KR100618996B1 - Method of verifying defect management area information of optical disc - Google Patents

Abstract

The present invention discloses a method for confirming defect management area information of an optical disc. The present invention performs a test mode for an operation in which DMA information is generated / modified in a recording / reproducing apparatus for recording / reproducing an optical disk having defect management area (DMA) information, and then checks whether the DMA information is properly generated / modified. A method comprising: reading DMA information generated / modified and verifying the read generated / modified DMA information using predetermined reference DMA information for a test mode to provide a confirmation result, Depending on the test type, it is possible to easily check whether the recording / reproducing apparatus properly generates / modifies the defect information by using a test disk having predetermined defect information not related to the actual defect instead of the disc having the actual defect.

Description

Method of verifying defect management area information of optical disc}

1 is a table showing check items for confirming a DMA structure.

2 is a table showing check items for confirming a DDS structure.

3 is a table showing check items for confirming a PDL structure.

4 is a table showing check items for confirming an SDL structure.

5A to 5D are flowcharts according to an embodiment of a method for confirming defect management area information according to the present invention.

TECHNICAL FIELD The present invention relates to the field of recording / reproducing optical discs, and more particularly, to a method for identifying defect management area information of an optical disc capable of recording / reproducing.

Digital Versatile Disc Random Access Memory (DVD-RAM) discs have a function to replace defects on a disc with a normal recording area. Such a function is referred to as defect management, and information necessary for defect management is referred to as a defect management area on a disc. It is stored in a place called Defect Management Area (DMA). In the DMA, four pieces of information are repeatedly recorded at two positions in the lead-in area and the lead-out area on the disk. The DMA information is further divided into a Disc Defintion Structure (DDS), a Primary Defect List (PDL), and a Secondary Defect List (SDL).

This DMA information includes not only information about defects detected during initialization or use of the disk, but also information on free space and the start logical sector number for each zone. It contains important information.

The information contained in the DMA can be read and used immediately, but it also includes information that changes depending on the location and number of defects on the disk. This information is based on complex calculations based on algorithms based on the defect information registered in the DMA. There are also things that can be obtained. This corresponds to the starting logical sector number or location information of the first logical sector number of each region.

Such DMA information is closely related to the physical recording position of the data, so that a disk on which one DMA information is created or revised can be used by another recording / reproducing device, that is, moving like an optical disk. Possible recording mediums have a problem of compatibility between recording / reproducing apparatus when the DMA information is wrong. In order to solve this problem, there is a need for a means or method for confirming that the recording / reproducing apparatus correctly decodes the DMA information from the disc and accurately records the DMA information on the disc.

 Accordingly, it is an object of the present invention to detect defects on a disc through an optical disc recording / reproducing apparatus and to confirm whether or not DMA information on the disc is correctly recorded / modified in recording the information on the defect in the defect management area (DMA). To provide a method for doing so.

It is another object of the present invention to detect defects on a disc through a DVD-RAM recording / reproducing apparatus capable of repeating recording / playback a plurality of times, and in recording DMA information on defects, the DMA information on the disc is accurately recorded / modified. To provide a way to check if there is.

It is still another object of the present invention to use a test disc that uses predetermined defect information that is not related to an actual defect, and to always maintain the same condition without being affected by the actual state of the disc in which the defect information is formed in the optical disc recording / reproducing apparatus. It is intended to provide a way to verify that defect information can be correctly decrypted and processed.

In order to achieve the above object, the verification method according to the present invention performs a test mode for an operation in which DMA information is generated / modified in a recording / reproducing apparatus for recording / reproducing an optical disk having defect management area (DMA) information. A method for confirming whether DMA information is properly generated / modified after the operation is performed, the method comprising: reading out the generated / modified DMA information and using the predetermined reference DMA information for the test mode by reading the generated / modified DMA information. Identifying and providing a verification result.

Hereinafter, a preferred embodiment of a method for confirming defect management area information of an optical disc according to the present invention will be described with reference to the accompanying drawings.

The optical disk used in the present invention is, for example, a DVD-RAM of a phase change recording method having a capacity of 4.7 GB (Giga Bytes). DVD-RAM refers to a disc defined in the DVD specification for Rewritable disc version 2.0.

