KR100739814B1 - Defect management method and computer readable medium storing a program for performing the method - Google Patents

Abstract

A computer readable recording medium on which an optical recording information storage medium, a defect management apparatus, a defect management method, and a program for carrying out the method are recorded in accordance with the present invention.

A defect management method for recording / reproducing data to / from an optical recording information storage medium according to the present invention includes a replacement block for replacing a defect block related to a defect occurring in a user data area on the medium, and a replacement block / DL area, and recording information on a defect including a continuous defect list entry corresponding to information on a defect generated at consecutive positions of the user data area in the SA / DL area do. According to the present invention, it is possible to efficiently manage a space in which a defect list for defect management is recorded in a disc for performing defect management.

Description

[0001] The present invention relates to a defect management method and a computer readable medium having recorded thereon a program for performing the method,

1 is a schematic block diagram of a configuration of a recording / reproducing apparatus according to the present invention,

2 is an example of a disk structure of a single recording layer disk according to the present invention,

3 is an example of a disk structure of a double recording layer disk according to the present invention,

4 is a data structure diagram of the SA / DL area according to the present invention,

5 is a detailed data structure of DL #i shown in FIG. 4,

FIG. 6 is a detailed data structure of the DL entry #i shown in FIG. 5,

7 is a reference diagram for explaining a continuous defect block according to the present invention,

8 is a reference diagram for explaining a continuous defect list entry according to the present invention,

FIG. 9 is a view showing an example of the replacement status information and the continuous defect information shown in FIG. 6;

10 is a reference diagram for explaining an alternate continuous defect block and a continuous defect block without replacement in accordance with the present invention;

11A is a data structure of DL #k in the state shown in FIG. 10,

11B is a data structure of DL #k further including the number information of consecutive defect list entries in the state shown in FIG. 10,

11C is a data structure diagram further including the number information of the consecutive defect list entries having the replacement status information "0" in the DL #k shown in FIG. 11B and the number information of the consecutive defect list entries having the replacement status information & ,

FIG. 12 is a flowchart illustrating a process of a disk defect management method according to the present invention. FIG.

More particularly, the present invention relates to an optical recording information storage medium, a defect management apparatus, a defect management method, and a computer readable recording medium on which a program for performing the method is recorded.

The defect management refers to a process of rewriting user data recorded in a portion where a defect occurs in a user data recorded in a user data area to compensate for data loss due to a defect occurrence. Conventionally, defect management is roughly divided into a defect management method using linear replacement and a defect management method using slipping replacement. In linear replacement, when a defect occurs in a user data area, the defective area is replaced with an area in which a defect in the spare area does not occur. Skip refers to sequentially using the area where the defect has not occurred and the area after the "skip" has not occurred.

In the case of linear replacement, a block in which a defect occurs in a user data area is referred to as a defect block, and a replacement block for replacement of such a defect block is recorded in a spare area provided in a predetermined portion of the disc. Information on such defect blocks and replacement blocks, that is, information for finding the positions of defect blocks and replacement blocks, is referred to as a defect list.

Generally, when a host reads certain data recorded on a disk, it instructs the drive to read the data with a logical address of the data. Then, the drive finds the physical address corresponding to the logical address and reads the recorded data corresponding to the physical address. If a defect block is generated at the physical address, the drive substitutes the defect block You need to find a replacement block. Therefore, the defect list includes a defect list entry containing information on the defect block, one for each defect block. That is, since one defect list entry is generated for each defect block, a recording space occupied by the defect list entry is also required to be so large that it can not be ignored.

Therefore, it is required to efficiently manage the space for the defect list. For this, it is required to manage the information about the defect blocks more efficiently for the defect blocks generated in the continuous position in the user data area.

The present invention relates to an optical recording information storage medium capable of efficiently managing a space required for a defect list for defect management on a disc, a defect management apparatus, a defect management method, and a computer readable recording medium storing a program for performing the method And a medium.

According to an aspect of the present invention, there is provided an optical recording information storage medium, including: a replacement block for replacing a defect block with respect to a defect occurring in a user data area; And the information on the defect includes a continuous defect list entry including information on a defect generated in successive positions of the user data area.

