JP4795938B2 - Defect management method for information recording medium, information recording medium drive device, and information recording medium - Google Patents

Abstract

A method of and drive for recording medium defect management, and a defect managed recording medium. The defect management method includes: writing first state information that specifies that an update cycle of a temporary defect management structure (TDMS) is open when updating of the TDMS begins, the TDMS containing information regarding temporary defect management; updating the TDMS when data is written to or read from information storage medium; and writing second state information that specifies that the update cycle of the TDMS is closed, when the updating of the TDMS is completed.

Description

  The present invention relates to an information recording medium defect management method, an information recording medium drive device, and an information recording medium thereof.

  Defect management means that when user data recorded in the user data area of the information recording medium has a defect, the user data recorded in the portion where the defect has occurred is further recorded to prevent data loss due to the occurrence of the defect. Point to.

  Conventionally, defect management is roughly divided into a defect management method using linear replacement and a defect management method using interlaced replacement. The linear replacement means that if a defect occurs in the user data area, this defective area is replaced with an area in the spare area provided in the data area where no defect has occurred. Interlaced replacement refers to the sequential use of a region where no defect has occurred after jumping without using a region where a defect has occurred.

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

  In the case of a WORM (write once read menu) type information recording medium (hereinafter referred to as a write once type medium), data cannot be repeatedly recorded at the same position, and the efficiency of the medium having a limited recording capacity is high. Defect management is very important. Recently, a method for realizing defect management of a write-once medium by a drive has been considered.

  The defect management method of the write-once medium will be described in more detail. The drive records data on the write-once medium in a predetermined unit by a post-recording verification (verifier after write) method, and then verifies the recorded data. To find the position on the write-once medium where the defect occurred. The drive further records the data recorded at the position where the defect has occurred in the spare area, and informs the position where the defect has occurred and the position of the newly replaced spare area (TDFL: temporary defect list), and Temporary defect management information (TDDS) informing the position where the TDFL is recorded is generated. TDFL and TDDS are collectively referred to as a temporary defect management structure (TDMS: temporary defect management structure).

  The drive stores the generated TDFL or TDDS in a memory, collects a predetermined amount, and records it in a temporary defect management area (TDMA: temporary defect management area) provided in the write-once medium. The TDMS is updated by continuing to record data on the write-once medium.

  If no more data can be recorded on the write-once medium, or if the user does not wish to record any more data on the write-once medium, the write-once medium is finalized. When the write-once medium is finalized, finally valid TDMS recorded in the TDMA is copied to a defect management area (DMA: defect management area).

  However, when an abnormal situation occurs in which the power supplied to the drive is interrupted due to a power failure or the like, there is a problem that the defect management of the information recording medium by the drive is not performed correctly. That is, if the drive is turned off due to a power failure before the TDFL or TDDS generated by recording data on the write-once medium is recorded in the TDMA, the TDMS will not be updated correctly. Furthermore, if the write-once medium is further loaded into the drive to record data after power-down, the drive will check if power-down has occurred while using the write-once medium previously. Since I don't know, there is a problem that I can't deal with it properly.

  Therefore, the technical problem to be solved by the present invention is to easily determine whether or not the defect management by the drive is terminated abnormally due to an unforeseen abnormal situation during data recording on the information recording medium. The present invention provides an information recording medium defect management method that can be understood.

  Another technical problem to be solved by the present invention is a drive device that can easily determine whether or not defect management by a drive is terminated abnormally due to an unpredictable accident during data recording on an information recording medium. Is to provide.

  Another technical problem to be solved by the present invention is to provide an information recording medium that can easily determine whether or not defect management by a drive is abnormally terminated due to an unpredictable accident during data recording. There is a place to do.

  In order to solve the above-mentioned problem, the defect management method for an information recording medium according to the present invention indicates that the update cycle of the TDMS is open when the update of the TDMS including information on temporary defect management is started. (1) a step of recording state information, a step of updating TDMS by recording / reproducing data on / from the information recording medium, and the update cycle of TDMS is closed when the update of TDMS is completed. Recording second state information indicating the above.

