CN101312063B - Optical recording medium, recording/ reproducing device and method - Google Patents

Abstract

Provided are an optical recording medium, recording/reproducing device, and recording/reproducing method. The optical recording medium includes a user data area and an SA/DL area, wherein a replacement block for replacing a defective block in the user data area and information related to a defect corresponding to the defective block are recorded in the SA /DL area, wherein the defect-related information includes consecutive defect list entries including information about defects located in consecutive locations of the user data area.

Description

recording/reproducing device

This application is a divisional application of Application No. 200480039939.3 with the filing date of December 27, 2004 and titled "Optical Recording Medium, Recording/Reproducing Device, and Recording/Reproducing Method" submitted to the China Intellectual Property Office. the

technical field

The present invention relates to an optical recording medium, recording/reproducing device and recording/reproducing method for defect management. the

Background technique

Disc defect management is a process of compensating for data loss caused by defective blocks by writing defects recorded in the user data area of the disc, ie, user data in defective blocks, to a new part of the user data area. Generally, disk defect management is performed using a linear replacement method or a sliding replacement method. In these methods, a defective area is replaced with a non-defective spare area. In the sliding replacement method, a defective region is slid over and the next non-defective region is used. In the linear replacement method, a defective block of the user data area is called a defective block. A replacement block for replacing a defective block is recorded in a spare area in a predetermined portion of the disc. Information on defective blocks and replacement blocks, that is, information for searching positions of the defective blocks and replacement blocks is represented in the defect list. the

Generally, when a host reads data recorded on a disc, the host determines a logical address of the data and commands a hard disk drive to read the data. Then, the hard disk drive searches for a physical address corresponding to the logical address, and reads data recorded in a location on the disc corresponding to the physical address. If a defective block is present in the data corresponding to the physical address, the hard disk drive must look for a replacement block to replace the defective block. Thus, the defect list includes defect list entries, each entry containing information about each defective block respectively. That is, a defect list entry is generated for each defective block, thus requiring a considerable recording space for the defect list. the

invention disclosure

technical problem

Therefore, efficient management of space for defect lists is required. For this reason, it is necessary to effectively manage information on defective blocks, especially defective blocks occurring in consecutive positions of the user data area. the

technical solution

The present invention provides an optical disc on which defects are managed, a defect management device and method for efficiently managing the space required for a defect list in the disc for managing defects, and storage for controlling the device to execute the defect management method. computer readable disc of a computer program. the

Beneficial effect

According to the present invention, on an optical disc on which defect management is performed, a space for recording a defect list for defect management can be efficiently managed, so that the entire disc space can be efficiently managed. the

Description of drawings

FIG. 1 is a block diagram of a data recording/reproducing apparatus according to an embodiment of the present invention. the

FIG. 2 is a structural diagram of a single recording layer disc according to an embodiment of the present invention. the

FIG. 3 is a structural diagram of a dual recording layer disc according to an embodiment of the present invention. the

FIG. 4 is a data structure diagram of an SA/DL area according to an embodiment of the present invention. the

FIG. 5 is a detailed data composition diagram of DL#i shown in FIG. 4 . the

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

FIG. 7 is a reference diagram illustrating consecutive defective blocks according to an embodiment of the present invention. the

FIG. 8 is a reference diagram illustrating a continuous defect list according to an embodiment of the present invention. the

FIG. 9 is a diagram illustrating an example of replacement status information and continuous defect information shown in FIG. 6 . the

10A and 10B are reference diagrams illustrating consecutive defective blocks with replacement and consecutive defective blocks without replacement according to an embodiment of the present invention. the

Fig. 11A is a data structure diagram of DL #k shown in Fig. 10B. the

FIG. 11B is a data structure diagram of DL #k shown in FIG. 10B which also includes information on the number of consecutive defect list entries. the

FIG. 11C is a data structure diagram of DL#k shown in FIG. 10B, which also includes information on the number of consecutive defect list entries with replacement status information "0" and information on the number of consecutive defect list entries with replacement status information "1". Information about the number of consecutive defect list entries. the

12 is a flowchart of a defect management method for an optical disc on which defective areas are managed according to an embodiment of the present invention. the

best way

According to an aspect of the present invention, an optical recording medium on which a defect is managed includes a replacement block replacing a defective block in a user data area and an SA/DL area in which information related to the defect is recorded. The defect-related information includes consecutive defect list entries including information about defects located in consecutive locations of the user data area. the

