It is possible to change or update the stored data. Further, according to the present invention, when updating information that is always required to be recorded at a fixed position on a medium such as a file system, the updated file system is actually recorded on the medium. Although the physical address of the file system changes with each update, since the logical address is always the same, the host system recognizes that the file system always has a fixed logical address, and approaches and replays the file system. Becomes easier.

It is a figure showing the structure of the write-once information recording medium of the single recording layer by one Embodiment of this invention. It is a figure showing the structure of the write-once information recording medium of the single recording layer by other embodiment of this invention. It is a figure showing the structure of the write-once information recording medium of the double recording layer by further another embodiment of this invention. It is a figure showing the structure of the write-once information recording medium of the double recording layer by further another embodiment of this invention. It is a figure for showing the use direction of the spare area by this invention. It is a figure for showing the use direction of the spare area by this invention. 1 is a block diagram of a data recording and / or reproducing apparatus according to an embodiment of the present invention. (A)-(D) are the figures for demonstrating the process of overwriting the file system updated to a write-once type information recording medium by one Embodiment of this invention. FIG. 7 is a diagram showing a defect list generated by the first logical overwriting according to the embodiment shown in FIGS. 6 (A) to 6 (D). It is a figure showing the defect list | wrist produced | generated by the 2nd logical overwriting by embodiment shown by FIG. 6 (A) thru | or (D).

Claims (30)