  The first status information can be recorded by a TDMS update cycle open command or a data recording or reproducing command.

  The updating may include recording the first status information in association with the updated TDMS.

  The second state information can be recorded by an eject command of the information recording medium.

  In order to solve the above-described problem, the defect management method for an information recording medium according to another aspect of the present invention provides that the information is updated if data update is started by recording / reproducing data on / from the information recording medium. Recording the first state information indicating that the update cycle is open in the area of the information recording medium, and the information generated by recording / reproducing data on / from the information recording medium, Recording and updating the information recording medium, and recording the second state information indicating that the update cycle of the information is in a closed state in the area when the information update is completed.

  In order to solve the other problems, a drive apparatus according to another aspect of the present invention includes a pickup unit for recording / reproducing data on / from a loaded information recording medium, and an update of a TDMS including information on temporary defect management. Is started, first state information indicating that the TDMS update cycle is in an open state is recorded in an area provided in the information recording medium, and data is recorded / reproduced on / from the information recording medium When the TDMS is updated, and the TDMS update is completed, the control unit controls the pickup unit to record second state information indicating that the TDMS update cycle is in the closed state in the area. With.

  The control unit may control the pickup unit to record the first state information in the predetermined area by a TDMS update cycle open command or a data recording or reproduction command.

  In addition, when updating the TDMS by recording / reproducing data on / from the information recording medium, the control unit records the first state information in the area in association with the updated TDMS. In addition, the pickup unit can be controlled.

  Further, the control unit can control the pickup unit to record the second state information in the area by an eject command of the information recording medium or a TDMS update cycle close command.

  In order to solve the other problems, the drive apparatus according to the present invention records / reproduces data to / from the information recording medium and a pickup unit that records / reproduces data to / from the loaded information recording medium. When the information update is started, the first status information indicating that the update cycle of the information is in an open state is recorded in the area of the information recording medium, and the data is recorded on / from the information recording medium. When the information generated by reproduction is recorded and updated on the information recording medium and the update of the information is completed, second state information indicating that the update cycle of the information is in the closed state is stored in the area. And a control unit for controlling the pickup unit.

  In order to solve the still another problem, an information recording medium according to the present invention is an information recording medium provided with a lead-in area, a user data area, and a lead-out area, and includes TDMS information including information on temporary defect management, and TDMS update cycle state information indicating whether the TDMS update cycle is in an open state or a closed state is recorded.

  The TDMS includes a TDDS and a TDFL, and the update cycle state information of the TDMS is included in the TDDS and can be recorded.

  In addition, at least one TDMA is provided in at least one of the lead-in area, the user data area, and the lead-out area, and the update cycle state information of the TDMS and the TDMS can be recorded in the TDMA.

  In order to solve the further another problem, an information recording medium according to another aspect of the present invention is information related to data recording / reproduction, information generated during data recording / reproduction, and the information Update cycle state information indicating whether the update cycle is open or closed is recorded in association with the information.

  In order to solve the further another problem, the present invention provides a method for determining whether or not data recording on an information recording medium is terminated abnormally due to an abnormal situation, the method comprising: , When the TDMS update is completed, the method includes reading second state information indicating whether the TDMS update cycle is closed, and the first state information indicating that the TDMS update cycle is open: It is recorded at the start of updating the TDMS in which information on temporary defect management is recorded, and the TDMS is updated when data is recorded / reproduced on / from the information recording medium.

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

  In this embodiment, the defect management according to the present invention will be described by taking the case of a write-once medium as an information recording medium.

  FIG. 1 shows a data structure of a write-once medium with a single recording layer for defect management according to the present invention. Referring to FIG. 1, a single recording layer write-once medium is provided with a lead-in area, a data area, and a lead-out area. In the lead-in area, DMA1 and DMA2, which are defect management areas, a recording condition test area, a primary TDMA, and a drive information area are provided.