The consecutive defect list entries may include: a start entry corresponding to information related to a first defective block; and an end entry corresponding to information related to a last defective block, wherein the first defective block and the last defective block belong to Defective blocks in consecutive locations of the user data area. the

The start entry may include location information on the first defective block and location information on a replacement block replacing the first defective block. the

The end entry may include location information about the last defective block and location information about a replacement block replacing the last defective block. the

The defect-related information may include information about the number of consecutive defect list entries. the

The defect-related information may also include information about the number of defect list entries. the

The number of individual defect list entries can be calculated by multiplying the number of consecutive defect list entries by a factor of 2 and subtracting the resulting product from the number of defect list entries. the

The defect-related information may include a defect list entry including location information about the defective block, location information about the replacement block, and status information about the defect. the

The status information may include replacement status information indicating whether the defective block is replaced, and continuous defect information indicating whether the defective block is a continuous defective block. the

The defect-related information may further include: information about the number of consecutive defect list entries having replacement status information indicating that the defective block is replaced. the

The defect-related information may further include: information about the number of consecutive defect list entries having replacement status information indicating that the defective block has not been replaced. the

According to another aspect of the present invention, an apparatus for recording/reproducing data on an optical recording medium comprises: a write/read unit for writing data on and/or reading data from said medium and a control unit, wherein the control unit allocates an SA/DL area for the medium, a replacement block for a defective block in the user data area and information related to the defect are recorded in the SA/DL area , and the control unit controls the write/read unit to record the defect-related information in the SA/DL area, the defect-related information includes consecutive defect list entries corresponding to the Information about defects located in consecutive locations in the user data area. the

According to another aspect of the present invention, a method of recording/reproducing data on an optical recording medium includes: allocating an SA/DL area for the medium, a replacement block for replacing a defective block in the user data area, and a replacement block corresponding to the The information related to the defect of the defective block is recorded in the SA/DL area; the information related to the defect is recorded in the SA/DL area, the information related to the defect includes a continuous defect list entry, the continuous defect list The entries correspond to information on defects located in consecutive positions of the user data area. the

According to another aspect of the present invention, there is provided a computer-readable optical disc storing a program for controlling an apparatus for recording/reproducing data on/from an optical disc on which defects are managed to perform a defect management method, The defect management method includes: allocating an SA/DL area for the medium, a replacement block for replacing a defective block in the user data area and information related to the defect are recorded in the SA/DL area; Defect-related information is recorded in the SA/DL area, the defect-related information including consecutive defect list entries corresponding to information about defects located in consecutive locations of the user data area. the

Detailed ways

Now, embodiments of the present invention will be described in detail, examples of which are shown in the accompanying drawings, in which like reference numerals denote like parts throughout. The embodiments are described below in order to explain the present invention by referring to the figures. the

FIG. 1 is a block diagram of a data recording/reproducing apparatus according to an embodiment of the present invention. the

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

According to the present invention, the write/read unit 2 includes a pickup, and records/reads data on/from the disc 4 on which defects are managed. The control unit 1 performs defect management according to the invention. In the embodiment of the present invention, the control unit 1 uses a verify-after-write method to find defective data by recording data in predetermined units and verifying the recorded data. The control unit 1 checks where defective data occurs by writing user data in recording operation units and verifying the user data. After checking the defective data, the control unit 1 generates defect information indicating where the defective data is located, stores the generated information in the memory as temporary defect information, and after collecting a predetermined amount of the generated information, generates information is recorded on the disk. the

In the embodiments of the present invention, a recording operation or a desired recording operation or the like as an operation determined by the user's intention refers to an operation including loading a disc, recording data on the disc, and unloading the disc. During said recording operation, a verify-after-write operation is performed at least once. Then, the temporary defect information obtained by using a verify-after-write operation is temporarily stored in a memory. the

When the user presses an eject button (not shown) in order to unload the disc, the control unit 1 determines that the recording operation is terminated, and reads the temporary defect information stored in the memory, supplies the information to the write/read unit 2, and makes This information is recorded on the disc. the

