KR100900969B1 - Method for managing defect using temporary DFL and temporary DDS, and disc thereof - Google Patents

Abstract

Disclosed are a defect management method using a temporary defect information area and a temporary defect information management area, and a disc thereof.

The method for managing a defect of a disc according to the present invention includes (a) defect information on data recorded according to one recording operation in the data area and defect information on data recorded according to a recording operation previously performed in the data area. Recording in the first temporary defect information in the; And (c) recording the first temporary defect information and defect information on data recorded in the data area according to a next recording operation in the data area as second temporary defect information. This makes it possible to efficiently use a defect management area that is applicable to write once disks and has a limited recording capacity.

Description

Method for managing defect using temporary DFL and temporary DDS, and disc}

1 is a block diagram of a recording apparatus according to a preferred embodiment of the present invention;

2 is a structural diagram of a disk 100 according to a preferred embodiment of the present invention,

3 is an example of a data structure of the disk 100 of FIG.

4 is an example of a data structure of FIG. 3;

5 is a reference diagram for explaining in detail the process of recording the TDFL according to an embodiment of the present invention;

6 is a data structure diagram of a TDFL according to an embodiment of the present invention;

7 is a data structure diagram of information about defect #i and information about TDFL #i recorded in TDFL;

8 is a flowchart illustrating a defect management method according to an embodiment of the present invention;

9 is a flowchart illustrating a defect management method according to another embodiment of the present invention;

10 is a flowchart for explaining a defect management method according to another embodiment of the present invention.

The present invention relates to defect management of a disc, and more particularly, to a defect management method using the temporary defect information area and a temporary defect information management area, an apparatus thereof, and a disc thereof.

Defect management refers to a process of supplementing data loss due to defects by rewriting user data recorded in a portion where a defect occurs when a defect occurs in user data recorded in the user data area. Conventionally, defect management is largely divided into a defect management method using linear replacement and a defect management method using skipping replacement. Linear replacement means that when a defect occurs in the user data area, the defective area is replaced with an area where a defect in the spare area does not occur. Skipping refers to the use of areas skipped without using the defective areas, followed by areas that are not defective.

Both the linear replacement method and the skip method are applicable only to discs capable of repeatable recording such as DVD-RAM / RW and recording by the random access method. In other words, the conventional linear replacement method and the skip method are difficult to apply to a write once disc which can only be written once. This is because whether or not a defect has occurred is confirmed by actually recording data. However, in the case of write once disks, once data is written, it cannot be erased and written again, and thus defect management according to the conventional method is impossible.

On the other hand, high-density write once discs with recording capacities of several tens of GB are proposed following CD-R, DVD-R, and the like. Since these disks are relatively inexpensive and have random access when reading data, they can be used for backup because of their relatively high read speed. However, since defect management is not performed for the write once disk, if a defective area is generated during backup, the backup cannot be continued and is interrupted. Since backups occur, especially at times when the system is not used frequently, usually at night when there are no administrators, it is likely that backups will no longer be performed if a backup is interrupted due to a faulty zone.

It is therefore an object of the present invention to provide a defect management method, apparatus and disk which are applicable to a write once disk.

It is another object of the present invention to provide a defect management method, an apparatus and a disk thereof, in which a recording is smoothly performed by processing the defect even if a defect occurs during recording.

