KR100584546B1 - Method for verifying defect management area information of disc and test apparatus for performing the same - Google Patents

Abstract

The present invention provides a verification method for verifying whether or not defect management area (DMA) information is normally generated / updated when operating a supplementary spare area expansion mode through a disc recording / reproducing apparatus, and a test for performing the same. Start the device.

The method according to the present invention comprises the steps of: (a) expanding additional free space of a test disc in a recording / playback apparatus using a test disc having test reference information, and then generating test information from the test disc; (b) comparing the test information with the test information predicted by the test reference information to provide a verification result for the test information.

Therefore, it is possible to easily verify the DMA generation / update function in accordance with the additional free space expansion of the disc recording / reproducing apparatus.

Description

Method for verifying defect management area information of disc and test apparatus for performing the same

1 is a schematic structural diagram of a rewritable disc.

2 is a functional block diagram of a test apparatus according to the present invention.

3A to 3C are examples of detailed check lists for verification included in the verifier shown in FIG. 2.

4 is an example of an additional free area extension.

5 is a flowchart illustrating the operation of the verification method according to the present invention.

<Description of the symbols for the main parts of the drawings>

201: C-1 disk 203: DMA mirror file provider

205: reference disk drive 207: C-3 disk

209: Test drive disk drive 211: C-3 'disk

213: C-3 'disk DMA mirror file 215: Verifier

The present invention relates to a device capable of recording / reproducing a disc capable of recording / reproducing. In particular, a device capable of recording / reproducing a disc is referred to as a defect management area (hereinafter, referred to as DMA) of the disc. The present invention relates to a method for verifying whether the system is normally generated / updated and a test apparatus for performing the same.

The above-described recordable / reproducible disc is an optical disc for recording and reproducing information by using a property of light such as a laser. For example, DVD-RAM (Digital Versatile Disc Random Access Memory, hereinafter referred to as DVD-RAM) is an example. have. This DVD-RAM is a rewritable disc. According to the "DVD Specifications for rewritable disc Part1 Physical Specifications version 2.0" standard, the above-described DVD-RAM has four DMAs (DMA1, DMA2, DMA3, DMA4) per side of the disk for managing defects on the disk. Done.

Of these four DMAs, DMA1 and DMA2 are located in the lead-in area adjacent to the inner diameter of the disk as shown in FIG. 1, and DMA3 and DMA4 are located at the outer diameter of the disk. It is located in an adjacent lead-out area. Each DMA is followed by reserved sectors.

Each of these DMAs stores a disc definition structure (weakly referred to as DDS), a primary defect list (weakly referred to as PDL) and a secondary defect list (weakly referred to as SDL). . The above-described DDS includes information on the formatted structure of the disc, such as a disc certification flag, a DDS / PLD update counter, and a starting logical sector number for each zone. The PDL contains information on all defective sectors on the disk found during disk initialization. The SDL contains the sector number and the defective block of the first sector of the defective block (1 error-correction code block) that occurred during disk use. And information about the sector number of the first sector of the spare blocks to be replaced and information about the spare area.

As such, the information stored in the DMA can be read and used immediately, but also includes information that changes according to the location and number of defects present on the disk, and through calculation based on the defect information registered in the DMA. Information obtained is also included. The information obtained through the calculation based on the defect information includes the location information of the start sector number or logical sector number 0 of each region.

Four DMAs per disk exist to prevent erroneous defect management due to errors in the DMA information. In addition, since the DMA information is closely related to the physical sector of data, a removable recording medium such as an optical disc has a problem of compatibility between disc recording / reproducing apparatuses when DMA information is incorrectly recorded and decoded. Will occur.

This includes the recording / playback layer of the disk recorder / player (eg DVD-RAM recorder), the filesystem layer, the host interface layer that connects the host computer and the recorder / player capable of recording and playback, and the physical signal. This is because recording and decoding of the DMA information is performed below the physical disk recording / reproducing device layer when the recording is divided into a physical disk recording / reproducing device (or disk driving device) layer and a recording medium layer.