The continuous defect list entry preferably comprises a start entry corresponding to information on a first defect block among the defect blocks generated in the continuous position, and a last entry corresponding to information on the last defect block.

The start entry preferably includes position information of the first defect block and position information of a replacement block that replaces the first defect block.

In addition, the last entry preferably includes location information of the last defect block and location information of a replacement block that replaces the last defect block.

In addition, the information on the defects preferably includes information on the number of the consecutive defect list entries.

In addition, it is preferable that the information on the defect further includes information on the number of defect list entries.

Here, the number of single defect list entries is preferably calculated by the number of defect list entries - 2 X consecutive defect list entries.

It is preferable that the information on the defect includes a defect list entry made up of position information of the defect block, position information of the replacement block, and status information on the defect.

The status information preferably includes replacement status information indicating whether the defect block is replaced and continuous defect information indicating whether the defect block is a continuous defect block continuously generated.

Here, it is preferable that the information on the defect further includes information on the number of consecutive defect list entries having replacement status information indicating that the defect block has been replaced.

Here, it is preferable that the information on the defect further includes information on the number of consecutive defect list entries having replacement status information indicating that the defect block is not replaced.

According to another aspect of the present invention, there is provided a defect management apparatus for recording / reproducing data on / from an optical recording information storage medium, the defect management apparatus comprising: a replacement block for replacing a defect block relating to a defect occurring in the user data area, Wherein the information on the defect includes information on a defect including a consecutive defect list entry corresponding to information on a defect generated in consecutive positions of the user data area in the SA / And a control unit for controlling the recording in the DL area.

According to another aspect of the present invention, there is provided a defect management method for recording / reproducing data on / from an optical recording information storage medium, the defect management method comprising: a replacement block for replacing a defective block relating to a defect occurring in a user data area in the medium; Information on a defect including a consecutive defect list entry corresponding to information about a defect generated at a consecutive position of the user data area in the SA / DL area And recording.

According to still another aspect of the present invention, there is provided a computer readable recording medium on which a program for performing a defect management method for recording / reproducing data on an optical recording information storage medium is recorded, Allocating a replacement block for replacing a defect block with respect to a defect occurring in an area and an SA / DL area in which information on the defect is recorded; And recording information on a defect including the consecutive defect list entry in the SA / DL area.

The present invention will now be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a configuration of a recording / reproducing apparatus according to the present invention.

Referring to FIG. 1, the recording / reproducing apparatus includes a recording / reading unit 2 and a control unit 1.

The recording / reading unit 2 includes a pickup and the like to record data on the disk 4, which is an optical recording information storage medium according to the present invention, and reads the recorded data. The control unit 1 performs defect management according to the present invention. In the present embodiment, the control section 1 follows a " verify after write method " in which data is recorded in a predetermined unit and then the recorded data is verified to find a defect occurrence part. The control unit 1 records user data in units of one recording operation and then verifies and checks where the defective area occurs. The control unit 1 generates defect information indicating where the defective area is found as a result of inspection, stores the generated defect information in a memory, and collects a predetermined amount of the defect information to record it as a temporary defect information.

The recording operation is a unit of work determined by the user's intention and the recording operation to be performed. In this embodiment, the recording operation is performed after the disk is loaded in the recording apparatus and the predetermined data is recorded, and then the disk is taken out. During a single recording operation, the post-recording verification operation is performed at least once, usually a plurality of times. The temporary defect information obtained as a result of the post-recording verification operation is temporarily stored in the memory.

When the user presses an eject button (not shown) provided in the recording apparatus to eject the disc after completing the recording operation of the predetermined data, the control unit 1 predicts that one recording operation will be terminated. If it is predicted that the recording operation is to be terminated, the control unit 1 reads the temporary defect information stored in the memory, supplies it to the recording / reading unit 2, and instructs the recording /

The control unit 1 includes a system controller 10, a host I / F 20, a DSP 30, an RF AMP 40, and a servo 50.