The control unit 1 includes: a system controller 10, a host I/F 20, a digital signal processor (DSP) 30, an RF AMP 40 and a servo mechanism 50. During the recording operation, the host I/F 20 receives a predetermined write command from the host 3 (in this embodiment, a computer), and sends the write command to the system controller 10. The system controller 10, under a write command received from the host I/F 20, controls the DSP 30 and the servo mechanism 50 to perform a recording operation. The DSP 30 adds additional data such as parity to the data to be recorded received from the host I/F 20 to correct data errors, and the DSP 30 performs ECC encoding, generates an ECC block as an error correction block, and performs the ECC block in a predetermined manner. The ECC block is modulated. The RF AMP 40 changes the data output from the DSP 30 into an RF signal. The write/read unit 2 records the RF signal sent from the RF AMP 40 on the disc 4. The servo mechanism 50 stores recording commands input from the system controller 10 and performs servo control on the pickup of the write/read unit 2 . the

The system controller 10 includes a defect management unit 11 and a memory unit 12 to manage defects. According to the present invention, the defect management unit 11 reads the temporary defect information stored in the memory unit 12, compiles the temporary defect information, and then generates a defect list. That is, when the defect management unit 11 finds information about consecutive defective blocks in the read defect information, the defect management unit 11 generates consecutive defect list entries, which include: a start entry, and information about the consecutive The information on the first defective block of the defective blocks corresponds; and the end entry corresponds to the information on the last defective block of the consecutive defective blocks. So even if say 8 defective blocks occur in a row, only 2 entries are produced, not 8 entries, because entries are not produced for each of the 8 blocks, but for the first block of 8 consecutive defective blocks and the last block produces entries. Therefore, the space required to store entries can be reduced. The defect management unit 11 also generates a DL entry, which includes: continuous defect information, indicating whether the defect is a continuous defect or a single defect; replacement status information, indicating whether there is a replacement block. The defect management unit 11 generates DL including such DL entries. the

In order to reproduce data, the host I/F 20 receives a read command from the host 3. The system controller 10 performs initialization necessary for reproduction. The write/read unit 2 projects a laser beam onto the disc 4, and outputs an optical signal obtained by receiving the laser beam reflected from the disc 4. The RF AMP 40 changes the optical signal output from the write/read unit 2 into an RF signal, sends modulated data obtained from the RF signal to the DSP 30, and sends a servo control signal obtained from the RF signal to the servo mechanism 50 . The DSP 30 demodulates the modulated data, and performs ECC error correction on the demodulated data. After receiving the servo signal from the RF AMP 40 and the command required to control the servo from the system controller 10, the servo mechanism 50 servo-controls the pickup. The host I/F 20 sends data received from the DSP 30 to the host 3. In order to control the reproduction of data, the system controller 10 controls the servo mechanism 50 to read data from the position where the data is recorded. the

The structure of an optical disc on which defects are managed according to an embodiment of the present invention is as follows. the

Disc Management Information (DMI) recorded on an optical disc according to an embodiment of the present invention includes: Disc Definition Structure (DDS), Recording Management Data (RMD), and Defect List (DL). The disc management area (DMA) on which the DMI is recorded includes: a temporary disc management area (TDMA), which is used to record temporary DMI when the disc is recorded; and a final disc management area (FDMA), which is used to record the final DMI. the

The TDMA for recording temporary DMI includes: a DDS/RMD area for recording DDS and RMD; and a DL area for recording DL. the

The DDS includes: position information about the SA/DL area in which a replacement block and DL are recorded, and when a defect occurs in a data block recorded in the data area, the replacement block replaces the defective block; about the DDS Location information of the /RMD area; location information on where the DL is recorded; location information that can be used to replace data in the SA/DL area or to update the DL; consistency flag to check whether the disc is being used normal ejection; and write protection information to prevent writing. the

RMD is information related to the data recorded on the management disc, including: R zone entry, showing the status of each R zone in sequential recording mode; Whether data related to each recording unit block of the user area is recorded. the

In a single recording layer disc, the DDS/RMD area for recording DDS and RMD is arranged in the lead-in area or lead-out area, while in a dual recording layer disc, the DDS/RMD area is arranged in the lead-in area, middle area or lead-out area. in the district. The DDS/RMD area may be allocated in a part of the data area to increase the number of possible updates according to the drive manufacturer's or user's intention when the disc is initialized for use. the