  In the data area, a spare area 1, a spare area 2, a secondary TDMA, and a user data area are provided.

  In the lead-out area, the defect management areas DMA3 and DMA4 are provided.

  Normally, a rewritable medium has only a defect management area (DMA) and no TDMA is provided. In the case of a write-once medium, a TDMA is separately allocated in consideration of the characteristics of the medium.

  More specifically, because of the characteristics of the write-once medium, the data cannot be recorded again at the position where the data has already been recorded. Therefore, when the defect information newly generated during data recording is updated, the drive is recorded recently. After reading the defect information, the newly updated defect information is added and recorded in a new cluster. Therefore, as data is recorded on the write-once medium, the amount of defect information continues to accumulate and increases further.

  Conventionally, a DMA provided for a rewritable medium has a problem in that it has a small data capacity and is used for an area for defect management of a write-once medium. Therefore, TDMA having a data capacity larger than DMA is separately allocated to the write-once medium.

  Then, when the write-once medium is finalized, finally valid TDMS recorded in TDMA is recorded in DMA. When the write-once medium is finalized, the final effective TDMS recorded in the TDMA is copied to the DMA, so that the write-once medium can be used by using the rewritable medium drive. Reduce the time taken for the initialization process.

  The medium initialization process is an operation for reading information recorded in the lead-in area or the lead-out area and grasping how the medium should be managed and how data should be recorded / reproduced. Say. Therefore, the larger the amount of information recorded in the lead-in area or the lead-out area, the longer the time required for the initialization process after loading the medium. Searching for information recorded in DMA is much faster than searching for defect information recorded in TDMA with a large data capacity.

  Referring to FIG. 1, in the present embodiment, TDMA includes two regions, Primary TDMA and Secondary TDMA. Primary TDMA and Secondary TDMA are areas in which TDMS is recorded. As described above, TDMS is a concept including TDFL and TDDS. The TDFL is information notifying the position where the defect has occurred and the position of the newly replaced spare area, and the TDDS is information notifying the position where the TDFL is recorded.

  In addition to the TDDS and the TDFL, the TDMS may include a space bit map (SBM) that indicates whether or not data is recorded in each cluster constituting the entire recording area of the write-once medium. The SBM may be recorded separately in a cluster, or may be recorded in one cluster along with other TDMSs.

  The Secondary TDMA provided in the data area may or may not be assigned at the decision of the user or drive manufacturer. The reason why the assignment of the Secondary TDMA area is left to the decision of the user or drive producer is to allow the user or drive producer to use the write-once medium more flexibly.

  Spare Area 1 and Spare Area 2 assigned to the data area are assigned in the initialization process of the write-once medium when performing defect management by the drive.

  FIG. 2 is a diagram illustrating an example of information recorded in the TDMA illustrated in FIG. Referring to FIG. 2, each TDDS and TDFL are recorded in one cluster.

  In TDMA, information to be updated in at least one cluster is recorded in the order in which the information to be updated is generated, without dividing a region for recording TDDS and TDFL.

  FIG. 3 is a diagram illustrating an example of the data structure of the TDDS illustrated in FIG.

  In TDDS # i (i is an integer of 0 or more), recordable position information of the recording condition Test area, position information of TDFL # i corresponding to TDDS # i, Write Protection information, and how many times TDDS has been updated. UpdateCount indicating whether or not, the size information of Spare Area1 and Spare Area2 allocated to the data area, C_flag, and the like are recorded.

  Among the information recorded in the TDDS, C_flag is an abbreviation of “Consistency Flag” and corresponds to status information of the TDMS update cycle. C_flag will be described later.