At the time of recording, the host I / F 20 receives a predetermined write command from the host 3 and transmits it to the system controller 10. The system controller 10 controls the DSP 30 and the servo 50 to execute a write command received from the host I / The DSP 30 adds additional data such as parity for error correction to the data to be recorded received from the host I / F 20, and performs ECC encoding to generate an ECC block, which is an error correction block, Modulate. The RF AMP 40 converts the data output from the DSP 30 into an RF signal. The recording / reading unit 2 having the pickup records the RF signal transmitted from the RF AMP 40 to the disk 4. [ The servo 50 receives a command necessary for servo control from the system controller 10 and performs servo control of the pickup of the recording /

In particular, in accordance with the present invention, the system controller 10 includes a defect management unit 11 and a memory unit 12 for performing defect management according to the present invention. The defect management unit 11 reads and collects temporary defect information stored in the memory unit 12 to generate a defect list according to the present invention. That is, when there is information on the continuous defect blocks in the information on the read defect, the start entry corresponding to the information on the first defect block in the consecutive defect blocks and the last entry corresponding to the information on the last defect block Thereby generating a defect list entry. Thus, for example, even if eight defective blocks are consecutively generated in succession over eight blocks, an entry is generated one by one for each of the defective blocks so that a total of eight entries are generated, Only an entry is generated for the first block and the last block of the defect block generated by the defect block. Therefore, only two entries need to be generated. Therefore, it is possible to save the space required for the entry. Each DL entry includes DL defect information indicating whether the defect is a continuous defect or a single defect and alternate status information indicating whether there is a replacement block or not. Then, a DL including such DL entries is generated.

Upon playback, the host I / F 20 receives a playback command from the host 3. The system controller 10 performs initialization necessary for reproduction. The recording / reading section 2 irradiates the disk 4 with a laser beam and receives the laser beam reflected from the disk 4 to output the obtained optical signal. The RF AMP 40 converts the optical signal output from the write / read unit 2 into an RF signal, provides the modulated data obtained from the RF signal to the DSP 30, and outputs a servo signal for control obtained from the RF signal And provides it to the servo 50. The DSP 30 demodulates the modulated data and outputs data obtained through ECC error correction. On the other hand, the servo 50 receives a servo signal from the RF AMP 40 and a command necessary for servo control received from the system controller 10 to perform servo control on the pickup. The host I / F 20 sends the data received from the DSP 30 to the host. The system controller 10 controls the servo to read data from the position where data is recorded for playback control.

The structure of the optical recording information storage medium according to the present invention will now be described.

The disc management information (DMI) recorded on the optical recording information storage medium according to the present invention includes a Disc Definition Structure (DDS), a Recording Management Data (RMD), a Defect List : DL). A Disc Management Area (DMA) for recording disc management information includes a temporary disc management area (TDMA) for recording the disc management information during use of the disc and a finalized disc management area And a finalized disc management area (FDMA) for recording information.

The TDMA for temporarily recording the disc management information while using the disc includes a DDS / RMD area for recording the DDS and the RMD and a DL area for recording the DL.

The DDS includes a replacement block for replacing a defect block when a defect occurs in a data block recorded in the data area, position information of the SA / DL area in which the DL is recorded, position information of the DDS / RMD area, Position information usable for replacing in the DL area or for updating the DL, a consistency flag for checking whether the disc is normally ejected during use, recording prevention information for preventing recording, and the like.

The RMD is information for managing data recorded on a disc, and is used for R-zone entries indicating a status for each R-zone in a sequential recording mode and a random recording mode And a bitmap indicating whether or not data is recorded in each recording unit block in the user area as a bit value.

The DDS / RMD area for recording the DDS and the RMD is provided for a lead-in or lead-out in a single recording layer disc, and is provided for a lead-in or middle area or lead-out in the double recording layer. In addition, a DDS / RMD area may be allocated to a part of the data area in order to increase the update count of the DDS / RMD according to the intention of the drive manufacturer or the user at the initialization time for disk use.

If the user can not write data to the disk any more, or if the user wants to keep the current disk status without writing any additional data and only use it for playback only, the disk is finalized and the finalized disk management information And recorded in the final disc management area (FDMA).

The PCA area is an area prepared for testing with various recording powers according to a write strategy and for finding optimum recording power and variables according to the recording method.

      2 shows an example of a disk structure of a single recording layer disk according to the present invention.