When it is no longer possible to record more data on the disc, or the user wants to keep the current state of the disc without recording additional data and use the disc only for reproduction, disc finalization is performed, and the final disc management information is recorded in FDMA. the

The PCA area is arranged for a test of detecting an optimum recording power from among various recording powers according to a writing strategy and detecting variations according to the writing strategy. the

FIG. 2 is a structural diagram of a single recording layer disc according to an embodiment of the present invention. the

Referring to FIG. 2, the lead-out area is formed toward the periphery of the disc, the lead-in area is formed toward the center of the disc, and the data area is formed between the lead-out area and the lead-in area. the

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

FIG. 3 is a structural diagram of a dual recording layer disc according to an embodiment of the present invention. the

Referring to FIG. 3, the lead-in area, data area #0, and middle area #0 are arranged in one recording layer L0, and the middle area #1, data area #1, and lead-out area are sequentially arranged in another recording area L1. the

In layer L0, the lead-in area includes: PCA #0, FDMA #2, DDS/RMD area #0, and FDMA #1. The data area includes SA/DL area #0 and user area #0. Middle area #0 includes: FDMA #3, DDS/RMD area #2, FDMA #4 and PCA #1. On the other hand, in layer L1, middle area #1 includes: FDMA #3, DDS/RMD area #3, FDMA #4, and PCA #3. Data zone #1 includes: SA/DL zone #1 and user zone #1. The lead-out area includes PCA #2, FDMA #2, DDS/RMD area #1, and FDMA #1. the

As shown in FIGS. 2 and 3, when a defect occurs in the user area, a replacement block replacing the defective block is recorded in the SA/DL area together with information on the defect. The information on defects includes position information on defective blocks, position information on replacement blocks, and information on consecutive defects. the

FIG. 4 is a data structure diagram of an SA/DL area according to an embodiment of the present invention. the

Referring to FIG. 4 , SA/DL area #i includes: DL #0, replacement block #1 ... replacement block #k, DL #1, replacement block #k+1 ... DL #m . the

DL#0 is a defect list including information on defects, including initialization information. the

Substitution blocks from replacement blocks #1 to #k are provided next to DL#0, and these replacement blocks replace defective blocks from defective blocks #1 to #k. DL#1 is a defect list including information on defective blocks from defective block #1 to #k and information on replacement blocks from replacement block #1 to #k, DL#1 is followed by replacement block #k Record. Replacement blocks from replacement blocks #k+1 to #m are set next to DL#1, and these replacement blocks replace defective blocks from defective blocks #k+1 to #m with respect to defects occurring in the user area. the

In this way, a defect list including information on defects according to an embodiment of the present invention is recorded in the SA/DL area in which a replacement block replacing a defective block is also located. That is, the defect list and the replacement block are located in one area, not in separate areas. the

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

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

The DL identifier 210 is an identifier indicating a defect list. That is, since the defect list is located in the SA/DL area together with the replacement block according to the present embodiment of the present invention, an identifier indicating the defect list is required. the

The DL update counter 220 is a value indicating the number of updates of the defect list. the

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

DL entry #1 240 or DL entry #2 250 is an entry with information about defects. Examples of contents included in these DL entries are shown in FIG. 6 . the

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

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

Status information 310 is status information about a defect represented by a corresponding DL entry. The defective block location information 320 represents location information related to a defective block recorded on the user area, such as a sector number of the defective block. The replacement block location information 330 represents location information related to a replacement block recorded on the SA/DL area, such as a physical sector number of the replacement block. the

The status information 310 includes: replacement status information 311 with a length of 1 bit, and continuous defect information 312 with a length of 2 bits. the

Replacement status information 311 indicates whether a defective block present in the user area has been replaced. That is, the information indicates whether the defective block in the user area is replaced and the replacement block exists in the SA/DL area, or the defective block is not replaced and the replacement block does not exist in the SA/DL area. the

The consecutive defect information 312 indicates whether the DL entry is a consecutive DL entry representing consecutive defective blocks, and if the DL entry is a consecutive DL entry, whether the DL entry is the start of the consecutive DL entry or the end of the consecutive DL entry. the