  On the other hand, although not shown in a separate drawing, an inner area 0, a data area 0, and an outer area 0 are provided on the first recording layer in order from the inner circumference to the outer circumference, and the outer area is provided on the second recording layer. In the dual recording layer write once type disk in which the area 1, the data area 1, and the inner area 1 are provided in order from the inner circumference to the outer circumference, the same area as that provided in the single recording layer disk is the same as the first recording layer and the second recording layer. Provided on the recording layer.

  Similarly, in the case of a dual recording layer write-once disc, the above-described defect management according to the present invention can be applied, and the primary TDMA of the first recording layer is the primary TDMA of the second recording layer. It is preferably used after the recording has been completed, and the secondary TDMA of the second recording layer is also preferably used after both of the secondary TDMAs of the first recording layer have been recorded.

  FIG. 4 is a block diagram of an apparatus for performing defect management of a write-once medium according to the present invention. Referring to FIG. 4, the apparatus according to the present embodiment includes a recording / reproducing unit 1, a control unit 2, and a memory unit 3.

  The recording / reproducing unit 1 records data on the write-once medium 4 of the information recording medium according to the present embodiment under the control of the control unit 2, and reproduces the data in order to verify the recorded data.

  The controller 2 performs defect management using TDMA provided in the write-once medium 4 when recording data on the write-once medium 4, and the controller 2 performs defect management of the write-once medium 4 according to the present invention. Do.

  In the present embodiment, the control unit 2 records data on the write-once medium 4 in a predetermined unit, and then verifies the recorded data to search for a defective part by a “post-recording verification method”. The control unit 2 verifies the user data after recording it in a predetermined unit, and inspects where the defective area is generated. The control unit 2 generates TDFL and TDDS that indicate where the defect region that has become clear as a result of the inspection is located. The control unit 2 saves the generated TDFL and TDDS in the memory unit 3, collects a predetermined amount, and records it in the TDMA provided in the write-once medium 4.

  FIG. 5 is a block diagram of a drive in which an apparatus for performing defect management of the write-once medium according to the present invention shown in FIG. 4 is implemented. Referring to FIG. 5, the drive includes a pickup 10 as the recording / reproducing unit 1. The write-once medium 4 is attached to a pickup 10. The drive also includes a PC I / F 21, a DSP (digital signal processor) 22, an RF AMP 23, a servo 24, and a system controller 25 as the control unit 2. The memory unit 3 is provided in the system controller 25 of the control unit 2.

  At the time of recording, the PC I / F 21 receives a recording command together with data to be recorded from a host (not shown). The system controller 25 performs initialization necessary for recording. The DSP 22 performs ECC (error correction code) encoding on the data to be recorded received by the PC I / F 21 by adding additional data such as parity for error correction, and then the ECC encoded data is set in a predetermined format. Modulate with. The RF AMP 23 converts the data output from the DSP 22 into an RF signal. The pickup 10 records the RF signal output from the RF AMP 23 on the write-once medium 4. The servo 24 receives a command necessary for servo control from the system controller 25 and servo-controls the pickup 10. Further, the system controller 25 instructs to read data recorded by the pickup 10 or records predetermined information such as TDMS in order to perform defect management according to the present invention at the time of recording.

  Further, the system controller 25 records the TDMS finally recorded in the TDMA, that is, the TDDS and the TDFL, in the DMA when finalizing the write-once medium 4 by a user command or when a predetermined finalization condition is satisfied. To order.

At the time of reproduction, the PC I / F 21 receives a reproduction command from a host (not shown). The system controller 25 performs initialization necessary for reproduction. The pickup 10 irradiates the write-once medium 4 with a laser beam, and outputs an optical signal obtained by receiving the laser beam reflected from the write-once medium 4. The RF AMP 23 converts the optical signal output from the pickup 10 into an RF signal and provides modulated data obtained from the RF signal to the DSP 22, while receiving a servo signal for control obtained from the RF signal. Provided to the servo 24. The DSP 22 demodulates the modulated data and outputs data obtained through ECC error correction. On the other hand, the servo 24 receives the servo signal received from the RF AMP 23 and the command necessary for servo control received from the system controller 25 and performs servo control on the pickup 10. PC I / F 21 is a DSP
The data received from 22 is sent to the host. Further, the system controller 25 can instruct the pickup 10 to read information necessary for defect management during reproduction. That is, the system controller 25 manages the entire system during recording / reproduction.