The above object is, according to the present invention, a method for managing a defect of a disc, comprising: (a) defect data for data recorded according to one recording operation in a data area and data recorded according to a recording operation previously performed; Recording defect information on the data area as first temporary defect information; And (c) recording the first temporary defect information and defect information on data recorded in the data area according to a next recording operation in the data area as second temporary defect information. It is achieved by the management method.
After the step (a), (b) the first temporary defect management information for managing the first temporary defect information is placed in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area, and an outer area. Recording as defect management information further;
After step (c), (d) second temporary defect management information for managing the second temporary defect information is stored in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area, and an outer area. Preferably, the method further includes recording into defect management information.
In addition, the above object is a method for managing a defect of a disc, comprising: (a) defect information on data recorded in a data area according to a first recording operation, and data recorded on the data area according to a second recording operation; Defect information,… Defect information on the data recorded in the data area according to the n-th recording operation, and defect information on the data recorded in the data area according to the n-th recording operation, are recorded as the n-th temporary defect information in the data area. Making; And (b) recording defect management information for managing the nth temporary defect information in the temporary defect management information area as the nth temporary defect management information (n = 1, 2). , 3, ...).
The defect management method includes (c) repeating steps (a) and (b) while increasing n by 1; And (d) recording the last defect information and the temporary defect information recorded at the time of finalizing in the defect management area.
Step (a) includes (a1) recording data in a predetermined unit; (a2) verifying the recorded data to find out where the defect occurred; (a3) storing information designating a defective area in a memory from a portion where a defect occurs to data recorded thereafter; (a4) recording data in a predetermined unit after the defect area; (a5) repeating steps (a2) to (a3) at least once; And (a6) if the end of the n-th recording operation is predicted, reading the information stored in the memory and recording the information stored in the n-th temporary defect information area provided in the data area.
The step (a) preferably includes (a7) further recording information specifying the nth temporary defect information area as a defect area in the nth temporary defect information area.
On the other hand, according to another field of the present invention, the above object is a recording unit for recording data on a disc; And recording information such that defect information on data recorded in accordance with a recording operation in the data area of the disc and defect information on data recorded in accordance with a recording operation previously performed, are recorded in the data area as first temporary defect information. And a control unit for controlling the recording unit to record the first temporary defect information and defect information on data recorded in the data area according to a next recording operation in the data area as second temporary defect information. It is also achieved by a device characterized in that.
The controller may record the defect management information for managing the first temporary defect information as first temporary defect management information in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area, and an outer area. Controlling a recording unit and recording defect management information for managing the second temporary defect information as second temporary defect management information in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area and an outer area. It is preferable to control the recording unit so that the recording unit is controlled.
In addition, the above object is a recording apparatus, comprising: a recording unit for recording data on a disc; And defect information on the data recorded in the data area according to the first recording operation, defect information on the data recorded in the data area according to the second recording operation; Defect information on the data recorded in the data area according to the n-th recording operation, and defect information on the data recorded in the data area according to the n-th recording operation, are recorded as the n-th temporary defect information in the data area. And a control unit for controlling the recording unit so as to control the recording unit and to record defect management information for managing the nth temporary defect information in the temporary defect management information area as the nth temporary defect management information. 1, 2, 3, ...).
The control unit preferably controls the recording unit to record the last defect information and the temporary defect information recorded at the time of finalizing in the defect management area.
The apparatus includes a reading unit which reads data recorded on the disc; And a memory unit, wherein the controller controls the recording unit to record data in a predetermined unit, and then reads and verifies the recorded data through the reading unit to find a portion where a defect occurs, and a portion where the defect occurs. Information stored in the memory area is stored in the memory area from the data to the data recorded thereafter, and when the end of the nth recording operation is predicted, the information stored in the memory area is read and the nth temporary defect information provided in the data area is stored. It is preferable to control the recording section to record in the area.
Preferably, the control unit controls the recording unit to further record information designating the nth temporary defect information area as a defect area in the nth temporary defect information area.
On the other hand, according to another field of the present invention, the above object is a single recording layer write once disc in which a lead-in area, a data area and a lead-out area are sequentially arranged, wherein the lead-in area and lead A defect management area provided in at least one of the out areas; A temporary defect information area provided in the data area in which temporary defect information is recorded; And a temporary defect management information area provided in at least one of the lead-in area and the lead-out area, in which temporary defect management information for recording the temporary defect information is recorded.
The temporary defect information area is preferably allocated for each recording operation.
The temporary defect information area accumulates information about a defect area generated in data recorded according to a previously performed recording operation together with information about a defect area generated in data recorded according to a corresponding recording operation. Preferably written as.
In the defect management area, it is preferable to record the temporary defect management information corresponding to the last recorded temporary defect information among the temporary defect information recorded so far at the time of finalizing.
Also, the above object is to provide a write once having a first recording layer in which the lead-in area, the data area and the outer area are sequentially arranged and a second recording layer in which the outer area, the data area and the lead-out area are sequentially arranged ( write once) A disk comprising: a defect management area provided in at least one of the lead-in area, lead-out area and outer area; A temporary defect information area provided in the data area in which temporary defect information is recorded; And a temporary defect management information area provided in at least one of the lead-in area, lead-out area and outer area.
The temporary defect information area is allocated for each recording operation, and the temporary defect information area is generated in data recorded according to a previously performed recording operation together with information about a defect area generated in data recorded according to a corresponding recording operation. The accumulated defect area information is accumulated and recorded as temporary defect information, and in the defect management area, temporary defect management information corresponding to the last recorded temporary defect information among the temporary defect information recorded so far at the time of finalizing is recorded. desirable.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