That is, in the actual file system, only the logical sector number is used to transfer user information to be recorded or reproduced to the disc recording / reproducing apparatus, and the disc recording / reproducing apparatus replaces the logical sector number with a physical sector number to The recording or reproducing process is performed, at which time DMA information is used. Therefore, when DMA information is incorrectly decoded or recorded incorrectly by one disc recording / reproducing apparatus, there is a problem that data cannot be read or written correctly by another disc recording / reproducing apparatus.

Therefore, there has been a need for a method capable of accurately decoding DMA information recorded on a disc and confirming whether the disc recording / reproducing apparatus correctly generates / updates DMA information on the disc.

SUMMARY OF THE INVENTION The present invention has been made in accordance with the above-described requirements, and it is to verify whether or not defect management area (DMA) information is normally generated / updated when operating the supplementary spare area expansion mode through a disc recording / reproducing apparatus. The purpose is to provide a verification method.

Another object of the present invention is a disc created by using a blank disc and a defect management area mirror file (DMA Mirror file) as a test standard when operating an additional free space expansion mode through a disc recording / playback apparatus. It is to provide a verification method to verify whether the defect management area information is properly generated / updated.                         

Still another object of the present invention is to provide a test apparatus for confirming whether defect management area information is normally generated / updated when the additional free space expansion mode is operated through the disc recording / reproducing apparatus.

In order to achieve the object of the present invention, the method according to the present invention is directed to a method for verifying the DMA information generation / update function of a recording / reproducing apparatus capable of recording / reproducing a disc having defect management area (DMA) information. (a) expanding additional free space of the test disc in the recording / reproducing apparatus by using the test disc having the test reference information, and then generating test information from the test disc; (b) comparing the test information with the test information predicted by the test reference information and providing the verification result for the test information.

In order to achieve the objects to be achieved by the present invention, an apparatus according to the present invention is for testing a DMA information generation / update function of a recording / reproducing apparatus capable of recording / reproducing a disc having a defect management area (DMA) information. An apparatus, comprising: a test disk on which test reference information is recorded; A reference disc drive device for generating test information from the test disc after performing an additional free space extension mode in the recording / reproducing apparatus by using the test disc; It is preferable to include a verifier for comparing the test information and the test information predicted based on the test reference information to provide a verification result for the test information.

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

FIG. 2 is a functional block diagram of a test apparatus for a disk drive apparatus according to the present invention, and includes a C-1 disk 201, a defect management area (hereinafter, referred to as DMA), and a mirror file providing unit ( 203, reference drive 205, C-3 disk 207, drive to be tested 209, C-3 'disk 211, C-3 'Consists of a disk DMA mirror file 213 and a verifier 215.

The C-1 disc 201 tests a disc drive device capable of recording / reproducing information on a disc that can be recorded again, such as a DVD-RAM (Digital Versatile Disc Random Access Memory). It is a test disc which is manufactured so that a physical defect exists artificially. A blank disc in which no information is recorded. The physical defects present in the C-1 disk 201 are used as information known in advance when testing a desired disk drive. In addition, the C-1 disc 201 is subjected to the DVD-RAM condition of the phase change recording method having a capacity of 4.7 GB (Giga Bytes) specified in the "DVD specification for Rewritable disc version 2.0 standard" for a disc which can be rewritten. The disk is configured to satisfy.

As shown in FIG. 1, the DMA mirror file provider 203 provides information about a disk definition structure (hereinafter, referred to as DDS), a primary defect list (hereinafter referred to as PDL), and a secondary defect list (hereinafter referred to as SDL). And a DMA mirror file, which is a test criterion information that satisfies the condition that a supplementary spare area (hereinafter referred to as SSA) is full.                     