Referring to FIG. 2, the disc has a lead-in area on the inner circumference in the radial direction of the disc, a lead-out area on the outer circumference, and a data area in the center.

The lead-in area includes PCA # 0, FDMA # 1, FDMA # 2 and DDS / RMD area # 0. The data area includes a user area, an SA / DL area # 0 and an SA / DL area # Out area includes PCA # 1, FDMA # 3, FDMA # 4, and DDS / RMD area # 1.

3 shows an example of a disk structure of a double recording layer disk according to the present invention.

3, a lead-in area, a data area # 0, and an intermediate area # 0 are provided in one recording layer L0, and an intermediate area # 1, a data area # 1, and a lead- .

The lead-in area of the L0 layer includes PCA # 0, FDMA # 2, DDS / RMD area # 0 and FDMA # 1, the data area includes SA / DL area # 0 and user area # 0, 0 includes FDMA # 3, DDS / RMD area # 2, FDMA # 4, and PCA # 1. The middle area # 1 of the L1 layer includes FDMA # 3, DDS / RMD area # 3, FDMA # 4 and PCA # 3. Data area # 1 includes SA / DL area # 1 and user area # The lead-out area includes PCA # 2, FDMA # 2, DDS / RMD area # 1, and FDMA # 1.

As shown in FIG. 2 and FIG. 3, when a defect occurs in the user area, a replacement block replacing a defect block related to the defect is recorded in the SA / DL area, and information on the defect is also recorded in the SA / . Herein, the information on the defect includes the position information of the defect block and the position information of the replacement block, and in particular, the information on the continuous defect according to the present invention.

4 is a data structure diagram of the SA / DL region according to the present invention.

4, the SA / DL area #i includes a DL # 0, a replacement block # 1, ..., a replacement block #k, a DL # 1, a replacement block # k + 1, ... DL #m .

DL # 0 is a defect list including information on a defect, and includes initialization information and the like.

Substitute blocks # 1 to #k are located to replace the defect blocks # 1 to #k with respect to the defect generated in the user area. Then, information on defects up to this point, that is, DL # 1, which is a defect list including information from defect blocks # 1 to #k, and replacement blocks # 1 to #k, is recorded. From the next position, the replacement block # k + 1 to the replacement block #m is substituted for the defective block # k + 1 to the defect block #m with respect to the defect generated in the user area.

As described above, the information on the defect according to the present invention, that is, the area in which the defect list is recorded is not located separately from the area for the replacement block that replaces the defect block, and is replaced with the defect list in one space called the SA / Blocks exist together.

5 is a detailed data structure diagram of DL # i shown in FIG.

5, the DL #i 200 includes a DL identifier 210, a DL update counter 220, a DL entry number 230, a DL entry # 1 240, and a DL entry # 2 250 do.

The DL identifier 210 is an identifier for indicating a defect list. That is, since the defect list and the replacement block are mixed in the SA / DL area according to the present invention, an identifier for indicating a defect list is required.

The DL update counter 220 is a value for indicating the number of times the defect list is updated.

The DL entry number 230 indicates the total number of entries included in the defect list.

The DL entry # 1 240 or the DL entry # 2 250 indicates an entry having defect information. The specific content of this DL entry is shown in Fig.

6 is a detailed data structure diagram of the DL entry #i shown in FIG.

Referring to FIG. 6, the DL entry #i 300 includes status information 310, defect block location information 320, and replacement block location information 330.

The status information 310 indicates status information on a defect indicated by the DL entry. The defect block position information 320 indicates position information of a defect block recorded in the user area, for example, a physical sector number of a defect block And the replacement block position information 330 indicates the positional information of the replacement block recorded in the SA / DL area, for example, the physical sector number of the replacement block.

The status information 310 includes 1-bit replacement status information 311 and 2-bit continuous defect information 312.

The replacement status information 311 indicates whether replacement has been performed with respect to a defect block generated in the user area. That is, whether a replacement block is located in the SA / DL area due to replacement of a defect block generated in the user area or whether there is no replacement block in the SA / DL area because a replacement block is not performed although a defect block has occurred.