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1 is a block diagram of a recording apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 1, the recording apparatus includes a recording / reading section 1, a control section 2, and a memory section 3. The recording / reading section 1 records data on the disk 100, which is an information storage medium according to the present embodiment, and reads data to verify the recorded data. The control unit 2 performs defect management according to the present invention. That is, the control unit 2 conforms to the "verify after write method" in which the defect is found by recording the data in predetermined units and then verifying the recorded data. The control unit 2 records the user data in a predetermined recording unit and then records the information indicating the location of the defective area on the disk 100 as temporary defect information, and the management information for managing the temporary defect information as temporary defect management information. The disc 100 writes. The recording unit may be one recording operation. The recording operation is a unit of work determined by a user's intention, a recording operation to be performed, and the like. In this embodiment, the disc 100 is loaded into a recording device to perform recording of predetermined data, and then the disc 100 is ejected. Until point. The verification operation after recording during the recording operation is performed at least once, usually a plurality of times. When the user completes the recording of the predetermined data and then presses an eject button (not shown) provided in the recording apparatus to eject the disc 100, the control unit 2 predicts that one recording operation will end. When it is predicted that the recording operation will be completed, temporary defect information and temporary defect management information are generated and provided to the recording / reading section 1 to be recorded on the disc 100. The memory unit 3 is used to store temporary defect information obtained as a result of the verification operation performed by the control unit 2 after recording.

When data recording is completed on the disc 100, that is, when no further data is to be recorded on the disc 100 (when finalizing), the control unit 2 records the temporary defect information recorded on the disc 100. And the temporary defect management information are recorded in the defect management area provided in the disc 100.

2 shows the structure of a disk 100 according to a preferred embodiment of the present invention.

FIG. 2A shows a structure when the disc 100 is a single recording layer disc having one recording layer LO, and includes a lead-in area, a data area and a lead-out area. The lead-in area is located on the inner circumferential side of the disk 100 and the lead-out area is located on the outer circumferential side of the disk 100. The data area is located between the lead-in area and the lead-out area. The data area is divided into a user data area and a spare area. The user data area is an area in which user data is recorded. The spare area is an area for supplementing the loss of recording space due to a defect in the user data area. The spare area is preferably set so as to ensure the maximum data capacity that can be recorded while allowing a defect on the disk, so that approximately 5% of the total data capacity is usually set as the spare area. The spare area is preferably arranged at the last portion on the recording space of the disc. In the case of write once disk, the write characteristic of skip substitution is taken into consideration while recording data sequentially from the inner peripheral side to the outer peripheral side.

In this embodiment, the spare area exists only between the user data area and the lead-out area, but one or more spare areas may be disposed between the lead-in area and the lead-out area by utilizing a separate space obtained by dividing the user area as necessary. Can be.

