KR100618995B1 - Method for verifying defect management area inforamtion of disc and test apparatus for performing the same - Google Patents

Abstract

The present invention normally generates / manages defect management area (DMA) information when re-initialization without certification while converting a secondary defect list without verification through a disc recording / reproducing apparatus. A verification method for verifying whether to update and a test apparatus for performing the same are disclosed.

The method according to the invention is performed after (a) performing a re-initialization without certification mode without testing the recording / reproducing apparatus using a test disc having test reference information. Generating test information from the defect management information; (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 for the user to test the DMA generation / update function of the desired disc recording / reproducing apparatus in a short time, and to prevent the economic loss of separately producing and providing a test disc for the manufacturer.

Description

Method for verifying defect management area inforamtion 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.

3 is a diagram illustrating a defect structure of a C-2 test disc type.

4 is an example of a detailed check list for verification included in the verifier shown in FIG. 2.

5 shows a primary defect list (PDL) and a secondary defect list (SDL) of a defect management area of a C-2 disc before reinitialization and a primary defect of a defect management area of a C-2 disc after reinitialization according to the present invention. A block diagram of the relationship between a list and a secondary defect list.

6 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-2 disk

209: Disc drive device for test 215: Verifier

The present invention relates to a device capable of recording / reproducing a disc capable of recording / playback, and in particular, a device capable of recording / reproducing a disc normally generates defect management area information of the disc. It relates to a method of verifying whether or not to update 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 a disk recorder / player (eg DVD-RAM recorder), a filesystem layer, a host interface layer that connects the host computer to a recordable / playback device capable of recording and playback, and a physical This is because recording and decoding of DMA information is performed at or below the physical disk recording / reproducing device layer when the signal 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 is a need for a method capable of confirming whether a disc recording / reproducing apparatus correctly decodes DMA information recorded on a disc, and confirms that the DMA information is correctly generated and updated on the disc.

SUMMARY OF THE INVENTION The present invention has been made in accordance with the above-described requirements, and the defect management is carried out at the time of re-initialization without certification while converting a secondary defect list without verification through a disc recording / reproducing apparatus. An object of the present invention is to provide a verification method for verifying whether region (DMA) information is normally generated / updated.

It is another object of the present invention to convert a secondary defect list without revalidation through a disc recording / reproducing apparatus, and to re-initialize a blank disc and a primary defect list. The present invention provides a verification method for verifying whether or not defect management area information of a disk created by using a test standard defect management area mirror file configured to exist all kinds of defect information is normally generated.

Another object of the present invention is defect management area (DMA) information when re-initialization without certification while converting a secondary defect list without verification through a disc recording / reproducing apparatus. It is to provide a test apparatus for verifying whether or not to generate / update normally.

In order to achieve the objects to be achieved by the present invention, a method according to the present invention is directed to a method for verifying a DMA information generation / update function of a recording / reproducing apparatus capable of recording / reproducing a disc having defect management area (DMA) information. and (a) performing the re-initialization without certification mode using the test disc having the test reference information without verifying the recording / reproducing apparatus, and then testing the test information from the generated defect management information. Generating a; (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 a device for testing a DMA information generation / update function of a device capable of recording / reproducing a disc having defect management area (DMA) information. A test disc having test reference information; A reference disc drive device for generating test information from a defect management area recorded on the test disc after performing a re-initialization without certification mode in the recording / playback apparatus using the test disc; It is preferable to include a verifier that compares the predicted reference information with the test information based on the test reference information and provides 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-2 disc 207, drive to be tested 209, C-2 'disc 211, C-2 '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 made so that artificial physical defects exist for the purpose, and is 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). It provides a DMA mirror file, which is a test criterion information that satisfies a condition that is not filled with the supplementary spare area (hereinafter referred to as SSA).

In particular, the DMA mirror file providing unit 203 provides a DMA mirror file configured such that all kinds of defects exist in the PDL. That is, a P-list consisting of information on defective sectors defined by the disc manufacturer in the PDL, a G1-list consisting of information on defective sectors found during the disc's certification processing period, and without certification. It provides a test reference DMA mirror file containing all G2-lists consisting of information about defective sectors moved from the SDL.

In addition, in order to enhance the test effect, when re-initialization is performed in the disk drive device 209 to be tested, a test reference DMA mirror file including defect information at a special location is provided so as to satisfy a condition where error is most likely to occur. . That is, as shown in FIG. 3, a test reference DMA mirror file including defect information configured to concentrate error sectors around a physical sector where a first logical sector should be located is provided to provide a "DVD Specifications for rewritable disc Part 1 Physical Specifications version 2.0 "Specification satisfies all cases of the algorithm presented.

In addition, the first sector and the last sector of each zone are treated as errors, and the remaining sectors are generated by setting a defective sector so that the sum of the available sectors of each zone is not 16 multiples. Provide a test criteria DMA mirror file configured to: The above-described mirror file is a file having the same contents as the actual file but physically existing at a location different from where the actual file can be located.