Hereinafter, consecutive defective blocks and consecutive defect list entries will be described with reference to FIGS. 7 and 8 . the

Referring to FIG. 7, ① to ⑦ refer to units in which a verify-after-write operation is performed. The recording device records user data onto sector ①, and then returns to the initial part of sector ① to check whether the data is recorded correctly or is defective. If a defective portion is detected, that portion is designated as a defective area. Therefore, defect #1 as a defective area is designated. The recording device records the data recorded in defect #1 again in the SA/DL area. The portion in which the data recorded in Defect #1 is recorded again is called Replacement #1. Then, the recording device records the user data to sector ②, and then returns to the initial part of sector ② to check whether the data is recorded correctly or is defective. If a defective part is detected, that part is designated as defect #2. In the same manner, replacement #2 corresponding to defect #2 is generated. In Section ③, Defect #3 and Replacement #3 are generated. Since no defective portion is detected in the section ④, there is no defective area in this section. the

When the termination of the recording operation #0 is foreseen after recording and verifying to section ④ (when the user presses the eject button or the recording of the user data allocated in this recording operation is completed), the recording device records in the SA/DL area DL#1 which includes information on defects #1, #2, and #3 appearing in sections ① to ④. the

During the recording operation #1, the recording device records user data to the sector ⑤, and then returns to the initial part of the sector ⑤ to check whether the data is correctly recorded or defective. If a defective portion is detected, that portion is designated as a defective area. In this way, since defect #4 and defect #5 which are defective areas have successively occurred, consecutive blocks are designated as defective blocks. The recording device re-records the data recorded in defect #4 and defect #5 in the SA/DL area. Then, the recording device records the user data to the section ⑥, and then returns to the initial part of the section ⑥ to check whether the data is recorded correctly or is defective. If defect #6 and defect #7, which are defective areas, appear consecutively, the consecutive blocks are designated as defective blocks. The recording device records the data recorded in defect #6 and defect #7 in the SA/DL area again. In section ⑦, no defective portion is detected, so there is no defective area. When the termination of recording operation #1 is foreseen, the recording apparatus records DL #2 including information on defects #4 to #7 in the SA/DL area. the

Defective blocks occurring in consecutive positions of the user area, such as a defect occurring in recording operation #1, are consecutive defective blocks. The first defective block of the consecutive defective blocks is defect #4, and the last defective block is defect #7. the

Replacement blocks replacing consecutive defective blocks appearing consecutively in predetermined positions in the user area are recorded in consecutive positions in the SA/DL area. As shown in the SA/DL area, a replacement block #4 replacing the defective block #4 is arranged. At the next position, a replacement block #5 replacing the defective block #5 is arranged. At the next position, a replacement block #6 replacing the defective block #6 is arranged. Then, at the next position, a replacement block #7 replacing the defective block #7 is arranged. The first replacement block among the replacement blocks that replace consecutive defective blocks is replacement block #4, and the last replacement block that replaces these consecutive defective blocks is replacement block #7. the

When continuous defective blocks appear in continuous positions, due to the characteristic that the defective blocks included in the continuous defective blocks are located in continuous positions, as long as the position of the first block and the last block of the continuous defective blocks are known, it can be obtained from The positions of the first and last blocks know the positions of the remaining blocks included in consecutive defective blocks. Therefore, by including only information on the first defective block and the last defective block of consecutive defective blocks among the information on defects, the space required for recording information on defects can be reduced. The same applies to replacement blocks that replace consecutive defective blocks. the

Accordingly, as shown in FIG. 8, consecutive defect list entries showing information on consecutive defective blocks may include a start entry and an end entry. the

Referring to FIG. 8, consecutive defect list entries include a start entry and an end entry. Both the start entry and the end entry have the same structure as the DL entry shown in FIG. 6 . The start entry contains information about the first defect in the sequence of defects, and the end entry contains information about the last defect in the sequence of defects. the

The start entry includes: status information; first defective block position information, indicating the position where the first defective block in consecutive defective blocks is recorded in the user area; first replacement block position information, indicating the first replacement block that replaces the first defective block Blocks are recorded at locations in the SA/DL area. The end entry includes: status information; last defective block position information, indicating the position where the last defective block in consecutive defective blocks is recorded in the user area; last replacement block position information, indicating that the last replacement block replacing the last defective block is recorded in the SA location in the /DL area. the