The continuous defect information 312 indicates whether or not the DL entry is a consecutive DL entry indicating a continuous defect block and an entry indicating a continuous defect block (hereinafter, referred to as a continuous defect list entry) Indicates whether it is the first or the last.

Such a continuous defect block and continuous defect list entry will be described with reference to Figs. 7 and 8. Fig.

 Referring to FIG. 7, (1) to (7) indicate a unit in which a post-recording verification operation is performed, respectively. The recording apparatus records the user data as the interval 1 and then returns to the beginning of the interval 1 to check whether the data is correctly recorded or whether a defect occurs. If a defective part is found, the part is designated as a defective area. Thus, defect # 1, which is a defect region, is designated. Further, the recording apparatus rewrites the data recorded in the defect # 1 in the SA / DL area. The portion where the data recorded in the defect # 1 is rewritten is called the replacement # 1. Next, the recording apparatus writes the user data as much as the section # 2, and then returns to the beginning of the section " 2 " to check whether the data is correctly recorded or whether a defect occurs. If a defective part is found, the part is assigned to defect # 2. In a similar manner, replacement # 2 corresponding to defect # 2 is generated. In addition, defects # 3 and # 3 are generated in the section ③. In the section (4), no defective area is found because no defective area is found.

If the end of the recording operation # 0 is predicted (when the user presses the eject button or the recording of the user data assigned to the recording operation is completed), the recording apparatus records the defect # DL # 1 including information on # 1, # 2, and # 3 in the SA / DL area.

Recording operation # 1 starts and the recording apparatus writes the user data by the interval ⑤ and then returns to the beginning of the interval ⑤ to check whether the data is correctly recorded or whether a defect occurs. If a defective part is found, the part is designated as a defective area. Thus, defects # 4 and # 5, which are defective areas, are consecutively generated, and consecutive blocks are designated as defect blocks. Further, the recording apparatus rewrites the data recorded in the defects # 4 and # 5 in the SA / DL area. Next, the recording apparatus records the user data as the interval ⑥, and then returns to the beginning of the interval ⑥ to check whether the data is correctly recorded or whether a defect occurs. Defects # 6 and # 7, which are defective areas, are consecutively generated, and consecutive blocks are designated as defect blocks. Further, the recording apparatus rewrites the data recorded in the defects # 6 and # 7 in the SA / DL area. In the section ⑦, the defective area is not found because the defective area is not found. When the end of the recording operation # 1 is predicted, the recording apparatus records DL # 2 including information on the defects # 4 to # 7 in the SA / DL area.

Blocks related to defects occurring at consecutive positions of the user area, such as defects occurring in recording operation # 1, indicate continuous defect blocks. The first defect block of the consecutive defect blocks becomes the defect # 4 block, and the last defect block of the consecutive defect blocks becomes the defect # 7 block.

Thus, the replacement block replacing the consecutive defect blocks continuously generated at a predetermined position of the user area is recorded at successive positions of the SA / DL area. As shown, in the SA / DL area, a replacement # 4 block replacing the defect # 4 block is provided, and a replacement # 5 block replacing the defect # 5 block is provided at the next succeeding position, A replacement # 6 block replacing the defective # 6 block is provided, and a replacement # 7 block replacing the defective # 7 block is provided at the next succeeding position. The first replacement block among the replacement blocks replacing the continuous defect blocks becomes the replacement # 4 block, and the last replacement block among the replacement blocks replacing the continuous defect blocks becomes the replacement # 7 block.

In the case of the continuous defect blocks related to the defects generated in the continuous position in this way, the defect blocks included in the continuous defect blocks are all located at the consecutive positions, so that only the first block position and the last block position Knowing the position, the position of the remaining blocks included in the continuous defect block can be known from the position. Therefore, in the case of a continuous defect block, the present invention can save space necessary for recording information on a defect by including only information on a defect on a first defect block and a last defect block of a continuous defect block will be. The same applies to a replacement block that replaces a continuous defect block.

Thus, the continuous defect list entry indicating the information on the consecutive defect blocks as described above can be composed of a start entry and a final entry as shown in Fig.

Referring to FIG. 8, the continuous defect list entry consists of a start entry and a final entry. Both the start entry and the last entry have the structure of a DL entry as shown in FIG. 6, except that the start entry contains information on the first defect among the continuous defects, and the last entry contains information on the last defect among the continuous defects .