For DVD-RAM discs, all fault management is handled by the drive, so the file system or host interface can record / play back files without knowing this physical fault management content, so most drives write or play back in the fault management area. Not only is it impossible to operate, but there are no standard commands for recording / reproducing in this defect management area. However, in order to determine whether the information in the defect management area is properly formed, it is necessary to make the data readable in a computer that can analyze it in any form, and in order to make a standard test disc, information appropriate for the defect management area is required. It should be possible to record it.

The recording / reproducing system of the DVD-RAM recording / reproducing apparatus may include a file system layer, a host interface layer connecting the host computer and the recording / reproducing apparatus, a physical drive layer for recording / reproducing a physical signal, and Record and decrypt the DMA information because the physical sector number of the disk is assigned by the recording media layer and the like, and the logical sector number of the disk is assigned by the host interface and file system. Is done below the physical drive hierarchy.

However, when recording user data in an actual file system, only logical sector numbers are used to transfer user data to the recording / reproducing apparatus, and the recording / reproducing apparatus converts the logical sector number to the physical sector number where the actual data should be recorded. The defect management information is used during the conversion. Thus, if one record / reproducing apparatus incorrectly reads the defect management information, and if the wrong recording is made, there is a problem that the correct data cannot be read or written by the other recording / reproducing apparatus.

The present invention uses a first test disk having a known physical defect on a blank disk that contains no information in an initialization mode without verification and an initialization mode with verification. Reinitialization with certification mode, Reinitialization with SDL list conversion mode, and Reinitialization with clearing G2 list and SDL mode on the first test disc. In a mode in which a DMA having a predetermined content is recorded in the second frame and the first mirror file in which the additional free space is not full, the first mirror file is recorded, and in which the additional free space is expanded, the second test disk is checked. The DMA with the predetermined contents is written on the disk and the additional free space is full. In the mode of using a third test disk on which a second mirror file having a sufficient SDL defect is recorded and checking whether or not recording is performed by incorrect DMA information, each region of the predetermined DMA contents on the first test disk is checked. Using the fourth test disk on which the third mirror file with the starting logical sector number of the intentionally wrong state was recorded, the defect management area information created / modified according to the mode performed by performing each verification mode is correctly This is to check if it is created / modified. Here, the reinitialization mode with the SDL list conversion and the reinitialization mode for clearing the G2 list and the SDL may be referred to as a reinitialization mode without verification, and a simple blank state in which no data is recorded in the verification mode without verification is recorded. 1 Test discs can be used.

The DMA information generated / modified in each of the above confirmation modes includes a DMA structure, a DDS structure, a PDL structure, an SDL structure, and the like. First, a check item for checking the DMA structure includes an error in the DMA as illustrated in FIG. 1. Status, DDS / PDL, SDL update counter, DMA contents, and so on.

The DMA error status item checks whether an error exists in the DMA existing in the lead-in area and the lead-out area, respectively. The errors are not corrected in the four DMA1, DMA2, DMA3, and DMA4. If no errors are found in any of the DMAs, this check is unsuccessful and the test must be retried using a new disk.

In the initialization mode without verification to check the DDS / PDL and SDL revision counter items, the DDS / PDL revision counter value in four DDS1, DDS2, DDS3 and DDS4 and the DDS / PDL revision in four SDL1, SDL2, SDL3 and SDL4 It is checked whether the value of M representing the counter value and the value of k representing the increment of the counter are both "0" and all eight values of the DDS / PDL revision counters are equal.

Here, the DDS / PDL revision counter value indicates the total number of revision and rewrite operations for the DDS / PDL block, and should be set to "0" at the beginning of initialization, when the DDS / PDL block is revised or rewritten. It should be incremented by one and both DDS / PDL and SDL blocks should have the same revision counter value when initialization is completed.

In addition, it is checked whether the value of N indicating the SDL revision counter value in the four SDL1, SDL2, SDL3, and SDL4 and the value of k indicating the increment of the counter are all "0" and all four values of the SDL revision counters are the same. Done.

However, in the initialization mode without verification, since only one DMA generation operation occurs, no modification process is included. Therefore, the DDS / PDL revision counter value should be set to "0", which is a value set when the first DMA is written.