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

Referring to FIG. 9, bits representing replacement state information are '0' and '1'. If the replacement status information 311 is "1", the defective block corresponding to the defective block location information 320 is not replaced, and only the defective location is shown. If the replacement status information 311 is '0', the defective block corresponding to the defective block location information 320 is replaced by the replacement block corresponding to the replacement block location information 330 . the

Bits representing continuous defect information are "00", "01" and "10". If the consecutive defect information 312 is "00," the DL entry is not a consecutive defect list entry, but a single defect list entry. In this case, depending on the value set as the replacement state information, the DL entry may indicate a defective block with replacement or a defective block without replacement. In the case of a defective block with replacement, the DL entry has defective block location information and replacement block location information. In the case of no replaced defective block, the DL entry has only defective block location information. the

If the consecutive defect information 312 is '01', the DL entry indicates a start entry of consecutive defect list entries. Therefore, as shown in FIG. 8, the DL entry has first defective block location information about consecutive defective blocks and first replacement block location information about consecutive replacement blocks. the

If the consecutive defect information 312 is '10', the DL entry indicates an end entry of consecutive defect list entries. Therefore, as shown in FIG. 8, the DL entry has last defective block location information about consecutive defective blocks and last replacement block location information about consecutive replacement blocks. the

Hereinafter, assignment of 3-bit combinations of status information 311 having a length of 1 bit and continuous defect information 312 having a length of 2 bits will be described. the

If the 3-bit combination is '000', the DL entry indicates a single defect list entry for a single defective block and the status of the single defective block having a replacement block. Therefore, a DL entry has defective block location information and replacement block location information. the

If the 3-bit combination is "100", the DL entry indicates a single defect list entry for a single defective block and a status that the single defective block has no replacement block. Therefore, a DL entry has defective block location information, but not replacement block location information. the

If the 3-bit combination is "001", the DL entry represents the start entry of consecutive defect list entries of consecutive defective blocks, and the defective block that is the first defective block in the consecutive defective blocks corresponding to the start entry has a replacement block . Accordingly, the DL entry has location information on the first defective block among consecutive defective blocks and location information on the first replacement block among consecutive replacement blocks that replace the consecutive defective blocks. the

If the 3-bit combination is "010", the DL entry represents the end entry of consecutive defect list entries of consecutive defective blocks, and the defective block that is the last defective block in the consecutive defective blocks corresponding to the end entry has a replacement block. Accordingly, the DL entry has position information on the last defective block among consecutive defective blocks and position information on the last replacement block among consecutive replacement blocks replacing the consecutive defective blocks. the

If the 3-bit combination is "110", the DL entry represents the end entry of consecutive defect list entries of consecutive defective blocks, and the defective block that is the last defective block in the consecutive defective blocks corresponding to the end entry has no replacement block. Therefore, the DL entry has position information on the last defective block among consecutive defective blocks, but has no position information on the last replacement block among consecutive replacement blocks that replace the consecutive defective blocks. the

10A and 10B are reference diagrams illustrating continuous defect information according to an embodiment of the present invention. the

FIG. 10A shows a user area in which user data is recorded, and FIG. 10B shows an SA/DL area in which replacement blocks and defect lists are recorded. the

Referring to FIG. 10A, a single defective block a as the first defect occurs at user area position '5'. Successive defective blocks b, c, d, and e as second defective blocks appear at consecutive positions "9" to "12". Consecutive defective blocks f, g, h, and i, which are third defective blocks, appear at consecutive positions "17" to "20". the

Referring to FIG. 10B, a replacement block that replaces a defective block occurring in a user area and a defect list are shown in the SA/DL area. the

A single replacement block a' replacing a single defective block a is arranged at position "55" of the SA/DL area. Successive replacement blocks b', c', d', and e' that successively replace successive defective blocks b, c, d, and e are arranged at positions "56" to "59" of the SA/DL area. The defect list DL#k updated after the fourth consecutive defect is recorded at position "60". Consecutive defective blocks f, g, h and i have no replacement blocks. Information included in the defect list DL#k is shown in FIG. 11A. the