The start entry includes status information, first defect block position information indicating a position in which the first defect block of the consecutive defect blocks is recorded in the user area, and a first replacement block replacing the first defect block in the SA / DL area And the first replacement block location information indicating the recorded location. The last entry includes status information, last defect block position information indicating the position where the last defect block in the continuous defect block is recorded in the user area, and position where the last replacement block replacing the last defect block is recorded in the SA / Lt; RTI ID = 0.0 > replacement block location.

FIG. 9 shows an example of the replacement status information and the continuous defect information shown in FIG.

Referring to FIG. 9, bits indicating replacement status information are "0" and "1 ". If the replacement status information 311 is "1 ", it indicates that the defect block corresponding to the defect block position information 320 is displayed without replacement, and if the replacement status information 311 is" 0 & (320) is replaced with a replacement block corresponding to the replacement block position information (330).

The bits indicating the continuous defect information are "00 "," 01 ", and "10 ". If the continuous defect information 312 is "00 ", this DL entry represents a single defect list entry that is not a continuous defect. In this case, depending on the value set as the replacement status information, it may indicate a replacement defect block or a replacement defect block. In the case of a replacement defect block, the defect block location information and the replacement block location information are provided. In the case of a defect block without replacement, only the defect block location information is provided.

If the continuous defect information 312 is "01 ", this DL entry indicates the start entry of the continuous defect list entry. Therefore, as shown in FIG. 8, this DL entry has the first defect block position information of the consecutive defect blocks and the first replacement block position information of the consecutive replacement blocks.

If the continuous defect information 312 is "10 ", this DL entry indicates the last entry of the continuous defect list entry. Therefore, as shown in FIG. 8, the DL entry has the last defect block position information of the consecutive defect blocks and the last replacement block position information of the consecutive replacement blocks.

Now, three bits in which 1-bit replacement status information 311 and 2-bit continuous defect information 312 are combined will be described.

If the 3 bits of the 1-bit replacement status information 311 and 2-bit continuous defect information 312 are "000 ", this DL entry represents a single defect list entry for a single defect block, Represents a state having a replacement block. Therefore, this DL entry has defect block position information and replacement block position information.

If the combined 3 bits are "100 ", this DL entry represents a single defect list entry for a single defect block, and this single defect block represents a state having no replacement block. Therefore, this DL entry has defect block position information but does not have replacement block position information.

If the combined 3 bits are "001 ", this DL entry indicates the start entry of the consecutive defect list entry regarding the continuous defect block, and the defect block corresponding to this start entry, i.e., the first defect block of the continuous defect blocks, Respectively. Therefore, this DL entry has the position information of the first defect block in the consecutive defect blocks and the position information of the first replacement block among the consecutive replacement blocks replacing the consecutive defect blocks.

If the combined 3 bits are "010 ", this DL entry indicates the last entry of the consecutive defect list entry regarding the consecutive defect block, and the defect block corresponding to this last entry, i.e., the last defect block among the consecutive defect blocks, It shows the state of having. Therefore, this DL entry has the position information of the last defect block in the consecutive defect blocks, and the position information of the last replacement block among the consecutive replacement blocks that replace this continuous defect block.

If the combined 3 bits are "101 ", this DL entry indicates the start entry of the continuous defect list entry regarding the continuous defect block, and the defect block corresponding to this start entry, i.e., the first defect block of the continuous defect blocks, Is not present. Therefore, the DL entry has the position information of the first defect block in the consecutive defect blocks, but does not have the position information of the first replacement block among the consecutive replacement blocks replacing the consecutive defect blocks.

If the combined 3 bits are "110 ", this DL entry indicates the last entry of the consecutive defect list entry regarding the consecutive defect block, and the defect block corresponding to this last entry, that is, the last defect block among the consecutive defect blocks, Indicating a non-existent state. Therefore, this DL entry has the position information of the last defect block among the consecutive defect blocks, but does not have the position information of the last replacement block among the consecutive replacement blocks that replace this continuous defect block.

10 is a reference diagram for explaining continuous defect information according to the present invention.