In addition, the DMA mirror file providing unit 203 is an entry present in the SDL so that the overflow situation can be considered when re-initializing the SDL without re-validating the disk installed by the test target disk drive 209 to be described later. Provide a reference DMA mirror file whose number exceeds the total number of entries available in the PDL.

The reference disc drive unit 205 is a modified test disc drive unit for testing a 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 replaces the provided test reference DMA mirror file with the C-1 disk 201. And C-2 disc 207 recorded on the back panel. At this time, the 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-2 disc 207 has a physical defect present in the C-1 disc 201, and a disc in which DMA information containing all kinds of defect information is recorded in the PDL regardless of the physical defect. Becomes The C-2 disc 207 is 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 disc 201, and the C-2 disc 207 The DMA information recorded in &quot;) is information known to the user.

In addition, if the C-2 'disk 211 which is re-initialized with SDL conversion is installed, the reference disk drive unit 205 does not perform the verification described later, and the installed C-2' disk 211 is installed. Is directly read, and outputs the read C-2 'disk DMA mirror file 213 as test information. In this case, the test information may be some information existing in the C-2 'disk DMA mirror file 213.

The test target disc drive device 209 is a disc recording / reproducing device capable of recording / reproducing information on a disc which can be recorded again. When the C-2 disk 207 configured as described above is installed, the test target disk drive 209 performs a process of reinitializing the SDL entry without converting it. As a result, the DMA information carried on the C-2 disc 207 is generated / updated.

That is, when the disk drive device 209 to be reinitialized registers the SDL entry to the G2 list of the PDL without testing the C-2 disk 207, the entry carried in the SDL of the C-2 disk 207. Is registered in the PDL as a G2 entry type. Therefore, an entry carried in the SDL of the C-2 disk 207 is present in the PDL of the DMA of the C-2 'disk 211 generated by the disk drive device 209 to be tested. The C-2 'disk 211 in which the DMA information is generated / updated as described above 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 calculates the predicted reference information (or expected value) for the DMA to be obtained when the process under which the disk under test 209 is reinitialized while converting the SDL without verifying the C-2 disk 207 is performed normally. ) To verify the C-2 'disk DMA mirror file 213. The predicted reference information is set in the verifier 215 in consideration of the physical defect information of the test reference DMA mirror file provided from the DMA mirror file providing unit 203 and the pre-provided C-1 disk 201 or shown in FIG. 4. The DMA information table as described above may be provided and used in advance.

4A illustrates a check list that may be included in the verifier 215 for DMA verification, including an error condition of DMA, a DDS / PDL and an SDL update counter, DMA contents items and the like.

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-2 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 disc.

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. 4B 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, and a DDS / PDL update counter. , Number of groups, number of zones, location of primary spare area, location of first logical sector number (Location of LSN0), start logical sector number of each zone Start LSN for each zone 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 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 decided. Then, it is checked whether the starting logical sector number of each region, that is, each starting logical sector number of the second region (Zone 1) to the 35th region (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, and an unused area as shown in FIG. 4C. 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-2 disk 207, " 10b " representing a defective sector G1_list which occurred during user verification, and a G2 list generated by SDL conversion. Is checked, and the defective sector number of the PDL checks whether the sector numbers are written in ascending order in high order.

As described above, when checking the item type of the PDL, checking whether all the item types for P_list, G1_list, and G2_list exist, as shown in FIG. 5, in the old PDL existing in the DMA of the C-2 disk 207. FIG. The P_list 511 and G1_list 513 in 510 are held in the P_list 531 and G1_list 533 of the new PDL 530 present in the DMA of the C-2 'disk 211, and remain in the old PDL ( This is because defect information existing in the G2-list 515 of the 510 and the old SDL 520 is registered in the G2-list 535 of the new PDL 530. Then, it is checked whether an unused PDL area is "FFh".

As shown in FIG. 4D, check items for checking the SDL structure include 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, the free space pool flag checks whether or not the secondary free space is full, and checks whether the number of items in the SDL is set to " 0 " indicating that there is no general. In addition, since information should not exist in the byte position indicating the configuration state of the SDL item and the free space state, it is checked whether it is set to "00h" and "FFh" indicating unused free space. This is a case where the process of reinitializing while converting the SDL list to the G2 list without verification by the test drive disk drive 209 is normally performed, as shown in FIG. 5. This is because all of the defect information registered at 520 is registered in the G2_list 535 of the new PDL 530. At this time, the number of defects existing in the old SDL 520 should be set so as not to exceed the total number of defects that can be registered in the old PDL 510. The total number of defects that can be registered in the PDL 510 is the total number of newly registerable defects among the G2-list 515 existing in the PDL 510. The total number of such defects is for taking into account the defect information registered in advance in the G2-list 515 of the PDL 510.