  The write-once medium defect management method according to the present invention will be described based on the above configuration.

  The present invention provides a TDMS update cycle and a TDMS update so that it can be easily understood whether or not defect management by the drive is terminated abnormally due to an unforeseen abnormal situation during data recording on the information recording medium. The concept of Consistency Flag (hereinafter referred to as C_flag), which is information representing the state of the cycle, is introduced.

  FIG. 6 is a state diagram for defect management of a write-once medium according to the present invention. TDMS has two major states. One is a TDMS update cycle open state in which C_flag has a value of “1”, and the other is a TDMS update cycle close state in which C_flag has a value of “0”. By recording the corresponding C_flag information according to the TDMS update state, when the write-once medium is loaded into the drive, if the value of C_flag, which is the TDMS update state information, is “1”, the drive is loaded into the write-once type. It can be seen that an abnormal situation such as power-down occurs during the previous use of the medium, and defect management is not performed correctly.

  With reference to FIGS. 4 and 6, the write-once medium defect management method according to the present invention will be described in detail. If the write-once medium 4 is loaded into the drive (operation 10), the TDMS update cycle becomes state 100. In the state 100, the state of the write-once medium 4 is determined to be included in the TDMS if no data is recorded at all, or if already recorded data exists and defect management is performed normally. The value of the recorded C_flag is “0” in the TDMS update cycle closed state.

  If the write-once medium has no recorded data, the control unit 2 sets the C_flag value “0” to the first value of the primary TDMA together with information indicating that defect management is performed by the drive when the write-once medium is initialized. Record in the cluster. With reference to FIGS. 2 and 3, C_flag is included in TDDS and recorded as described above.

  According to this embodiment, a TDMS update cycle is opened by a host command or a recording or playback operation (operation 20), and a TDDS including a C_flag value “1” is recorded so as to indicate a TDMS update cycle open state. The TDMS update cycle then goes to state 110.

  Two cases in which the TDMS update cycle is opened will be described in more detail.

Case 1: When a TDMS update cycle is opened by a host command Final TDMS, specifically, a write-once medium 4 in which the value of C_flag included in the finally recorded TDDS is “0” Is loaded, the control unit 2 receives a command to open a TDMS update cycle from a host (not shown). The control unit 2 that has received the TDMS update cycle open command records the TDDS including the value “1” of the C_flag so as to indicate the TDMS update cycle open state at the next position of the TDMS finally recorded in the TDMA. The recording / reproducing unit 1 is controlled. Since only the value of C_flag changes and other information such as TDFL does not change, only the TDDS including the changed value of C_flag is recorded in the new cluster.

Case 2: When a TDMS update cycle is opened by a recording or reproduction operation. A write-once medium 4 whose C_flag value included in a finally recorded TDDS is “0” is loaded, and data recording or reproduction preparation is performed. When finished, the host issues a data recording or playback command, and the drive issues a data recording or playback command. If the TDMS update is requested during data recording or reproduction, the control unit 2 sets the value “C_flag” to indicate the TDMS update cycle open state at the next position of the TDMS finally recorded in the TDMA. The recording / reproducing unit 1 is controlled to record the TDDS including “1”.

  The TDMS is updated after one or more “verify-after-write” or after a certain amount of data is recorded. At the time of updating the TDMS, the C_flag value “1” is included in the TDDS and updated.

  Even when data recorded on the write-once medium 4 is reproduced, if it is determined that a defect exists in the specific cluster, defect management for updating the TDMS is similarly performed.