A method of overwriting data on a write-once information recording medium,
A step of inputting an overwrite command for instructing to overwrite new data in the first section on the write-once information recording medium in which data is already recorded;
Considering the first section as a defect area and recording the new data in a second section;
Recording the updated defect management information including the position information of the first section and the position information of the second section on the write-once information recording medium. Recording the new data comprises:
The method includes a step of determining whether data is already recorded in the first section by using data recording area information indicating a position where data is recorded and a position where data is not recorded. Item 2. The method according to Item 1.   The data recording area information is a bit that represents a cluster in which data is recorded and a cluster in which data is not recorded using different bit values for the entire cluster on which data can be recorded on the write-once information recording medium. The method of claim 2, wherein the method is a map. Recording the new data comprises:
Verifying after the new data recording in the first interval,
The method according to claim 1, wherein the first section is regarded as a defect area based on the verification result after the recording.   The data recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system. Method.   6. The method according to claim 5, wherein the second section is included in a spare area provided in a data area of the write-once information recording medium.   7. The method according to claim 6, wherein the updated file system information is recorded in the spare area in a direction opposite to a user data recording direction. In a method of overwriting data on a write-once information recording medium,
Receiving a logical address for recording new data from the host;
If data has already been recorded in the first section having a physical address on the write-once information recording medium corresponding to the logical address, the first section is regarded as a defective area, and the new data is transferred to another Recording in a second interval having a physical address;
Recording the updated defect management information including the physical address of the first section and the physical address of the second section on the write-once information recording medium. Recording the new data comprises:
The method includes a step of determining whether data is already recorded in the first section by using data recording area information that informs a position where data is recorded and a position where data is not recorded. Item 9. The method according to Item 8.   The data recording area information is a bit that represents a cluster in which data is recorded and a cluster in which data is not recorded using different bit values for the entire cluster on which data can be recorded on the write-once information recording medium. The method of claim 9, wherein the method is a map. Recording the new data comprises:
Verifying the new data in the first interval after recording,
9. The method according to claim 8, wherein the first section is regarded as a defect area based on the verification result after the recording.   9. The data of claim 8, wherein the data already recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system. Method. A recording / reproducing unit for recording data on the recordable information recording medium or reproducing the recorded data;
If an overwrite command is input to overwrite the first section on the write-once information recording medium on which data has already been recorded, the first section is regarded as a defective area, and the new data is The recording / reproducing unit is controlled to record in the second section, and to record the updated defect management information including the position information of the first section and the position information of the second section on the write-once information recording medium. A data recording and / or reproducing apparatus comprising: a control unit; A memory for storing data recording area information for informing a position where data is recorded and a position where data is not recorded;
The apparatus according to claim 13, wherein the control unit determines whether data is already recorded in the first section by referring to the data recording area information.   The data recording area information is a bit that represents a cluster in which data is recorded and a cluster in which data is not recorded using different bit values for the entire cluster on which data can be recorded on the write-once information recording medium. The apparatus of claim 14, wherein the apparatus is a map.   The control unit controls the recording / reproducing unit to record and reproduce the new data in the first section, and to verify the first section as a defective area based on the verification result after the recording. 14. The apparatus of claim 13, wherein the apparatus is considered.   The data recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system. apparatus.   The apparatus according to claim 17, wherein the second section is included in a spare area provided in a data area of the write-once information recording medium.   19. The control unit according to claim 18, wherein the control unit controls the recording / reproducing unit to record the updated file system information in the spare area in a direction opposite to a user data recording direction. apparatus. A recording / reproducing unit for recording data on the recordable information recording medium or reproducing the recorded data;
A logical address for recording new data on the write-once information recording medium is received from the host, and data is already recorded in the first section having a physical address on the write-once information recording medium corresponding to the logical address. If so, the first section is regarded as a defective area, the recording / reproducing unit is controlled to record the new data in the second section having another physical address, and the physical section of the first section is recorded. And a control unit for controlling the recording / reproducing unit so as to record the updated defect management information including a target address and a physical address of the second section on the write-once information recording medium. Data recording and / or playback device. A memory for storing data recording area information for informing a position where data is recorded and a position where data is not recorded;
The apparatus according to claim 20, wherein the control unit determines whether data is already recorded in the first section by referring to the data recording area information.   The data recording area information is a bit that represents a cluster in which data is recorded and a cluster in which data is not recorded using different bit values for the entire cluster on which data can be recorded on the write-once information recording medium. The apparatus of claim 21, wherein the apparatus is a map.   The control unit controls the recording / reproducing unit to record and reproduce the new data in the first section, and to verify the first section as a defective area based on the verification result after the recording. 21. The device of claim 20, wherein the device is considered.   The data recorded in the first section is a previous file system, and the new data recorded in the second section is an updated file system. apparatus. A method for managing data recorded on a write-once information recording medium,
Storing the first data in the first part of the data area;
Storing an initial file structure representing the stored first data in a second portion of the data area;
Storing second data in the first portion of the data area;
Storing the updated file structure representing the location of the first and second data stored in the first portion in a third portion of the data area.   26. The method of claim 25, wherein the direction of saving the first and second data is opposite to the direction of saving the initial file structure and the updated file structure. A method for managing data recorded on a write-once information recording medium,
Designating a first part of the data area as a user data area and storing the first data in the user data area;
Storing an initial file structure representing a physical address of the stored first data in a second portion of the data area;
Determining whether second data is data for updating the stored first data; and
If the second data is data for updating the first data, the physical address of the first data is designated as a defective area, and the designated physical address of the first data is designated. Saving to the defect management list;
Utilizing the defect management list to exclude the physical address of the initial data from an address for storing new data;
Storing the second data in the user data area;
Storing an updated file structure representing a physical address of the stored second data in a third portion of the data area.   28. The method of claim 27, wherein the direction of saving the first and second data is opposite to the direction of saving the initial file structure and the updated file structure. Storing the initial file structure includes storing a logical address corresponding to the physical address of the initial data;
The step of saving the updated file structure stores a logical address corresponding to the physical address of the second data, uses the same logical address as the logical address of the first data, and 28. The method of claim 27, wherein the data can be accessed. A method of updating data recorded on a write-once information recording medium using a host,
Obtaining initial data, system bitmap and defect information from the recording medium;
Using the host to update the initial data;
Selecting a data recordable area of the recording medium based on the system bitmap and the defect information using the host;
Transmitting the updated data to the recording medium together with a command to record the updated data in the selected data recordable area,
The defect information includes identification information of an area of the information recording medium in which the first data or other data is recorded.

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