In particular, the provided DMA mirror file has a free flag full flag for the initial spare space (hereinafter abbreviated as PSA) present in the PDL in order to satisfy the above-described condition of full additional free space. Configured to set to '1b', which means full, and set to '1b', which means that the free space pool flag for the Supplementary Spare Area (abbreviated to SSA) exists in the SDL. do.

Primary Spare Area (weakly referred to as PSA) is the free space for the initial defect placed at the very beginning of the disk's user data area when the disk is initialized or reinitialized. The remaining area used is used for linear replacement. Supplementary Spare Area (weakly referred to as SSA) can be allocated additionally during initialization, re-initialization or disk use when the initial free space is insufficient.

In addition, logical sector numbers are not assigned to the PSA and the SSA. The relationship between the logical sector number (hereinafter referred to as LSN) and the actual physical sector number is changed by a defect on the disk. That is, each time a defective sector is generated, the area of use of the PSA is increased by one sector toward the top of the area, so that the logical sector number is changed. The position of the defective sector replaced by this skip substitution is recorded in the PDL.

SSA is an area used for linear replacement that replaces a defect (secondary defect) that occurs while using a disk with a normal block in free space in the unit of an error correction code (ECC) block of the region where an error occurs. . In this linear replacement, the relationship between the LSN on the disk and the actual sector number indicates that if the sector to which the LSN is assigned to the real sector number is defective, that is, if the above-described secondary defect occurs, the sector having the above-described LSN is used for the SSA. Allocate in increments from the back of the available area forward. In other words, it is linearly replaced by a sector in the physical free space of a sector having the same LSN. The defect block position substituted by this linear substitution is recorded in the SDL of the defect management area.

Thus, the test criteria DMA mirror file has a PDL and SDL in which all the test criteria entries for PSA and SSA are recorded, as well as the full flag, as if the PSA and SSA described above were substantially filled and set to the full flag described above. It can be configured as if the entries in the PDL and SDL were not filled but only the full flag was set.

The reference disc drive device 205 is a modified test record / playback device for testing a record / playback device capable of recording / reproducing information on a disc. When the C-1 disk 201 is installed and the test reference DMA mirror file is provided from the DMA mirror file providing unit 203, the reference disk drive unit 205 transfers the provided DMA mirror file to the C-1 disk 201. It is configured to generate the recorded C-3 disc 207. FIG. At this time, the test reference DMA mirror file recorded on the C-1 disk 201 is recorded regardless of the physical defects present in the C-1 disk 201. Accordingly, the C-3 disk 207 is a disk in which the physical defect existing in the C-1 disk 201 is present and the reference DMA mirror file for the above-described test is recorded regardless of the physical defect. The DMA information recorded on this C-3 disc 207 is pre-fixed information known to the user. Then, the C-3 disc 207 is subjected to the DVD-RAM condition of the phase change recording method having a capacity of 4.7 GB (Giga Bytes) specified in the "DVD specification for Rewritable disc version 2.0 standard" for the disc which can be recorded again. The disk is configured to satisfy.

In addition, when the C-3 'disk 211 in which the SSA is expanded to be described later is installed, the reference disk drive 205 directly reads the DMA information recorded on the installed C-3' disk 211, and reads C- And outputs the 3 'disk DMA mirror file 213 as test information. In this case, the test information may be some information existing in the C-3 'disk DMA mirror file 213.

The test target disc drive device 209 is a recording / reproducing device configured to record / reproduce information on a disc that can be recorded again. The test target disk drive 209 performs the SSA extended mode when the C-3 disk 207 configured as described above is installed. Accordingly, the test target disk drive 209 generates / updates the DMA of the C-3 disk 207 so that the C-3 'disk 211 extending the SSA of the C-3 disk 207 is created. The C-3 'disk 211 is a disk configured to satisfy the DVD-RAM condition of the phase change recording method having a capacity of 4.7 GB (Giga Bytes) like the C-1 disk 201.