FIG. 2B shows a structure in which the disk 100 is a dual recording layer disk having two recording layers L0 and L1. The recording layer L0 includes a lead-in area, a data area, and an outer area. An outer region, a data region, and a lead-out area are sequentially arranged from the outer circumferential side to the inner circumferential side of the disc 100 in the recording layer L1. Unlike the single recording layer disc of FIG. 2A, the lead-out area is also arranged on the inner circumferential side of the disc 100. As shown in FIG. That is, the recording path for recording data is an OTP (Opposite Track Path) from the lead-in area of the recording layer L0 to the area outside of the recording layer L0, and then from the area outside of the recording layer L1 to the lead-out area of the recording layer L1. to be.

3 is an example of a data structure of the disk 100 of FIG. 2.

Referring to FIG. 3, a defect management area is provided in at least one of the lead-in area, the lead-out area, and the outer area, and a temporary defect management area is provided in at least one of the lead-in area and the lead-out area. In the data area, a temporary defect information area is disposed for each predetermined recording unit.

In general, the defect management area records information that affects the entire disk, such as the structure of the disk for managing defects, the location of defect information, whether or not the defect is managed, the location and size of the spare area. In the case of a write once disc, when a corresponding information is changed, a method of recording the changed information is newly applied after the previously recorded information. In general, when a disc is mounted in the apparatus, the recording or reproducing apparatus reads information in the lead-in area and the lead-out area to figure out how to manage the disc and how to record or play it. The larger the information in the lead-in area, the longer the time taken to prepare for recording or playback after the disc is loaded. Therefore, in the present invention, after introducing the concept of the temporary defect management information and the temporary defect information, only the temporary defect management information which is relatively more important information is recorded in the lead-in area, and the temporary defect information is recorded in the data area. At this time, the temporary defect information is preferably cumulatively recorded to include all previous temporary defect information. Therefore, the recording or reproducing apparatus can determine the defect situation of the entire disc by reading the last recorded temporary defect information. Thus, information for determining the position of the last recorded temporary defect information is recorded in the temporary defect management information area in which the temporary defect management information is recorded.

In the temporary defect information area # 0, information about a defect that occurred in the recording unit # 0 is recorded, and in the temporary defect information area # 1, information about a defect that has occurred in the recording unit # 1 is recorded. In the temporary defect management information area, defect management information for managing the temporary defect information areas # 0, # 1, ... is recorded. If data can no longer be written to the data area or if you no longer want to write data to the data area, that is, when finalizing, the defect information that was recorded in the temporary defect information area and the temporary defect management information area will be deleted. The defect management information that has been recorded is finally recorded in the defect management area.                     

The reason for recording the temporary defect management information and the temporary defect information again in the defect management area is as follows. When data is no longer needed to be written to disk (finalizing), the temporary defect management information updated and recorded several times and the temporary defect information located in the data area are moved to the defect management area of the lead-in area. This is because the recording or reproducing apparatus has an advantage that the information recorded on the disc can be read more quickly in the future, and the reliability of the information can be improved by recording the defect management information in a plurality of places.

In this embodiment, defect information recorded in the previous temporary defect information areas # 0, # 1, # 2, ..., # i-1 is accumulated and recorded in any temporary defect information area #i. Therefore, when finalizing, it is sufficient to read only the defect information recorded in the last temporary defect information area and write it back to the defect management area.

4 is an example of the data structure of FIG. 3.

Referring to FIG. 4, a defect management area (DMA), which is a defect management area, is provided in at least one of a lead-in area, a lead-out area, and an outer area. More specifically, in the case of a single recording layer disc as shown in Fig. 2A, the DMA is provided in at least one of the lead-in area and the lead-out area. In the case of a dual recording layer disc as shown in Fig. 2B, the DMA is provided in at least one of the lead-in area, the lead-out area, and the outer area. In the present embodiment, in the case of a single recording layer disc, the DMA is arranged in both the lead-in area and the lead-out area, and in the case of a double recording layer disc, it is arranged in all of the lead-in area, the lead-out area and the outer area.                     

User data according to recording operation # 0 is recorded in the data area, and then TDFL (Temporary DeFect List) # 0, which is a temporary defect information area corresponding to recording operation # 0, is disposed. In TDFL # 0, information about a defect that has occurred in user data recorded in accordance with recording operation # 0 is recorded. The TDFL # 1 corresponding to the recording operation # 1 is disposed after the user data according to the recording operation # 1 is recorded, and the TDFL # 2 corresponding to the recording operation # 2 is also arranged in the same order.