In the initialization mode with verification, the value of M representing the DDS / PDL revision counter values in four DDS1, DDS2, DDS3 and DDS4 and the DDS / PDL revision counter values in four SDL1, SDL2, SDL3 and SDL4 is "0". Then, it is checked whether the value of k representing the increment of the counter is "1". In addition, the value of N indicating the SDL revision counter value in the four SDL1, SDL2, SDL3, and SDL4 is "0", and the value of k indicating the increment of the counter is "1" and the four values of the SDL revision counters are Check if all are the same.

It records the basic structure of the DMA before starting verification to determine a disk defect, and sets the bit value indicating "In-Progress" among the disk verification flags in the DDS of the DMA before starting verification to set to "1b". In the situation, the value of the revision counter is to start verification at the initial value "0", and when the verification is completed, the information of the defect is recorded in the DMA and the counter is increased by one.

In reinitialization mode without verification, the value of M representing the DDS / PDL revision counter values in four DDS1, DDS2, DDS3, and DDS4 and the DDS / PDL revision counter values in four SDL1, SDL2, SDL3, and SDL4 is "Previous Value "and the value of k indicating the increment of the counter is" 1 ", and all eight values of the DDS / PDL revision counters are equal. In addition, whether the value of N indicating the SDL revision counter value in the four SDL1, SDL2, SDL3, and SDL4 is the "previous value", the value of k indicating the increment of the counter is "1", and the four values of the SDL revision counters. It checks to see if they are the same.

In reinitialization mode with verification, the value of M representing the DDS / PDL revision counter values in four DDS1, DDS2, DDS3 and DDS4 and the DDS / PDL revision counter values in four SDL1, SDL2, SDL3 and SDL4 is "Previous Value "and the value of k indicating the increment of the counter is" 2 ", and all eight values of the DDS / PDL revision counters are equal. In addition, whether the value of N indicating the SDL revision counter value in the four SDL1, SDL2, SDL3, and SDL4 is the "previous value", the value of k indicating the increment of the counter is "2", and the four values of the SDL revision counters. It checks to see if they are the same.

In addition, to confirm the DMA contents, it is checked whether all four DMA1, DAM2, DMA3, and DMA4 contents are identical.

On the other hand, the check items for checking the DDS structure in the DMA, as shown in Figure 2 DDS identifier, disk verification flag, DDS / PDL revision counter, the number of groups, the number of regions, the location of the initial free space, the first logic The position of the sector number LSN0, the start logical sector number position of each region, and the like.

That is, it is checked whether the DDS identifier is "0A0Ah", and it is checked whether the value of the bit position b7 indicating whether it is in-progress among the 1-byte disk verification flags is "0b", and at this time, the value of the bit position b7 If "0b" indicates that formatting is completed, if "1b" indicates that formatting is in progress, if "1b" indicates that the formatting has failed.

b2가 모두 "0b"인지를 체크하고, 디스크 검증 플래그 중에서 사용자 검증 플래그를 나타내는 비트 위치 b1의 값이 검증이 없는 초기화 모드에서는 "0b"인지를 체크하고, 검증을 갖는 초기화, 검증이 없는 재초기화와 검증을 갖는 재초기화 모드에서는 "1b"인지를 체크한다. 디스크 검증 플래그 중에서 디스크 제조업자 검증 플래그를 나타내는 비트 위치 b0의 값이 검증이 없는 초기화와 검증을 갖는 초기화 모드에서는 "0b"인지를 체크하고, 검증이 없는 재초기화와 검증을 갖는 재초기화 모드에서는 "1b"인지를 체크한다.Also, the bit position b6 reserved in the disk verify flag.

Check if b2 is all "0b", check if the value of bit position b1 indicating user verification flag among the disk verification flags is "0b" in the initialization mode without verification, initialize with verification, reinitialization without verification In reinitialization mode with verification, we check if "1b" Among the disk verification flags, it is checked whether the value of the bit position b0 indicating the disk manufacturer verification flag is "0b" in the initialization mode without verification and the verification mode, and in the reinitialization mode with verification and reinitialization without verification. 1b ".

In order to check the DDS / PDL revision counter item, in the initialization mode without verification, check whether the value of M representing the DDS / PDL revision counter and the value of k representing the increment of the counter are both "0". Checks whether the value of M that represents the DDS / PDL revision counter is "0" and the value of k that represents the increment of the counter is "1." Check if the value is "previous value" and the value of k, which represents the increment of the counter, is "1". In the reinitialization mode with verification, the value of M representing the DDS / PDL revision counter is "previous value" and the counter It is checked whether the value of k representing the increment of is "2".