The C-3 'disk 211 generated by the test target disk drive 209 is installed in the reference disk drive 205 to output test information as described above. The test information output from the reference disk drive 205 is provided to the verifier 215. The providing method may be implemented to be directly provided by the reference disk drive 205.

The verifier 215 uses the C-3 reference information (or expected value) of the DMA that is expected to be changed when the disk drive 209 under test performs the SSA extension to the C-3 disk 207 normally. Verify the disk DMA mirror file 213. The reference information is set in the verifier 215 in consideration of the physical reference information of the test reference DMA mirror file provided from the DMA mirror file providing unit 203 and the C-1 disc 201 provided beforehand, or in FIGS. 3A to 3D. The DMA information table as shown in the figure can be provided in advance and used.

3A is a check list that may be included in the verifier 215 for DMA verification, including an error condition of DMA, a DDS / PDL and SDL update counter, and DMA contents. ) Items, etc.

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 an uncorrected error is found in any one of the DMAs, the verification result may indicate that the disk drive under test 209 fails to create / update the DMA of the C-3 disk 207. So that it is output. The output method can be implemented in the form of displaying the failure so that the user can recognize. If the DMA creation / update fails in this way, the user must retry the test from the beginning using a new test disk.

DDS / PDL and SDL update counter items are tested while re-initializing, DDS / PDL update counter values in four DDS1, DDS2, DDS3 and DDS4 and DDS / PDL update counters in four SDL1, SDL2, SDL3 and SDL4. It is checked whether the "M + k" value representing the value has a value by which "M" is "previous value" and "k" is "1". This is because the DDS / PDL update counter value is incremented by 1 each time the DDS / PDL is updated or rewritten. Then, it is checked whether all eight DDS / PDL update counter values present in DMA1, DMA2, DMA3, and DMA4 are the same.

In addition, the value by "N" being "previous value" and "k" being "1" whose "N + k" value which shows the SDL revision counter value in four places SDL1, SDL2, SDL3, SDL4 Check if it has This is because the SDL update counter value is also incremented by 1 each time the SDL is updated or rewritten. Then, it is checked whether four SDL update counter values are the same.

Also, it is checked whether the DMA contents of the four places (DMA1, DMA2, DMA3, DMA4) are all the same.

FIG. 3B is a check list that may be included in the verifier 215 to verify the DDS structure, and includes a DDS identifier, a disc certification flag, a DDS / PDL update counter, and a number of groups ( Number of Groups, Number of zones, Location of Primary spare area, Location of first logical sector number (Location of LSN0), Location of starting logical sector number of each zone (Start LSN for each zone).

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 1-byte disk verification flags is "0b". At this time, if the value of the bit position b7 is "0b", the formatting is completed, and if "1b", the formatting is in progress, and if "1b", the verifier 215 recognizes that the formatting has failed. Further, it is checked whether all of the reserved bit positions b6 to b2 are "0b" among the disk verification flags, checks whether the value of the bit position b1 indicating the user verification flag is "1b", and indicates the bit position indicating the disk manufacturer verification flag. Check if the value of b0 is "1b".

To check the DDS / PDL update counter, check whether the value of M representing the DDS / PDL update counter is the "previous value" and the value of k representing the increment of the counter is "1", and the number of groups is one. It checks whether it is "0001h" and "0023h" which indicates whether there are 35 regions.

Also, it is checked whether the first sector number of the initial free space is "031000h" and the sector number of the last sector is "0341FFh", and the position of the first logical sector number LSN0 is determined by the number of defects registered in the PDL. Check if it is determined. Then, it is checked whether the starting logical sector number of each region, that is, each starting logical sector number of the second area (Zone 1) to the 35th area (Zone 34) is determined by the number of defects registered in the PDL. Here, the defect registered in the PDL takes into account both the physical defect existing on the C-1 disk 201 and the defect registered in the PDL of the reference DMA mirror file provided by the DMA mirror file providing unit 203. .