  After the state 110 in which the value of C_flag is recorded as “1” and the TDMS update cycle is opened, a new TDMS is generated and stored in the memory 3 by proceeding with data recording or reproduction (operation 30). . For efficient use of TDMA, the control unit 2 preferably records and updates the TDMS in the TDMA only by a TDMS update command (operation 50) from the host. At the time of updating the TDMS, the C_flag value “1” is included in the TDDS and updated.

  The state 120 is a TDMS update cycle open state in which the value of the C_flag is “1”, and a state in which the TDMS can be updated by proceeding with data recording or reproduction (operation 30). In state 120, if there is a TDMS update command (operation 50) from the host, the control unit 2 updates the TDMS, and the TDMS update cycle is updated by including the C_flag value “1” in the TDDS when the TDMS is updated. State 110 is entered.

  After the TDMS update cycle is opened by a TDMS update cycle open command from the host or by a recording or reproduction operation, if an instruction to eject the write-once medium 4 or a command to close the TDMS update cycle is issued from the host ( Operation 40), the control unit 2 controls the recording / reproducing unit 1 so as to record the TDDS including the value “0” of C_flag indicating that the TDMS update cycle state is the closed state in the TDMA. By recording the TDDS including the C_flag value “0” in the TDMA, the TDMS update cycle becomes the closed state 130.

  When the host issues an instruction to close the TDMS update cycle that is not an eject instruction for the write-once medium 4, the state returns to the state 100 after the state 130 is reached. If the host issues an eject command for the write-once medium 4, the write-once medium 4 is ejected (operation 70).

  If the user issues a finalization command for the write-once medium 4 in the state 130, the control unit 2 performs recording / reproduction so that the remaining empty area of the TDMA is filled with predetermined data such as “ffh”. Control part 1 to prevent TDMA from recording any further TDMS, ie TDDS, TDFL or SBM.

  As described above, by recording the C_flag information indicating the two states of the TDMS update cycle, that is, the open state and the closed state, in the TDMS, an abnormal accident such as a power-down of the drive during the use of the write-once medium 4 can be prevented. It can be confirmed whether or not it has occurred. That is, if a drive power down occurs while the write-once medium 4 is used, the value of C_flag indicating that the TDMS update cycle is in the open state is finally recorded in the TDMA.

  On the other hand, in order to improve the data reliability of TDMS, it is desirable to duplicately record TDMS. For example, when updating the TDMS, the same TDMS is repeatedly recorded in a continuous cluster of TDMAs, or a new TDMS is recorded in the Primary TDMA, and a copy is recorded in the Secondary TDMA.

  The defect management method according to the present invention has been described above using the write-once medium as an example. However, the present invention for managing the defect of the information recording medium using the update cycle and the update cycle state information is not limited to use when updating the TDMS of the write-once medium.

  That is, when the drive records or reproduces data on the loaded information recording medium, the predetermined information generated in association with the data recording or reproduction is periodically or occasionally recorded on the information recording medium. When the predetermined information is not properly recorded on the information recording medium due to an unpredictable accident such as a power failure, and the information recording medium is loaded into the drive again. By referring to the final update cycle state information, the drive can easily know whether or not the predetermined information has been terminated abnormally without being recorded correctly when the information recording medium was used before. .

  FIG. 7 is a flowchart of an information recording medium defect management method according to the present invention. The defect management method for the information recording medium shown in FIG. 7 can be implemented by an apparatus as shown in FIGS. The defect management method for the information recording medium according to the present invention will be described with reference to FIGS.

  After the information recording medium is loaded (step 310), a predetermined information update cycle related to data recording or reproduction is started (step 320). The information recording medium according to the present embodiment is not only an optical recording medium such as a DVD but also various types of information recording media such as a hard disk.

  The predetermined information related to data recording or reproduction according to this embodiment is information generated during recording / reproduction of data on the information recording medium, and is recorded on the information recording medium for data reproduction later. Information that must be provided. Examples of the predetermined information related to data recording or reproduction include defect information in the data area. The defect information includes not only TDMS in the write-once medium as described above but also defect information recorded in the DMA area provided in the overwritable medium.