It is checked whether the number of groups is "0001h" representing one and "0023h" representing 35 regions. The position of the initial free space checks whether the first sector number of the initial free space is "031000h" and the sector number of the last sector is "0341FFh".

If the position of the first logical sector number LSN0 is a predetermined logical sector number corresponding to the case where there is no defect in the initialization mode without verification, and the initialization with verification, the reinitialization without verification, and the reinitialization with verification Check whether it is determined by the number of defects registered in the PDL.

The starting logical sector number of each region, that is, the starting logical sector number of the second region (Zone 1) to the 35th region (Zone 34) is a predetermined logical sector number corresponding to no defect in the initialization mode without verification. In the initialization with verification, reinitialization without verification, and reinitialization with verification mode, it is checked whether it is determined by the number of defects registered in the PDL. In this case, all information about the defective sector of the first test disk, which is known in advance, must be registered as the defective sector in the PDL to check whether the structure of the PDL is correct and whether the drive to be tested correctly detects the defect. have.

Here, in the mode for confirming whether or not recording is performed by wrong DMA information, the starting sector number of each region is intentionally recorded incorrectly.

Check that all remaining reserved areas (byte positions 396 to 2047) of the DDS structure are all "00h".

The check items for checking the PDL structure in the DMA are the PDL identifier, the number of items in the PDL, the Integrity of the PDL items, and the like, as shown in FIG.

Check that the PDL identifier is "0001h", and in initialization mode without verification, the number of items in the PDL has a value of "0"; in other modes, the number of items in the PDL is already known physical defects and disc manufacturing process. Checks the number of defects, including those that occur differently on different disks.

In the initialization mode without verification, since information should not exist in the area where the PDL item type and the content of the item are stored, it is checked whether "FFh" represents an unused area.

In the initialization mode with verification, it is checked whether the PDL item type is " 10b " representing a G1 list which is a defective sector generated during user verification, and the defective sector numbers of the PDL are written in ascending order of sector numbers. After all PDL items corresponding to the number of physical defects known are written, and all information on defective sectors that occur differently for each disk in the manufacturing process of the disk is written, it is checked whether the remaining unused area is "FFh".

Here, the defect sectors inspected at the factory are called P lists, the defect sectors generated at the time of user verification are called G1 lists, and when reinitialization, the old SDL converted before reinitialization is called G2 list. P list, G1 list and G2 list belong to PDL.

In the case of reinitialization with verification, it is checked whether the PDL item type is "00b" representing a known P list or "10b" representing a G1 list which is a defective sector generated at the time of user verification, and the defective sector number of the PDL is the sector number. Are written in ascending order.

In reinitialization mode with SDL conversion, the PDL item type can represent all three types, either "00b" representing a P list or "10b" representing a G1 list that is a defective sector that occurred during user verification, or G2 after SDL conversion. It may be " 11b " representing a list, and defective sector numbers of the PDL are written in ascending order of sector numbers.

Here, the reinitialization mode with SDL list transformation removes the SDL entries processed by the linear substitution algorithm and skips the 16 reassigned sectors contained in the defective block in the SDL entries. As a mode for switching to PDL items (i.e., G2 list), the P list and the old G1 list are kept intact, the old G2 list and the old SDL item are registered in the new G2 list, and the new SDL is null. However, if the converted G2 list overflows, that is, exceeds the maximum number of items that can be registered in the PDL, the remaining SDL items may be registered in the new SDL.

In the reinitialization mode of clearing the G2 list and the SDL, it is checked whether the PDL item type is "00b" indicating a known P list or "10b" indicating a G1 list which is a defective sector generated during user verification, and checking the defective sector number of the PDL. Is written in ascending order of sector number.

Here, the reinitialization mode of clearing the G2 list and the SDL refers to returning to the recently verified state by initializing the disk using only the P list or removing the reallocated sectors for linear replacement while using the disk. It is a mode that disposes and SDL, and revised PDL includes P list and G1 list. The definition of the three reinitialization modes described above is defined in the DVD specification for Rewritable disc version 2.0.