Also, it is checked whether all remaining spare areas (byte positions 396 to 2047) of the DDS structure are "00h".

Check items for checking the PDL structure include a PDL identifier, a number of entries in the PDL, an Integrity of PDL entry, an unused area (as shown in FIG. 3C). Un-used area).

That is, it is checked whether the PDL identifier is "0001h", and the number of items in the PDL is a physical defect of the C-1 disk 201 and a defect included in the PDL of the reference DMA mirror file provided from the DMA mirror file provider 203. Indicative of the number, the configuration state of each PDL item checks the item type and defective sector number. Here, the PDL item type is " 00b " representing a known P-list existing in the C-3 disk 207, " 10b " representing a defective sector G1_list generated during user verification, and G2_list generated by SDL conversion. It is checked whether " 11b " and the like are present in the same manner as those present in the test reference DMA mirror file, and the defective sector number of the PDL is checked whether the sector numbers are written in ascending order from high order to low order.

Then, it is checked whether an unused PDL area is "FFh".

As shown in FIG. 3D, the check item for checking the SDL structure includes an SDL identifier, an SDL update counter, a start sector number of SSAs of secondary free space, and a logical sector. Total number of logical sectors, DDS / PDL update counters, Spare area full flag, Number of entries in SDL, Integrity of SDL entries , Unused SDL area, and so on.

That is, to check whether the SDL identifier is "0002h", and to verify the SDL update counter item, whether the N value representing the SDL update counter is "previous value" and the value of k representing the increment value of the counter is "1". Check it. To verify the DDS / PDL update counter item, it is checked whether the M value representing the DDS / PDL update counter is the "previous value" and the k value representing the increment value of the counter is "1".

In addition, it is checked whether the secondary free space of the free space full flag indicates a state in which it is not full. This is because the SSA full flag is set to a value indicating that the SSA full flag is not full as the test target disk drive 209 expands the SSA.

In addition, when the test-based DMA mirror file includes the amount of information that can be further extended for the SSA expansion process, the test target disk drive 209 assists the SSA of the C-3 disk 207 by the set amount. As shown in Fig. 4, since the expansion is performed, the start sector number of the SSA and the total number of logical sectors are checked to check whether the expansion is normally performed.

When the test standard DMA mirror file contains information on the maximum SSA that can be set, the test target disk drive unit 209 calculates an additional settable area by calculating the currently set SSA using the same. The extension will be processed, and information about it will be recorded in the DDS, so check if this extension was successful.                     

On the other hand, since free sectors are not assigned logical sector numbers and free space is not included in the file system space, when the SSA is extended, the information of the file system is also changed. In this case, the file system information is not only recorded in the file system space, but also the file system information itself is often recorded in the first and last portions of the volume space. This is because the position to be recorded can be changed.

Therefore, when testing whether the SSA is properly extended, it is advisable to go through the process of determining whether the file system information is correctly updated.

As such, the verifier 215 verifies whether the information existing in the C-3 'disk DMA mirror file 213 conforms to the set reference information, and the test target disk drive 209 is recorded on the C-3 disk 207. After the SSA extension process according to the DMA decryption, it is verified whether the DMA was generated / updated normally. The verification result may be implemented to be displayed in a form that can be recognized by the user. To this end, the apparatus according to the present invention can be implemented to further include a separate display means. Accordingly, the user may determine whether the disk to be tested 209 normally decrypts, generates, or updates the DMA of the disk when performing the SSA extended mode.

Fig. 5 is an operational flow diagram of the verification method according to the present invention, in which the test reference DMA mirror having the same conditions as in Fig. 2 described above in the C-1 disc 201 having the same conditions as in Fig. 2 described above in step 501. The file is recorded to create a C-3 disc 207.