  The update cycle of the predetermined information may be started by an update cycle open command or a data recording or reproduction command issued by a host (not shown), but is not limited thereto.

  When the update cycle of the predetermined information is started, the control unit 2 controls the recording / reproducing unit 1 so as to record the update cycle open state information in a predetermined area provided in the information recording medium (step 330). . As in the case of the write-once medium described above, the update cycle state information indicates the update cycle open state when the consistency flag is set and the value of the consistency flag is “1”, and the value of the consistency flag is “0”. For example, the update cycle is closed.

  The control unit 2 controls the recording / reproducing unit 1 to record / reproduce data on / from the information recording medium (step 340).

  The control unit 2 generates the predetermined information that needs to be updated by recording / reproducing data on / from the information recording medium (step 350).

  The control unit 2 determines whether the update cycle of the predetermined information has ended (step 360). If the update cycle has not ended, the control unit 2 records the predetermined information generated in step 350 on the information recording medium, and updates the update cycle. Open state information is also recorded (step 330).

  On the other hand, when the update cycle is completed, the predetermined information generated in step 350 is recorded on the information recording medium, and update cycle close state information is further recorded (step 370).

  On the other hand, when the update cycle state information is recorded in step 330 or step 370, the update cycle state information may be included in the predetermined information and the predetermined information including the update cycle state information may be recorded on the information recording medium. desirable. When the information recording medium is loaded and the update cycle open state information is recorded for the first time, only the update cycle state information is recorded with the predetermined information changed from the closed state to the open state compared with the previously recorded predetermined information. It is desirable to do.

  As described above, the defect management method for an information recording medium according to the present invention is an information recording medium due to an unpredictable accident such as a decrease in power supplied to the drive in defect management of the information recording medium by the drive. If the operation such as data recording ends abnormally at this time, if the information recording medium is loaded into the drive again, an abnormal accident such as power down will occur when the information recording medium is used after driving. It provides the effect of making it easy to determine whether or not it has occurred.

  Although the present invention has been described with reference to one embodiment shown in the drawings, it is merely illustrative, and various modifications and equivalent other embodiments can be made by those skilled in the art. You will understand that there is. Therefore, the true technical protection scope of the present invention is determined by the technical idea of the claims.

It is a figure showing the data structure of the single recording layer write-once type medium by this invention. It is a figure showing an example of the information recorded on TDMA. It is a figure showing an example of the data structure of TDDS. It is a block diagram of an apparatus for performing defect management of a write-once medium according to the present invention. FIG. 5 is a block diagram of a drive in which an apparatus for performing defect management of a write-once medium according to the present invention illustrated in FIG. 4 is implemented. It is a state diagram for defect management of a write-once medium according to the present invention. 3 is a flowchart of a defect management method for an information recording medium according to the present invention.

Claims (11)