Fig. 11A is a data structure diagram of DL #k shown in Fig. 10B. the

11A, DL#k 400 includes: DL identifier 410, DL update counter 420, DL entry quantity 430, and 5 DL entries, namely DL entry #1 440, DL entry #2 450, DL entry #3 460, DL entry #4 470 and DL entry #5 480. the

The DL identifier 410 is an identifier indicating DL. In the DL update counter 420, "K" is recorded as the number of times of DL update. In the DL entry number 430, "5" is recorded as the total number of entries included in DL #K. the

DL entry #1440 is an entry related to a single defective block a shown in FIG. 10A. In DL entry #1440, "0" is recorded as replacement status information, "00" as continuous defect information, "5" as defective block position information, and "55" as replacement block position information. the

DL Entry #2 450 and DL Entry #3 460 include consecutive defect list entries. the

DL entry #2450 is the start entry of consecutive defect list entries, and DL entry #3460 is the end entry of consecutive defect list entries. That is, DL entry #2 450 is an entry related to the first defective block b among the consecutive defective blocks shown in FIG. 10A. In DL entry #2450, since the defective block b is replaced, "0" is recorded as replacement status information. Since DL entry #2450 is the start entry of consecutive defect list entries, "01" is recorded as consecutive defect information. "9" is recorded as the position information of the defective block b, and "56" is recorded as the position information of the replacement block b'. the

DL entry #3 460 is an entry related to the last defective block e among consecutive defective blocks shown in FIG. 8 . In DL entry #3 460, since the defective block e is replaced, "0" is recorded as the replacement status information. DL entry #3 460 is the end entry of the consecutive defect list entries, so "10" is recorded as the consecutive defect information. "12" is recorded as the position information of the defective block e, and "59" is recorded as the position information of the replacement block e'. the

DL Entry #4 470 and DL Entry #5 480 include consecutive Defect List entries. the

DL entry #4 470 is the start entry of consecutive defect list entries and DL entry #5 480 is the end entry of consecutive defect list entries. That is, DL entry #4470 is an entry related to the first defective block f among the consecutive defective blocks shown in FIG. 10A. In DL entry #4470, because the defective block f has not been replaced, "1" is recorded as the replacement status information. Since DL entry #4 470 is the start entry of consecutive defect list entries, "01" is recorded as the consecutive defect information. "17" is recorded as the position information of the defective block f. Since a replacement block to replace the defective block f does not exist, "00" is recorded as the replacement position information. the

DL entry #5 480 is an entry related to the last defective block i among the consecutive defective blocks shown in FIG. 10A. In DL entry #5 480, "1" is recorded as the replacement status information because the defective block i was not replaced. Since the DL entry #5 480 is the end entry of the consecutive defect list entries, "10" is recorded as the consecutive defect information. "20" is recorded as the position information of the defective block i. Since a replacement block that replaces the defective block i does not exist, "00" is recorded as the replacement block position information. the

FIG. 11B is a structural diagram of DL #k shown in FIG. 10B , which also includes information on the number of consecutive defect list entries. the

DL #k shown in FIG. 11B is similar to DL #k shown in FIG. 11A except that DL #k shown in FIG. 11B also includes the number 490 of consecutive defect list entries. Referring to FIG. 10 , since there are two consecutive defect list entries, '2' is recorded as the number of consecutive defect list entries 490 . the

By including a field for the number of consecutive defect list entries, the number of consecutive defect list entries and the number of individual defect list entries in the defect list can be known without searching all DL entries. As shown below, the number of individual defect list entries can be calculated from the number of DL entries and the number of consecutive defect list entries. the

The number of single defect list entries = the number of DL entries - 2 × the number of consecutive defect list entries. the

The above expression can be formed because consecutive defect list entries include a start entry and an end entry. the

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

Fig. 11C is a data structure diagram of DL#k shown in Fig. 11B, and this DL#k also includes: information related to the number of consecutive defect list entries with replacement status information "0"; 1” information about the number of consecutive defect list entries. the