Check items for checking the SDL structure in the DMA, as shown in Figure 4, SDL identifier, SDL revision counter, the start sector number of the secondary free space (SSA), the total number of logical sectors, DDS / PDL revision counter, Free space pool flags, the number of items in the SDL, the status of the SDL items, and so on.

That is, it is checked whether the SDL identifier is "0002h". To check the items of the SDL revision counter, check whether the N value representing the SDL revision counter and the value k of the increment value of the counter are both "0" in the initialization mode without verification. In the initialization mode with verification, the SDL revision is checked. Checks whether the N value representing the counter is "0" and the value of k representing the increment value of the counter is "1". In the reinitialization mode without verification, the N value representing the SDL revision counter is "previous value" It is checked whether the value of k representing the increment value of the counter is "1", and whether the N value representing the SDL revision counter is "previous value" and the value of k representing the increment value of the counter is "2".

In the initialization mode without verification in order to check the DDS / PDL revision counter item, it is checked whether the M value representing the DDS / PDL revision counter and the value k of the increment value of the counter are both "0". Checks whether the M value representing the DDS / PDL revision counter is "0" and the value of k representing the increment value of the counter is "1". In the reinitialization mode without verification, the M value representing the DDS / PDL revision counter is Check whether this is the "previous value" and the value of k representing the increment value of the counter is "1". In the reinitialization mode with verification, the M value representing the DDS / PDL revision counter is the "previous value" and the value of the counter. It is checked whether the value of k representing the increment value is "2".

In the initialization mode without verification, the starting logical sector number of the SSA and the total number of logical sectors must have the starting logical sector number corresponding to the size of the secondary free space specified at the time of initialization and the total number of logical sectors set correspondingly. Since there is no information about SDL items in the free space pool flag, the number of items in the SDL, the byte position indicating the state of the SDL item and the free space state, the free space pool flag is set to a non-pool situation. The number of items should be recorded as "0", and in most cases, information should not be present in the area indicating the SDL item configuration state and the free space configuration state. Therefore, it is checked whether it is "FFh" indicating unused free space. do. However, if the C-1 disk used for testing is in very bad condition, an SDL entry may occur. Therefore, it is preferable to use a sufficiently good state of the C-1 disc.

In initialization with verification and reinitialization with verification, it is checked whether the starting logical sector number of the SSA and the total number of logical sectors have an appropriate value according to the size of the secondary free space designated by the user at the time of initialization. The free space pool flag indicates a state where the secondary free space is not full, and the number of items in the SDL should be written as "0", which generally indicates no state, and indicates the configuration state and free space state of the SDL item. Since there should not be any information in the area, check whether it is set to "FFh" indicating unused free space.

In the reinitialization mode with the SDL list conversion, it is checked whether the starting logical sector number of the SSA and the total number of logical sectors have an appropriate value according to the size of the secondary free space designated by the user during reinitialization. The free space pool flag indicates that the secondary free space is not full, the number of items in the SDL cannot be converted to a G2 list, and the number of remaining SDL items can be recorded, and the SDL item configuration state is not converted to a G2 list. The SDL item that has failed can be recorded. Since no information should exist in the byte position indicating the configuration state and the free space state of the remaining SDL items, it is checked whether or not "FFh" indicates unused free space.

In the reinitialization mode of clearing the G2 list and the SDL, it is checked whether the starting logical sector number of the SSA and the total number of logical sectors have an appropriate value according to the size of the secondary free space designated by the user during reinitialization. The free space pool flag indicates that the secondary free space is not full, and the number of items in the SDL should be written as "0", which indicates no state, and the byte position indicating the configuration state and free space state of the SDL item. There should be no information in the file, so check if it is set to "FFh" which indicates unused free space.

In the mode for checking whether the additional free space is expanded, it is checked whether the bit position "b1" indicating the additional free space pool flag among the one-byte free space pool flags is "1b" indicating the pool state, and the starting sector of the additional free space. It is checked if the number is allocated in multiples of 32 ECC blocks and is a sector number corresponding to the first sector of the ECC block.

Also, in the bit position " b0 " representing the primary free space full flag among the 1 byte free space flags, if the primary free space is full in the initialization with verification, reinitialization without verification and reinitialization with verification modes. "1b" otherwise represents "0b".