In the temporary defect management information area, temporary defect management information TDDS (Temporary Disc Definition Structure) # 0, # 1, # 2, ... which is management information for managing TDFL # 0, # 1, # 2, ... is recorded. TDDS # 0, # 1, # 2, ... correspond to TDFL # 0, # 1, # 2, ..., respectively. TDDS #i can record defect management status, spare area size, and other information necessary to manage TDFL #i, and TDFL #i can record the location information of the defective area and the location information of the replaced part. Can be.

TDDS #i should be allocated approximately 1 cluster for disks capable of high density recording of several tens of gigabytes, and 4-8 clusters for TDFL #i. This is because if the defect management information TDDS #i is only a few KBytes, but the minimum physical recording unit of the disk is a cluster, it is preferable to record in cluster units in order to record new information for updating. On the other hand, the total amount of defects allowed for the disk is preferably about 5 percent of the disk recording capacity. In this case, considering that about 8 bytes of information are needed to record information about one defect, and considering that the cluster size is 64 Kbytes, the TDFL #i is approximately 4-8 clusters.

Meanwhile, post-recording verification may also be performed for TDDS #i and TDFL #i, respectively. If a defect occurs, write back to the next adjacent area.

5 is a reference diagram for explaining in detail the process of recording the TDFL according to an embodiment of the present invention.

The unit for processing data may be divided into sectors and clusters. A sector is a minimal unit that can manage data in a computer's file system or application program. A cluster is a minimum unit that can be physically recorded on a disk at one time. Typically, one or more sectors make up a cluster.

Sectors are divided into physical sectors and logical sectors. The physical sector means space for recording one sector of data on the disk. An address for finding a physical sector is called a physical sector number (PSN). A logical sector refers to a sector unit for managing data in a file system or an application program. Similarly, a logical sector number (LSN) is given. A device for recording and reproducing data on a disc finds a location on the disc of a data to be recorded using a physical sector number. A computer or application for recording data manages the entire data in logical sector units. The position of is managed by the logical sector number. The relationship between the logical sector number and the physical sector number is converted by the controller of the recording or reproducing apparatus by using a defect status and a recording start position.

Referring to FIG. 5, A means a data area. In the data area, there are a plurality of physical sectors (not shown) to which physical sector numbers are sequentially assigned. The logical sector number is given in at least one physical sector unit. However, since the logical sector numbers are sequentially assigned except for the defective area in which the defect has occurred, even if the physical sector and the logical sector are assumed to have the same size, when the defective area occurs, the physical sector number and the logical sector number do not coincide.

① to ⑨ refer to the unit where the verification operation is performed after recording. The recording device records the user data by the interval ① and then returns to the beginning of the interval ① to check whether the data is properly recorded or whether a defect has occurred. If a part where a defect has been found is found, all of the part and the data recorded thereafter are designated as the defect area. Thus, defect # 0, which is a defect area, is designated. Next, record the user data for the interval ② and then return to the beginning of the interval ② again to check whether the data is properly recorded or whether a defect has occurred. Thus, defect # 1, which is a defect area, is designated. Similarly, defect # 3 which is a defect area is specified. In section ④, no part where a defect occurred is found and there is no defect area.

Since the disk 100 according to the present embodiment is a write once disk, it is preferable not to use data recorded after the defective portion, so that all the areas where data after the defective portion are recorded are defective regions. It is incorporated. Because if the logical sector number LSN (Logical Sector Number) i is assigned to use the remaining data except for the defective part of the data recorded after the defective part, the defective part is subsequently identified. The logical sector number given here after recording must be given an LSN i-1 preceding the logical sector number assigned to the remaining data so that data can be reproduced in order during reproduction. However, logical sector management is not easy when a logical sector number is not sequentially assigned and a section in which the order is reversed is not easy. Therefore, in this embodiment, all areas in which data after the defective portion is recorded are incorporated into the defective area. The efficiency of logical sector management has been improved.