In a method for defect management of an information recording medium,
A device that includes a drive device and performs defect management of a write-once medium,
The information recording medium, the temporary defect management area of the information recording medium temporary defect management information (TDDS) including the location information of the temporary defect list including the location information of the defective block (TDFL), and the temporary defect list (TDFL) Recording in (TDMA) ;
Determining the update status of the temporary defect list by referring to the status information recorded in the temporary defect management information,
The temporary defect management information includes first state information indicating that the update of the temporary defect list is not completed, and a state indicating that the update of the temporary defect list is completed. 2 of the state information only including,
The temporary defect list and the temporary defect management information recorded in the temporary defect management area are recorded in a defect management area (DMA) arranged in the lead-in area of the information recording medium when the information recording medium is finalized. A method characterized by that. The temporary defect list (TDFL) is updated to manage defects when data is either recorded on the information recording medium or read from the information recording medium. the method of claim 1. A pickup unit for recording / reproducing data on / from an information recording medium;
The information recording medium, the temporary defect management area of the information recording medium temporary defect management information (TDDS) including the location information of the temporary defect list including the location information of the defective block (TDFL), and the temporary defect list (TDFL) A control unit for controlling the pickup unit so as to record in (TDMA) ,
The update status of the temporary defect list is determined by referring to the status information recorded in the temporary defect management information,
The temporary defect management information includes first state information indicating that the update of the temporary defect list is not completed, and a state indicating that the update of the temporary defect list is completed. 2 of the state information only including,
The temporary defect list and the temporary defect management information recorded in the temporary defect management area are recorded in a defect management area (DMA) arranged in the lead-in area of the information recording medium when the information recording medium is finalized. A drive device characterized by that.   The temporary defect list (TDFL) is updated to manage defects when data is either recorded on the information recording medium or read from the information recording medium. The drive device according to claim 3. In an information recording medium provided with a lead-in area, a user data area, and a lead-out area,
It said information recording medium, including a temporary defect management information including location information of the temporary defect list including the location information of the defective block (TDFL) and the temporary defect list (TDFL) (TDDS), temporary defect management structure (TDMS ) Has a temporary defect management area (TDMA) recorded therein ,
The indicates that the temporary defect management information is a state in which the first state information indicating that updating of the temporary defect list is in a state that has not been completed, and updating of the temporary defect list is completed It includes two status information,
When the information recording medium is played back by a device that includes a drive device and performs defect management of the write-once medium, the status of the temporary defect list update is referred to the status information recorded in the temporary defect management information It is determined by,
When the information recording medium is finalized by a device for performing defect management of the write-once medium, the temporary defect list and the temporary defect management information of the temporary defect management structure recorded in the temporary defect management area are: An information recording medium recorded on a defect management area (DMA) arranged in the lead-in area . In a method for determining whether or not defect management of an information recording medium is terminated abnormally due to an abnormal event,
A device that includes a drive device and performs defect management of a write-once medium,
The information recording medium, the temporary defect management area of the information recording medium temporary defect management information (TDDS) including the location information of the temporary defect list including the location information of the defective block (TDFL), and the temporary defect list (TDFL) Recording in (TDMA) ;
Determining the update status of the temporary defect list by referring to the status information recorded in the temporary defect management information,
The temporary defect management information includes first state information indicating that the update of the temporary defect list is not completed, and a state indicating that the update of the temporary defect list is completed. 2 of the state information only including,
The temporary defect list and the temporary defect management information recorded in the temporary defect management area are recorded in a defect management area (DMA) arranged in the lead-in area of the information recording medium when the information recording medium is finalized. A method characterized by that.   The method according to claim 6, wherein the reading of the state information is to read the state information recorded at the end of the temporary defect list (TDFL).   The temporary defect list (TDFL) is updated to manage defects when data is either recorded on the information recording medium or read from the information recording medium. The method according to claim 6. A pickup unit for recording / reproducing data on / from the loaded information recording medium;
Said information recording medium, a temporary defect list including the location information of the defective block (TDFL), and temporary defect management information (TDDS) is recorded temporary defect management area (TDMA including the location information of the temporary defect list (TDFL) And a control unit for controlling the pickup unit so as to reproduce the information on the information recording medium,
The update status of the temporary defect list is determined by referring to the status information recorded in the temporary defect management information,
The temporary defect management information includes first state information indicating that the update of the temporary defect list is not completed, and a state indicating that the update of the temporary defect list is completed. 2 of the state information only including,
The temporary defect list and the temporary defect management information recorded in the temporary defect management area are recorded in a defect management area (DMA) arranged in the lead-in area of the information recording medium when the information recording medium is finalized. A drive device characterized by that.   The drive device according to claim 9, wherein the control unit controls the pickup unit to read state information recorded at the end of the temporary defect list (TDFL).   The temporary defect list (TDFL) is updated to manage defects when data is recorded on the information recording medium or read from the recording medium, The drive device according to claim 9.

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