Referring to FIG. 10, (a) shows a user area in which user data is recorded, and (b) shows an SA / DL area in which a replacement block and a defect list are recorded.

(a), a single defect block a has occurred as the first defect at the position "5" of the user area, and a continuous defect block b, Ⓒ, ⓓ, ⓔ occurred and continuous defect blocks ⓕ, ⓖ, ⓗ, ⓘ occurred as a third defect in continuous positions from position "17" to "20".

(b), a replacement block and a defect list for replacing a defect block generated in the user area are displayed in the SA / DL area.

A single replacement block ⓐ 'replacing the single defect block ⓐ is provided at the position 55' of the SA / DL region and a continuous replacement block ⓑ ', ⓒ', and '', which successively replace the continuous defect blocks b, c, Ⓓ ', and ⓔ' are provided from the position "56" to "59" of the SA / DL area, and the updated defect list DL # k is recorded after the third consecutive defect at the position "60". Continuous defect blocks ⓕ, ⓖ, ⓗ, ⓘ do not have replacement blocks. Information entered into the defect list DL #k in this state is shown in FIG. 11A.

11A is a data structure diagram of DL #k in the state shown in FIG.

11A, the DL #K 400 includes a DL identifier 410, a DL update counter 420, a number of DL entries 430, five DL entries, that is, a DL entry # 1 440, DL entry # 2 450, DL entry # 3 460, DL entry # 4 470, and DL entry # 5 480.

  As described above, the DL identifier 410 is an identifier indicating that the DL is a DL. The DL update counter 420 records "K" as the number of times the DL has been updated, and the number of DL entries 430 includes DL #K "5 ", which is the total number of included entries, is recorded.

DL entry # 1 440 is an entry related to the single defect block a shown in FIG. 8, in which "0" is substituted for the replacement status information, "00" is assigned as the continuous defect information, "5" Quot; 55 "is recorded as replacement block position information.

DL entry # 2 450 and DL entry # 3 460 constitute a continuous defect list entry.

DL entry # 2 450 is the start entry of the continuous defect list entry, and DL entry # 3 (460) is the last entry of the continuous defect list entry. That is, the DL entry # 2 450 is an entry related to the first defect block b < * > in the continuous defect blocks shown in Fig. 8, As the entry of the entry, "01" is recorded as continuous defect information, "9" is recorded as the location information of the defective block "b", and "56" is recorded as the location information of the replacement block b '.

DL entry # 3 460 is an entry related to the last defect block E in the continuous defect blocks shown in FIG. 8, and since the defect block E is replaced, "0" is recorded as replacement status information, Quot; 10 "is recorded as the continuous defect information," 12 "is recorded as the position information of the defect block e and" 59 "

DL entry # 4 470 and DL entry # 5 480 constitute a continuous defect list entry.

DL entry # 4 470 is the start entry of the continuous defect list entry, and DL entry # 5 (480) is the last entry of the continuous defect list entry. That is, the DL entry # 4 (470) is an entry related to the first defect block in the continuous defect blocks shown in FIG. 8, and since the defect block? Is not replaced, "1" Since this is the start entry of the continuous defect list entry, "01" is recorded as continuous defect information, "17" is recorded as the position information of the defect block ", and since this defect block is not replaced, "00" is recorded as the position information.

DL entry # 5 (480) is an entry related to the last defect block in the continuous defect blocks shown in FIG. 8, and since the replacement of the defect block is not performed, "1" Quot; 10 "is recorded as the continuous defect information and" 20 " is recorded as the position information of the defect block. Since this defect block is not replaced and no replacement block is present, "00" .

11B is a data structure diagram of DL #k further including the number information of consecutive defect list entries in the state shown in FIG.

The DL #k shown in FIG. 11B is the same as the DL #k shown in FIG. 11A, except that the number 490 of consecutive defect list entries is further added. Referring to FIG. 10, since there are two consecutive defect list entries, "2" is recorded as the number 490 of consecutive defect list entries.

As described above, the number of consecutive defect list entries in the defect list and the number of single defect list entries in the defect list can be known in advance without searching all the DL entries by setting the number of consecutive defect list entries. From the number of DL entries and the number of consecutive defect list entries, the number of single defect list entries can be calculated as follows.