TDFL # 0 is recorded if the end of recording operation # 0 is predicted (after the user presses the eject button or completes the recording of the user data assigned to the recording operation). In the TDFL # 0, information relating to the defective areas # 1, # 2, and # 3 generated in the sections 1 to 4 is recorded. Similarly, TDFL # 1 is recorded to correspond to recording operation # 1. In TDFL # 0, information regarding a portion in which a defect is generated and designated as the defect area is recorded in the area in which user data according to recording operation # 0 is recorded. In the TDFL # 1, information regarding a portion in which a defect occurs in the area where user data according to the recording operation # 1 is recorded and designated as the defect area is recorded, as well as information recorded in the TDFL # 0.

6 is a data structure diagram of a TDFL according to a preferred embodiment of the present invention.

Referring to FIG. 6, information about defect # 1, information about defect # 2, and information about defect # 3 are recorded in TDFL # 0. The information on defect # 1 refers to information indicating where the defect # 1 is located. Information about defect # 2 is information indicating where the defect # 2 is located, information about defect # 3 is information indicating where the defect # 3 is located.

Further, information about TDFL # 0 is further recorded in TDFL # 0. Information about TDFL # 0 indicates where TDFL # 0 is recorded. Since no user data is recorded in the TDFL # 0, data recorded in the TDFL # 0 need not be read in the process of reproducing the user data. That is, from the viewpoint of user data reproduction, the defective area #i and the TDFL # 0 are the same in that the user data is not recorded, so the defective area #i and the TDFL # 0 have no meaning. Therefore, TDFL # 0 records its own recording position information, that is, information about TDFL # 0, and is used as useful information for indicating that user data is not recorded, for example, during playback.

In addition to the information recorded in TDFL # 0, information on defect # 4 and information on defect # 5 are recorded in TDFL # 1. Furthermore, similarly to the case of TDFL # 0, information about TDFL # 1 indicating the position where TDFL # 1 is recorded is further recorded. The reason is the same as in the case of TDFL # 0.

7 shows a data structure of information about defect #i and information about TDFL #i recorded in the TDFL.

Referring to Fig. 7, the information on defect #i includes status information, start position, hold and end position. The status information refers to flag information indicating whether the corresponding area is a defect area in which an actual defect has occurred or a TDFL in which temporary defect information is recorded, and in this case, flag information indicating that a defect area in which an actual defect has occurred is recorded. The start position is where the region started, that is, where defect #i started. The end position indicates where the defect #i ends. A hold is an area reserved for recording other information. Information regarding TDFL #i likewise includes status information, start position, hold and end position. The status information refers to flag information indicating whether the area is a defect area where an actual defect has occurred or an area TDFL in which temporary defect information is recorded. In this case, temporary defect information is recorded, not an area where an actual defect has occurred. Flag information indicating that the area is TDFL is recorded.

Referring to the defect management method according to the present invention based on the above configuration as follows.

8 is a flowchart illustrating a defect management method according to an embodiment of the present invention.

Referring to Fig. 8, the recording apparatus records defect information on data recorded according to the first recording operation as first temporary defect information in the data area, in order to manage the defect of the disc (step 801), and the first temporary information. Defect information and defect information on data recorded according to the second recording operation are recorded in the data area as second temporary defect information (step 802). Further, defect management information for managing the first temporary defect information area and the second temporary defect information area, respectively, is recorded in the temporary defect management information area (step 803).
However, in the present embodiment, a case in which two pieces of temporary defect information and temporary defect management information are recorded is simplified in consideration of the convenience of explanation, but the number thereof may be increased to some extent, and if the number is increased, the temporary The defect information includes all previous temporary defect information, that is, the temporary defect information is recorded cumulatively.
On the other hand, the last recorded temporary defect information and the temporary defect management information may be recorded in the defect management area during finalizing or may be left as it is. When left untouched, the disk drive accesses the temporary defect management information area to read the last recorded temporary defect management information, and accesses the data area to read the last recorded temporary defect information, where is the area where the defect exists? It can be seen.
9 is a flowchart illustrating a defect management method according to another embodiment of the present invention.