Next, in step 502, the C-3 disk 207 is installed in the test disk drive 209, and in step 503 the test disk drive 209 performs any SSA extended mode. In step 504, the DMA mirror file recorded on the C-3 'disk 211 in which the SSA is expanded is read as test information, and the read DMA mirror file 213 is verified in step 505. Verification is performed using the same predicted reference information (or expected values) as made in the verifier 215 of FIG. 2 described above. When the verification is completed, the verification result is output in step 506 to allow the user to evaluate the performance of the test target disk drive 209.

According to the present invention, a test disk (C-3 disk) generated by using a blank disk (C-1 disk) on which no information is recorded and a reference DMA mirror file for an additional free space (SSA) expansion test. By performing the additional free space expansion mode of the disk drive under test, the user can easily check whether the target disk drive normally performs DMA decryption / creation / update in the additional free space expansion mode, and the user can test You can create your own discs to avoid the economic loss of the manufacturer and the user caused by the manufacturer to produce and provide test discs separately.

Claims (26)

A method for verifying the DMA information generation / update function of a recording / reproducing apparatus capable of recording / reproducing a disc having defect management area (DMA) information, the method comprising: (a) expanding additional free space of the test disc in the recording / reproducing apparatus by using a test disc having test reference information, and then generating test information from the test disc; (b) comparing the test information with the reference information predicted by the test reference information and providing a verification result for the test information. The method of claim 1, wherein the test criterion information is configured in the form of a mirror file. The verification method as claimed in claim 2, wherein the test criterion information is set to a value indicating that a free space flag is a state in which the secondary free space is full. The method of claim 3, wherein the test information is configured in the form of a mirror file. The verification method as claimed in claim 3, wherein the test information is information directly read from a defect management area of the test disc. The method of claim 5, wherein step (b) comprises: (b1) verifying a structure of a defect management area (DMA) of the test information; (b2) verifying a disk definition structure (DDS) of the test information; (b3) verifying a structure of a primary defect list (PDL) of the test information; (b4) verifying a structure of the secondary defect list (SDL) of the test information. The method of claim 6, wherein step (b1), (b1-1) checking whether an error exists in any one of a total of four DMAs each having two positions in the lead-in area and the lead-out area of the test disk; (b1-2) whether the DDS / PDL update counter value in the four DDSs and the DDS / PDL update counter value in the four SDLs are "previous values", the increment value of the counter is "1", and the DDS / Checking that the PDL update counters are all the same; (b1-3) checking whether the SDL revision counter value in the four SDLs is the "previous value", the increment value of the counter is "1", and the SDL update counters are all the same; And (b1-4) checking whether all four DMA contents are the same. The method of claim 6, wherein step (b2), (b2-1) checking the identifier of the DDS; (b2-2) checking whether the bit value indicating whether the disk verification flag is in progress is "0b" and whether the bit value indicating the disk manufacturer verification and the bit value indicating the user verification is "1b"; (b2-3) checking whether the DDS / PDL update counter value is the "previous value" and the increment value of the counter is "1"; (b2-4) checking the number of groups; (b2-5) checking the number of regions; (b2-6) checking the first sector number of the initial free space and the sector number of the last sector; (b2-7) checking whether the first logical sector number position is determined by the number of defects registered in the PDL; (b2-8) checking whether the starting logical sector number of each region is determined by the number of defects registered in the PDL. The method of claim 6, wherein step (b3), (b3-1) checking the PDL identifier; (b3-2) checking whether the number of items in the PDL matches the number of defects registered in the PDL of the test criterion information; (b3-3) checking whether the defect lists present in the configuration state of the PDL item match the defect lists set in the test criterion information. The method of claim 6, wherein step (b4), (b4-1) checking the SDL identifier; (b4-2) checking whether the SDL update counter value is the "previous value" and the increment value of the counter is "1"; (b4-3) checking whether the DDS / PDL update counter value is a "previous value" and the increment value of the counter is "1"; (b4-4) checking whether the starting logical sector number of the SSA and the total number of logical sectors are set to match the size of the secondary free space designated by the user; And (b4-5) The free space full flag includes a step of checking whether the secondary free space indicates a state in which the second free space is not full. The method of claim 1, wherein the verification method