However, the number of defect information registered in the G2_list 515 of the old PDL 510 of the C-2 disc 207 and the defect information registered in the old SDL 520 is not included in the G2_list 535 of the new PDL 530. When overflowing the allocated area, the remaining defect information registered in the G2_list 535 is registered in the new SDL 540. Therefore, under the condition that the above-mentioned excess condition is to be generated, it is checked whether or not the defect information registered in the old SDL 520 remaining in the configuration state of the SDL item is converted to G2_list. The defect information registered in the old SDL 520 should be set to exceed the total number of defects that can be registered in the old PDL 510 in order to satisfy the condition in which the excess condition will occur.

The verifier 215 compares the reference information set as shown in FIG. 4 with the information present in the C-2 'disk DMA mirror file 213 and reinitializes the disk drive 209 under test while converting the SDL without verifying. At this time, it is verified whether or not the DMA of the C-2 disc 207 is normally generated / updated. The verified result is output as a test result for the mode re-initialized while converting the SDL without verification of the test target disk drive 209. The output method may be implemented to be displayed in a form that can be recognized by the user. To this end, the device according to the present invention can be implemented to further include a separate display means. Accordingly, when the disk drive device under test 209 performs the reinitialization mode while converting the SDL without verifying, whether the DMA of the installed disk is normally decoded and whether the generated defect information is normally generated / updated in the DMA. Will be identified.

Also, the verifier 215 performs the reinitialization mode described above when it is recognized that the spare blocks (ECCs) of the C-2 disk 207 are not used during the SDL conversion period in the disk drive device 209 under test. Output the result considered as an error. The spare block is ....

6 is an operational flow diagram of a verification method according to the present invention, in which the DMA mirror file having the same conditions as in FIG. 2 described above is provided in the C-1 disc 201 having the same conditions as in FIG. To record the C-2 disc 207. Then, in step 602, the C-2 disk 207 is installed in the disk drive device 209 to be tested, and the C-2 disk 207 is reinitialized. At this time, the reinitialization causes the SDL entry to be changed to the PDL entry type without performing certification on the C-2 disc 207. Accordingly, defect information of the SDL is registered as G2-list defect information of the PDL as in the description with reference to FIGS. 4 and 5.

Then, the DMA mirror file recorded on the C-2 'disk 211 reinitialized in step 603 is read out, and the DMA mirror file 213 read out in step 604 is verified. The verification is performed using the reference information (or expected value) as shown in FIG. 4 in the same manner as the verification 215 of FIG. 2 described above. When the verification is completed, the verification result is output in step 605 so that the user can evaluate the DMA generation / update function for the disk drive 209 to be tested.

As described above, the present invention provides a blank disk (C-1 disk) in which no information is recorded and a C-2 disk created using a reference DMA mirror file suitable for a test environment containing all kinds of defect information. After installing on the disk drive (recording / playback device) under test, perform the mode of re-initializing by converting the secondary defect list (SDL) without certification, and then verify the obtained DMA mirror file By testing the DMA creation / update function of the disk drive, it is possible to confirm the DMA creation / update function of the disk drive (disk recording / reproducing device) desired by the user in a short time. In addition, the test disk (C-2 disk) that satisfies the conditions for converting the SDL item to the PDL item can be directly produced by the user using a DMA mirror file, thereby separately manufacturing and providing the test disk described above by the manufacturer. Economic loss caused by

Claims (48)

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) Performing a re-initialization without certification mode without testing the recording / reproducing apparatus using a test disc having test reference information, and then testing information from the defect management information generated. Generating a; (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 according to claim 1 or 2, wherein the test criterion information is configured in the form of a defect management area mirror file (DMA mirror file) configured to have all kinds of defects in a primary defect list (PDL). Way. 4. The method of claim 3, wherein the step (a) performs the reinitialization while converting the secondary defect list SDL recorded on the test disc into a primary defect list PDL included in the test information. Verification method characterized in that. The method of claim 4, wherein the test information is configured in the form of a mirror file. The method of claim 5, wherein the step (b) includes the step of converting the defect information registered in the secondary defect list (SDL) included in the test criterion information into defect information registered in the primary defect list (PDL). When the number of defect information registered in the secondary defect list is configured not to exceed the total number of newly registerable items in the primary defect list (PDL), all the items in the secondary defect list (SDL) are the primary defects. And checking whether it is registered as a G2 list of the list (PDL). 7. The verification method according to claim 5 or 6, wherein the step (b) checks whether the secondary defect list included in the test information is null. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete The method of claim 1, wherein the method is and (c) displaying the verification result as a test result of the DMA generation / update function of the recording / reproducing apparatus. An apparatus for testing the 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 having test reference information; A reference disc drive device for generating test information from a defect management area recorded on the test disc after performing a re-initialization without certification mode in the recording / reproducing apparatus using the test disc ; And a verifier that compares the predicted reference information with the test information based on the test criterion information and provides a verification result of the test information. delete The test apparatus according to claim 25, wherein the test reference information is configured in the form of a defect management area mirror file (DMA mirror file) configured to have all kinds of defects in a primary defect list (PDL). 28. The apparatus of claim 27, wherein the reference disc drive device directly reads the test information from the test disk re-initialized while converting the secondary defect list SDL into the primary defect list PDL in the recording / reproducing apparatus. Test device characterized in that the lifting. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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