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Referring to FIG. 9, in order to manage a defect of a disc, the recording apparatus records defect information on data recorded according to a first recording operation in the data area as first temporary defect information (step 901). The defect management information for managing the temporary defect information is recorded as the first temporary defect management information in the temporary defect management information area provided in at least one of the lead-in area and the lead-out area (step 902). Further, the first temporary defect information and the defect information on the data recorded according to the second recording operation are recorded in the data area as the second temporary defect information (step 903), and then management information for managing the second temporary defect information. Is recorded as the second temporary defect management information in the temporary defect management information area (step 904). Until the finalizing is performed (step 805), the operations added to the recording operation, the temporary defect information, and the temporary defect management information are incremented by one, and the steps 901 to 904 are repeated (step 906). However, as the temporary defect information, previously recorded temporary defect information is cumulatively recorded. When finalizing is performed, the temporary defect management information recorded up to step 905, the temporary defect management information recorded last of the temporary defect information, and the temporary defect information are recorded in the defect management area (step 907). That is, the last temporary defect management information and the last temporary defect information are recorded in the defect management area as the last defect management information and the last defect information, respectively. At this time, the last defect information and the last defect management information may be repeatedly recorded. This is to improve the reliability of data detection. In addition, the final defect information and the final defect management information are also recorded and verified, and when a defect is generated, all the data recorded after the defect is generated after the defect is ignored (all designated as the defect area), and the defect area. It is also possible to record the remaining final defect information and the final defect management information after the designation.

10 is a flowchart for explaining a defect management method according to another exemplary embodiment.

Referring to FIG. 10, the recording apparatus records user data in the data area in units of verification after recording (step 1001). Next, the data recorded in step 1001 is verified to find a portion where a defect occurs (step 1002). The control unit 2 generates information designating the defect area from the portion where the defect occurs to the data recorded thereafter and stores it in the memory unit 3 as first temporary defect information (step 1003). Steps 1001 to 1004 are repeated until the end of the recording operation is predicted (step 1005).

If the recording of the user data according to the user input or the recording operation is completed and the end of the recording operation is predicted (step 1005), the control unit 2 of the recording apparatus reads the first temporary defect information stored in the memory unit 3 to read the data area. The data is recorded in the first temporary defect information area TDFL # 0 assigned to step S100 (step 1006). At this time, information specifying the first temporary defect information area TDFL # 0 as the defect area is further recorded in the first temporary defect information area TDFL #i (step 1007). In addition, the first temporary defect management information TDDS # 0 is recorded in the temporary defect management information area as management information for managing the first temporary defect information area TDFL # 0 (step 1008). Steps 1001 to 1008 are repeated until finalizing is performed (step 1009). However, each time the steps 1001 to 1008 are repeated, the ordinal number added to the temporary defect information, the temporary defect information area, and the temporary defect management information is increased by one (step 1010). In addition, as the temporary defect information, temporary defect information that has been previously recorded is cumulatively recorded. When finalizing is performed (step 1009), the last recorded temporary defect information TDFL #i and temporary defect management information TDDS #i are recorded in the defect management area DMA. Record as (step 1010). The last defect information DFL and the last defect management information DDS can be repeatedly recorded a plurality of times in recording in the DMA. This is to improve the reliability of data detection. Similarly, the final defect information and the final defect management information are recorded and verified, and if a defect occurs, all data recorded after the defect is generated after the defect is ignored (all designated as defect areas), and the defect area. It is also possible to record the remaining final defect information and the final defect management information after the designation.

As described above, the present invention provides a defect management method applicable to a write once disc. By placing the temporary defect information area in the data area, defect information can be accumulated cumulatively without limiting the recording capacity.In the finalizing, only the temporary defect information recorded in the last temporary defect information area is read and recorded in the defect management area. This makes it possible to efficiently use a defect management area with a limited recording capacity. Accordingly, even in the case of write once disk, defect management is performed while recording user data, thereby enabling a more stable backup operation without interruption of work.