The number of single defect list entries = the number of DL entries - 2 x (the number of consecutive defect list entries)

As described above, since the consecutive defect list entry is composed of a pair of the start entry and the last entry, the above equation is satisfied.

For example, in the case of DL #K shown in FIG. 11B, the number of single defect list entries can be calculated as = 5 - 2 x 2 = 1.

11C is a data structure diagram further including the number information of the consecutive defect list entries having the replacement status information "0 " in the DL #k shown in FIG. 11B and the number information of the consecutive defect list entries having the replacement status information" 1 " .

The DL #k shown in FIG. 11C is the same as the DL #k shown in FIG. 11B, except that the number information 500 of continuous defect list entries having replacement status information "0" and the replacement status information " Quot; 1 "of the number of consecutive defect list entries. Referring to FIG. 11A, since the continuous defect list entry having the replacement status information "0 " is one continuous defect list entry composed of the DL entry # 2 450 and the DL entry # 3 460, Quot; 1 " is recorded as the number 500 of consecutive defect list entries having " The continuous defect list entry having the replacement status information "1 " is one continuous defect list entry composed of the DL entry # 4 (470) and the DL entry # 5 (480) "1 " is recorded as the number 510 of entries.

12 is a flowchart for explaining a defect management method according to the present invention.

Referring to FIG. 12, the recording apparatus records user data in a data area in a unit where post-recording verification is performed (1201). Next, the data recorded in step 1201 is verified to find a defect occurrence part (1202). The control unit 1 designates the defective portion as a defective area, writes the data recorded in the defective area in the SA / DL area again to generate a replacement area, and then generates information on the defective block and the replacement block And stored in the memory (1203). Repeat steps 1201 to 1203 until the end of the recording operation is predicted.

When recording of the user data according to the user input or the recording operation is completed and the termination of the recording operation is predicted (1204), the control unit 1 of the recording apparatus reads information about the defect stored in the memory (1205).

When there is information on the continuous defect in the information on the read defect, a continuous defect list entry is formed which is composed of a start entry corresponding to the information on the first defect of the continuous defect and a last entry corresponding to the information on the last defect (1206) a DL entry is generated by including continuous defect information indicating whether a continuous defect or a single defect is present in each DL entry and replacement status information indicating whether there is a replacement block or not.

Then, the generated DL is recorded in the SA / DL area (1207).

The disk defect management method as described above can also be implemented as a computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording media in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission via the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional programs, codes, and code segments for implementing the disk defect management method can be easily deduced by the programmers of the present invention.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

As described above, according to the present invention, it is possible to efficiently manage a space in which a defect list for defect management is recorded in a disc performing defect management, and thus, it is possible to efficiently manage the disc space as a whole.

Claims (6)

A defect management method for recording / reproducing data on an optical recording information storage medium, Allocating a replacement block for replacing a defect block related to a defect occurring in the user data area and an SA / DL area for recording information about the defect on the medium; And recording information on a defect including a continuous defect list entry corresponding to information on a defect generated at successive positions of the user data area in the SA / DL area. The method according to claim 1, And constituting the continuous defect list entry as a start entry corresponding to the information on the first defect block among the defect blocks generated in the continuous position and a last entry corresponding to the information on the last defect block . 3. The method of claim 2, And generating the start entry including position information of the first defect block and position information of a replacement block replacing the first defect block. 3. The method of claim 2, And generating the last entry including positional information of the last defect block and positional information of a replacement block replacing the last defect block. The method according to claim 1, Information on the defect includes information on the number of the consecutive defect list entries and information on the number of defect list entries, and the number of single defect list entries is expressed by the following formula: 2 X < / RTI > consecutive defect list entries. ≪ RTI ID = 0.0 > 31. < / RTI > There is provided a computer readable recording medium on which a program for performing a defect management method for recording / reproducing data on an optical recording information storage medium is recorded, Allocating a replacement block for replacing a defect block related to a defect occurring in a user data area and an SA / DL area for recording information on the defect on the medium; And recording information on a defect including a consecutive defect list entry corresponding to information on the SA / DL area.

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