5A to 5D are flowcharts illustrating an embodiment of a method for confirming defect management area information of an optical disk according to the present invention, wherein the DMA information is generated / modified after performing a test mode for an operation in which DMA information is generated / modified. A method is disclosed for checking whether is correctly created / modified.

5A to 5D, it is checked whether the data of four DMA1, DMA2, DMA3, and DMA4 areas coincide with each other in the lead-in area and the lead-out area, respectively (step S101). If any one does not match, DMA verification is stopped (step S102). Here, step S101 checks whether all of the DMA contents shown in FIG. 1 are the same.

If the data stored in the four DMAs in step S101 all match, the identifier (ID) of the DDS is checked (step S103). If the ID of the DDS is not determined, an error occurs in the ID and the process proceeds to step S105 (S104). step).

In step S103, if the ID of the DDS matches the predetermined ID, the disk verification flag according to the initialization mode is checked (step S105). If the disk verification flag for each initialization mode is not set properly, a notification flag error occurs and step S107. Proceed to step S106.

In step S105, if the disk verification flag is properly set according to each initialization mode, the DDS / PDL revision counter according to the initialization mode is checked (step S107), and if it is not set correctly, an error occurs in the DDS / PDL revision counter. Proceed to step S109 (step S108).

If the value of the DDS / PDL revision counter according to each initialization mode is set correctly in step S107, the number of groups for each disk is checked (step S109), and if it is not set correctly, an error occurs in the number of groups. Proceed to step S110.

If the number of groups by disk type is set correctly in step S109, the number of regions by disk is checked (step S111). If the number is not set correctly, an error occurs in the number of regions and the process proceeds to step S113 (step S112). . In one embodiment of the present invention, the type of disk is a DVD-RAM disk, the number of groups is one, and the number of regions is 35.

If the number of regions by disk type is set correctly in step S111, the position of the initial free space (PSA) for each disk is checked (step S113). If it is not set correctly, an error occurs at the PSA location and the process proceeds to step S115. (Step S114).

If the PSA location for each disk type is set correctly in step S113, the ID of the PDL is checked (step S115). If the ID is not set properly, an error occurs in the ID of the PDL, and the process proceeds to step S117 (step S116).

In step S115, the number of items in the PDL is checked (step S117). If it is not set properly, an error occurs in the number of items in the PDL, and the process proceeds to step S119 (step S118).

If the number of items in the PDL is set correctly in step S117, it is checked whether the PDL items are properly set for each PDL item according to the initialization mode (step S119), and if not set correctly, an error occurs in the PDL item, and the process proceeds to step S121. (Step S120).

In step S119, if appropriately set for each PDL item according to the initialization mode, the start logical sector number of each region of the DDS is checked (step S121). If it is not set correctly, an error occurs in the start logical sector number for each region. Proceed to step (step S122).

If the starting logical sector number of each region of the DDS is set correctly in step S121, the position of the first logical sector number (LSN0) is checked (step S123), and if it is not set correctly, an error occurs at the LSN0 position and the step S125. Proceed to step S124.

Here, since the starting logical sector number and the first logical sector number of each region of the DDS are determined according to the number of defects registered in the PDL, the operation is performed after the step S119 of checking the legality of the PDL item.

If the LSN0 location is set correctly in step S123, the SDL ID is checked (step S125), and if not set correctly, an error occurs in the SDL ID, and the process proceeds to step S127 (step S126).

If the SDL ID is set correctly in step S125, the SDL revision counter according to the initialization mode is checked (step S127). If not, the SDL revision counter value is notified and an error occurs in the SDL revision counter value, and the flow proceeds to step S129 (step S128). .

If the SDL revision counter value according to the initialization mode is set correctly in step S127, check the DDS / PDL revision counter according to the initialization mode (step S129), and if it is not set correctly, the DDS / PDL revision counter indicates that an error occurs. Proceed to step S131 (step S130).

If the DDS / PDL revision counter value is set correctly according to the initialization mode in step S129, the number of items in the SDL is checked (step S131). If the value is not set correctly, an error occurs in the number of items in the SDL. Proceed to step (S132).

If the number of items in the SDL is set correctly in step S131, the starting sector number of the SSA is checked (step S133). If the setting is not set correctly, an error occurs in the starting logical sector number of the SSA, and the flow proceeds to step S135. step).