is (c) recording the test criterion information on a blank disk to generate the test disk. 12. The method of claim 11, wherein step (c) records the test criterion information regardless of the physical conditions of the blank disk. The method of claim 1, wherein the step (a) generates the test information such that the test information includes the file system information of the test disk, and the step (b) comprises the file system included in the test information. Verifying that the information has been updated correctly. An apparatus for testing a DMA information generation / update function of a recording / reproducing apparatus capable of recording / reproducing a disc having defect management area (DMA) information, the apparatus comprising: A test disc on which test criterion information is recorded; A reference disc drive device for generating test information from the test disc after performing an additional free space extension mode in the recording / reproducing apparatus by using the test disc; And a verifier that compares the test information with the test information predicted based on the test criterion information and provides a verification result of the test information. The test apparatus according to claim 14, wherein the test criterion information is configured in the form of a mirror file. The test apparatus according to claim 15, wherein the test criterion information is set to a value indicating that the free space flag indicates that the secondary free space (SSA) is full. The test apparatus of claim 16, wherein the test information is configured in the form of a mirror file. The test apparatus according to claim 16, wherein the test information is information extracted from a defect management area of the test disc. 19. The system of claim 18, wherein the verifier verifies a structure of a defect management area (DMA) of the test information, verifies a disk definition structure (DDS) of the test information, and checks a primary defect list (PDL) of the test information. And verify the structure of the secondary defect list (SDL) of the test information. 20. The apparatus of claim 19, wherein the verifier is configured to verify the structure of the defect management area so that any one of a total of four DMAs existing in the lead-in area and the lead-out area of the test disc, respectively, is provided at two locations. Check whether the DDS / PDL update counter value in the four DDSs and the DDS / PDL update counter value in the four SDLs is a "previous value", the increment value of the counter is "1", and the DDS Check whether all of the / PDL update counters are equal, whether the SDL revision counter value in the four SDLs is " previous value ", and whether the increment value of the counter is " 1 " And a test device configured to check whether all four DMA contents are identical. 20. The apparatus of claim 19, wherein the verifier checks the identifier of the DDS to verify the disk definition structure, and if the bit value indicating whether the disk verification flag is in progress is "0b" and the bit value indicating disk manufacturer verification and Check if the bit value representing user verification is "1b", check if the DDS / PDL update counter value is "previous value" and the increment value of the counter is "1", check the number of groups, Check the first sector number of the initial free space and the sector number of the last sector, check whether the first logical sector number position is determined by the number of defects registered in the PDL, and the start logical sector number of each area is And check whether it is determined by the number of defects registered in the PDL. 20. The apparatus of claim 19, wherein the verifier checks a PDL identifier to verify the structure of the primary defect list, checks whether the number of items in the PDL matches the number of defects registered in the PDL of the test criterion information, And checking whether the defect lists present in the configuration state of the PDL item match the defect lists set in the test criterion information. 20. The method of claim 19, wherein the verifier checks the SDL identifier, verifies whether the SDL update counter value is "old value" and the increment value of the counter is "1", to verify the structure of the secondary defect list. Check whether the DDS / PDL update counter value is the "previous value" and the increment value of the counter is "1", and the starting logical sector number and the total number of logical sectors of the SSA are determined by the size of the secondary free space specified by the user. And a free space pool flag is configured to check whether the secondary free space is full. 15. The apparatus of claim 14, wherein the reference disk drive device is configured to generate the test information such that file system information of the test disk in which the additional free area is extended is included in the test information, and the verifier is configured to generate the test information. And verify that the file system information included therein is correctly updated. The test apparatus according to claim 14, wherein the reference disc drive device further comprises a function of generating the test disc by recording the test reference information on a blank disc. The test apparatus according to claim 25, wherein the reference disk drive records the test reference information regardless of the physical conditions of the blank disk.

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