DL #k shown in FIG. 11C is similar to DL #k shown in FIG. 11B, except that DL #k shown in FIG. 11C further includes: and information 510 about the number of consecutive defect list entries with replacement status information "1". Referring to FIG. 11A, a consecutive defect list entry having replacement state information "0" is a consecutive defect list entry including DL entry #2 450 and DL entry #3 460. Since the number of consecutive defect list entries with replacement status information "0" is 1, "1" is recorded as the number of consecutive defect list entries with replacement status information "0" 500. A consecutive defect list entry with replacement status information "1" is a consecutive defect list entry including DL entry #4 470 and DL entry #5 480. Since the number of consecutive defect list entries with replacement status information '1' is 1, '1' is recorded as the number of consecutive defect list entries with replacement status information '1' 510 . the

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

Referring to FIG. 12, in operation 1201, a recording apparatus records user data in a data area in a unit in which a post-write verify operation is performed. Next, in operation 1202, the data recorded in operation 1201 is verified to find a portion where a defect occurs. In operation 1203, the control unit 1 designates a portion where a defect occurs as a defective area, re-records the data recorded in the defective area in the SA/DL area to generate a replacement area, generates information related to the defective block and the replacement block, and Record this information in memory. Operations 1201 to 1203 are repeated until the termination of the recording operation is predicted. the

When user data is recorded according to user input, or the recording operation is completed and its termination is predicted in operation 1204, in operation 1205, the control unit 1 of the recording apparatus reads information on defects stored in the memory. the

If there is information about consecutive defects in the read information about defects, a consecutive defect list entry including a start entry corresponding to the information about the first defect of the consecutive defects and an end entry corresponding to the end entry is generated. The entry corresponds to the information about the last defect, and in operation 1206, the DL is also generated by including continuous defect information showing whether the defect is a continuous defect or a single defect, and replacement status information displayed in Whether there is a replacement block in each DL entry. the

In operation 1207, the generated DL is recorded in the SA/DL area. the

The disc defect management method described above can also be implemented as computer readable codes stored on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording media storing computer-readable data. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, stereo tape, floppy disk, and optical data recording device. The computer-readable recording medium may also be a carrier wave (for example, transmitted via the Internet). In computer-readable recording media distributed to computer systems connected via a network, codes that can be read by computers in a distributed method can be stored and executed. Functional programs, codes, code segments for realizing the disc defect management method can be easily deduced by programmers in the technical field to which the present invention belongs. the

While several embodiments of the present invention have been shown and described, it should be understood by those skilled in the art that changes may be made to these without departing from the principles and spirit of the invention, whose scope is defined in the claims and their equivalents. Example changes. the

Industrial availability

The present invention is applicable to an optical recording medium, a recording/reproducing device, and a recording/reproducing method for defect management. the

Claims (2)

1. An apparatus for recording data on and/or reproducing data from an optical recording medium, said apparatus comprising: a write/read unit for writing data to and/or reading data from the optical recording medium; a control unit, detecting consecutive defective blocks from the optical recording medium, and generating consecutive defect list entries, the consecutive defect list entries including start entries and end entries respectively corresponding to the first defective block and the last defective block in the consecutive defective blocks, Wherein, the start entry includes the status information and location information of the first defective block, and the location information of the replacement block used to replace the first defective block; the end entry includes the status information and location information of the last defective block, and The location information of the replacement block used to replace the last defective block, Wherein, the status information includes replacement status information and continuous defect information; wherein, the replacement status information indicates whether the defective block is replaced; the continuous defect information indicates whether the defect list entry is a continuous defect list entry, and if the defect list entry is a continuous defect list entry, then whether the defect list entry is the start entry or the end entry. 2. An apparatus for recording data on and/or reproducing data from an optical recording medium, said apparatus comprising: a write/read unit for writing data to and/or reading data from the optical recording medium; a control unit, controlling the write/read unit to read consecutive defect list entries from the optical recording medium, the consecutive defect list entries including a start entry and an end entry respectively corresponding to the first defective block and the last defective block in the consecutive defective blocks, Wherein, the start entry includes the status information and location information of the first defective block, and the location information of the replacement block used to replace the first defective block; the end entry includes the status information and location information of the last defective block, and The location information of the replacement block used to replace the last defective block, Wherein, the state information includes replacement state information and continuous defect information; wherein, the replacement state information indicates whether the defective block is replaced; the continuous defect information indicates whether the defect list entry is a continuous defect list entry, and if the defect list entry is a continuous defect list entry, then whether the defect list entry is the start entry or the end entry.

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