If the starting logical sector number of the SSA is set correctly in step S133, the total number of logical sectors is checked (step S135), and if not set correctly, an error occurs in the total number of logical sectors, and the process proceeds to step S137. (Step S136).

If the total number of logical sectors is set correctly in step S135, the primary free space (PSA) pool flag is checked (step S137), and if it is not set correctly, an error is issued in the free space pool flag. Proceed (step S138).

Herein, in step S137, when the number of PDL items checked in step S117 indicates that the PSA pool is in the state, the PSA pool flag is set to "1b", otherwise, it is checked whether the PSA pool flag is set to "0b".

If the PSA pool flag is set correctly in step S137, the SSA pool flag is checked (step S139). If the PSA pool flag is not set correctly, an error occurs in the free space pool flag and the flow proceeds to step S141 (step S140).

Here, in step S139, if the number of SDL items checked in step S131 is in the SSA pool state, the SSA pool flag is set to "1b", otherwise, it is checked whether the SSA pool flag is set to "0b".

If the full flag is set properly in step S139, it is checked whether the SSA item is properly set for each SDL item according to the initialization mode (step S141), and if it is not set correctly, an error occurs in the SDL item (S142). Step), if it is properly set, the confirmation method of the present invention is terminated.

As described above, the present invention makes it easy to properly generate / modify defect information in the recording / reproducing apparatus by using a test disc having predetermined defect information not related to the actual defect instead of the disc having the actual defect according to the test type. There is an effect that can be confirmed.                     

In addition, the present invention can correctly decode and process defect information in a recording / reproducing apparatus by using a test disc that generates predetermined defect information not related to the actual defect into a mirror file instead of the disc having the actual defect in accordance with the test mode. It is easy to see if there is an effect.

Claims (26)

A method of confirming whether or not the DMA information is properly generated / modified after performing a test mode for an operation in which a DMA information is generated / modified in a recording / reproducing apparatus for recording / reproducing an optical disk having defect management area (DMA) information. In: (a) reading the generated / modified DMA information; And (b) verifying the generated generated / modified DMA information using predetermined reference DMA information for the test mode to provide a verification result. The method of claim 1, wherein the generated / modified DMA information is read in the form of a DMA mirror file. 2. The method of claim 1, wherein the generated / modified DMA information is read directly from the DMA area of the disk used for the test. The G2 list of claim 1, wherein the test mode comprises a first test mode having an initialization mode without verification and an initialization mode having verification, a reinitialization mode having verification, a reinitialization mode having a secondary defect list (SDL) conversion, and a G2 list. And a second test mode having a reinitialization mode for clearing the SDL, a third test mode for checking whether the additional free space is expanded, and a fourth test mode for checking whether the recording is performed by incorrect DMA information. How to make. 5. The method of claim 4, wherein the first test mode uses a first test disc having a known physical defect on a blank disc that contains no information, and wherein the predetermined content on the first test disc is used in the second test mode. A second test disk on which a first mirror file is recorded, in which a DMA is recorded and additional free space is not full, and in the third test mode, a predetermined content of DMA is written and added on the first test disk. Using a third test disk on which a second mirror file with a sufficient SDL defect having a sufficient free space is filled is used, and in the fourth test mode, each region of the predetermined DMA contents on the first test disk is used. A fourth test disc on which a third mirror file with a starting logical sector number Check method comprising for. According to claim 1, wherein step (b), (b1) confirming whether data of a plurality of DMA areas existing on the optical disc coincide with each other. According to claim 1, wherein step (b), (b1) verifying the DDS structure in the DMA. delete delete delete delete The method of claim 7, wherein step (b), (b2) verifying the PDL structure in the DMA. delete delete delete delete delete The method of claim 1, wherein step (b) (b1) confirming the SDL structure in the DMA. The method of claim 18, wherein step (b1) (b1-1) checking the SDL identifier; (b1-2) checking the SDL revision counter value and the increment value of the counter; (b1-3) checking the DDS / PDL revision counter value and the increment value of the counter; And (b1-4) checking a secondary spare space (SSA) logical sector number and the total number of logical sectors; (b1-5) checking the free space pool flag; (b1-6) checking the number of items in the SDL; And (b1-7) A verification method comprising the step of checking the configuration status of the SDL item. delete delete delete delete delete delete delete

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