Claims (24)

In the method of managing a disk defect, (a) recording defect information on data recorded according to the N-th recording operation in the data area and defect information on data recorded according to a recording operation previously performed as first temporary defect information of the defect information area; (c) recording the first temporary defect information and defect information on data recorded in the data area according to a next recording operation as second temporary defect information of the defect information area; And and (d) recording the second temporary defect information in a defect management area of the disc in response to a disc finalization command. The method of claim 1, After step (a) (b) recording defect management information for managing the first temporary defect information as first temporary disc definition information in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area, and an outer area; More, After step (c) (d) recording the defect management information for managing the second temporary defect information as second temporary disc definition information in a temporary defect management information area provided in at least one of a lead-in area, a lead-out area, and an outer area; The defect management method further comprising. In the method for managing a defect of a disk including a data area and a temporary defect management information area, (a) Defect information for data recorded in the data area in accordance with a first recording operation and defect information for data recorded in the data area in accordance with a second recording operation as control temporal defect information in a control operation. Information and… The defect information on the data recorded in the data area according to the n-th recording operation and the defect information on the data recorded in the data area according to the n-th recording operation in the data area. Recording with; And (b) recording defect management information for managing the nth temporary defect information in the temporary defect management information area as the nth temporary disk definition information (n = 1, 2, 3,…). The method of claim 3, (c) repeating steps (a) and (b) while increasing n by 1; And and (d) recording the last recorded temporary defect information and the last recorded temporary disk definition information in the defect management area during finalizing. The method of claim 3, An area in which the temporary disc definition information is recorded is a temporary defect management information area provided in at least one of a lead-in area and a lead-out area of the disc, or is selected from among a lead-in area, a lead-out area, and an outer area of the disc. And a temporary defect management information area provided in at least one. The method of claim 3, Step (a) is (a1) recording data in a predetermined unit; (a2) verifying the recorded data to find out where the defect occurred; (a3) storing information designating a defective area in a memory from a portion where a defect occurs to data recorded thereafter; (a4) recording data in a predetermined unit after the defect area; (a5) repeating steps (a2) to (a3) at least once; And and (a6) if the end of the n-th recording operation is predicted, reading the information stored in the memory and recording the information stored in the n-th temporary defect information area provided in the data area. delete delete delete delete delete delete delete In a write once disc in which a lead-in area, a data area and a lead-out area are sequentially arranged, A defect management area provided in at least one of the lead-in area and the lead-out area; And  A temporary defect management information area provided in at least one of the lead-in area and the lead-out area, in which temporary disc definition information is recorded for managing temporary defect information including position information of the defect area detected in the data area; Disc comprising a. delete The method of claim 14, The temporary defect information includes information about a defect area generated in data recorded according to a recording operation previously performed together with information about a defect area generated in data recorded according to a corresponding recording operation. Disk characterized. The method of claim 14, And the temporary disk definition information corresponding to the last recorded temporary defect information among the temporary defect information recorded so far at the time of finalizing is recorded in the defect management area. On a write once disc having a first recording layer in which the lead-in area, the data area and the outer area are sequentially arranged, and a second recording layer in which the outer area, the data area and the lead-out area are sequentially arranged. In A defect management area provided in at least one of the lead-in area, lead-out area, and outer area; And A temporary defect provided in at least one of the lead-in area, the lead-out area, and the outer area, in which temporary disc definition information is recorded for managing temporary defect information including position information of the defect area detected in the data area; And a management information area. delete The method of claim 18, The temporary defect information includes information about a defect area generated in data recorded according to a recording operation previously performed together with information about a defect area generated in data recorded according to a corresponding recording operation. Disk characterized. The method of claim 18, And the temporary disk definition information corresponding to the last recorded temporary defect information among the temporary defect information recorded so far at the time of finalizing is recorded in the defect management area. delete delete delete

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