Method of verifying defect management area information of optical disc upon initialization without certification and test apparatus for performing the same

• US 7,409,599 B2
• Filed: 03/05/2004
• Issued: 08/05/2008
• Est. Priority Date: 04/08/2000
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ko, Jung-wan, Chung, Hyun-kwon
• Primary Examiner(s): Wilson; Yolanda L
• Application Number:
  US10/792,744
• Publication Number:
  US 20040174783A1
• Time in Patent Office: 1,614 Days
• Field of Search: None
• US Class Current: 714/42
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 27/36 Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06

Abstract

A method of verifying defect management area (DMA) information of an optical disc upon initialization without certification, and a test apparatus for performing the same. The method includes generating as test information, defect management information, which is generated after performing initialization without certification on a blank test disc to which no data is written, and verifying the test information using reference test information for the initialization without certification to provide a test result. Accordingly, it can be easily verified that a recording and reproducing apparatus properly translates and processes DMA information which is generated after initialization without certification, using a blank test disc.

Claims

1. A method of verifying whether a recording and reproducing apparatus reads and processes defect management area (DMA) information properly, comprising;

performing initialization without certification on a test disc containing predetermined known physical defect information, to generate the DMA information as test information; and

comparing the test information with reference test information to determine a verification of the recording and reproducing apparatus.

2. The method of claim 1, wherein the comparing the test information with reference test information comprises:

comparing a structure of the generated DMA information of the test information with a structure of DMA information of the reference test information;

comparing a disc definition structure (DDS) in the DMA information of the test information with a structure of a DDS in the DMA information of the reference test information;

comparing a primary defect list (PDL) structure in the DMA information of the test information with a structure of a PDL in the DMA information of the reference test information; and

comparing a secondary defect list (SDL) structure in the DMA of the test information with a structure of an SDL in the DMA information of the reference test information.

3. The method of claim 2, wherein the comparing the DMA structures comprises checking an error condition, DDS/PDL and SDL update counters and contents of the generated DMA information and/or the DMA information of the reference test information.

4. The method of claim 3, wherein:

the checking of the error condition comprises checking whether errors exist in any one of four DMAs, which is the DMA written in four positions on the test disc, two of which are located in a lead-in area and two of which are located in a lead-out area on the test disc;

the checking of the DDS/PDL update counters comprises checking whether values of the DDS/PDL update counters in four DDSs and in four SDLs and increments of the eight DDS/PDL update counters representing a difference in the DDS/PDL update counters before and after the performing of the initialization without certification are all “

0,” and

checking whether the values of the eight DDS/PDL update counters are the same;

the checking of the SDL update counters comprises checking whether values of the SDL update counters in the four SDLs and increments of the four SDL update counters representing a difference in the SDL update counters before and after the performing of the initialization without certification are all “

0” and

checking whether the values of the four SDL update counters are the same; and

the checking of the contents of the DMA comprises checking whether the contents of the four DMAs are the same.

5. The method of claim 2, wherein the comparing of the DDS comprises checking a DDS identifier, a disc certification flag, a DDS/PDL update counter, a number of groups, a number of zones, a location of a primary spare area, a location of a first logical sector number and a start logical sector number for each zone, or combinations thereof within the generated DMA information and/or the DMA information of the reference test information.

6. The method of claim 2, wherein the comparing of the PDL structure comprises checking a PDL identifier, a number of entries in the PDL and an integrity of the PDL entries within the generated DMA information and/or the DMA information of the reference test information.

7. The method of claim 6, wherein:

the checking of the PDL identifier comprises checking whether the PDL identifier is a predetermined value;

the checking of the number of entries comprises checking whether the number of entries in the PDL is set to “

0;

” and

the checking of the integrity of the PDL comprises checking whether the PDL entries do not exist.

8. The method of claim 2, wherein the comparing of the SDL structure comprises checking an SDL identifier, an SDL update counter, a start sector number of a secondary spare area (SSA), a total number of logical sectors, a DDS/PDL update counter, a spare area full flag, a number of entries in the SDL, an integrity of the SOL entries, an un-used area, and reserved areas, or combinations thereof within the generated DMA information and/or the DMA information of the reference test information.

9. The method of claim 8, wherein:

the checking of the SDL identifier comprises checking whether the SDL identifier is a predetermined value;

the checking of the SDL update counter comprises checking whether the SDL update counter value and an increment of the SDL update counter representing a difference in the SDL update counter before and after the performing of the initialization without certification are “

0;

”

the checking of the DDS/PDL update counter comprises checking whether the DDS/PDL update counter value and an increment of the DDS/PDL update counter representing a difference in the DDS/PDL update counter before and after the performing of the initialization without certification are “

0”

the checking of the start sector number of the SSA, the total number of logical sectors, the spare area full flag, the number of the entries of the SDL, and the integrity of the SDL entries comprises checking whether the start sector number of the SSA and the total number of logical sectors are correctly set to values designated during the initialization, whether the spare area full flag is not full, whether the number of entries in the SDL is “

00h,” and

whether information on the SDL entries do not exist, respectively; and

the checking of the un-used area and the reserved areas comprises checking a size of the un-used area of the SDL and whether the un-used area is a predetermined value, and whether the reserved areas are predetermined values.

10. The method of claim 1, wherein the test disc used by the recording and reproducing apparatus is a digital versatile disc-random access memory (DVD-RAM).

11. The method of claim 1, wherein the reference test information is a reference DMA mirror file.

12. The method of claim 11, wherein the reference DMA mirror file contains ideal data without errors.

13. A method of verifying whether a recording and reproducing apparatus reads and processes defect management area (DMA) information properly, comprising:

performing initialization without certification on a test disc containing predetermined known physical defect information, to generate test information; and

comparing the test information with reference test information to determine a verification of the recording and reproducing apparatus,

wherein

the performing of the initialization without certification comprises;

having the recording and reproducing apparatus perform the initialization without certification on the test disc, to generate a disc with the DMA information, and

reading only the DMA information from the disc using a reference drive, to generate a DMA mirror file as the test information, and

the reference test information is a reference DMA mirror file.

14. A method of verifying whether a recording and reproducing apparatus reads and processes defect management area (DMA) information properly, comprising:

performing initialization without certification on a test disc containing predetermined known physical defect information, to generate test information; and

comparing the test information with reference test information to determine a verification of the recording and reproducing apparatus,

wherein the comparing comprises checking a structure of a DMA, a disc definition structure (DDS) of the DMA, a primary defect list (PDL) structure and a secondary list (SDL) structure of the DMA, which form the test information.

15. A method of verifying whether a recording and reproducing apparatus reads and processes defect management area (DMA) information properly, comprising:

performing initialization without certification on a test disc using the reproducing and recording apparatus to generate the DMA information, the test disc containing predetermined known physical defects;

generating test information from the generated DMA information; and

comparing the test information with reference test information to determine a verification of the recording and reproducing apparatus.

16. The method of claim 15, wherein the comparing comprises:

checking a structure of a DMA, a disc definition structure (DDS) of the DMA, a primary defect list (PDL) structure and a secondary list (SDL) structure of the DMA, which form the test information.

17. The method of claim 15, wherein the performing the initialization without certification on the test disc comprises the reproducing and recording apparatus generating the DMA information using the test disc containing the predetermined known physical defects.

18. The method of claim 15, wherein the test information is a DMA mirror file and the reference test information is a reference DMA mirror file.

19. The method of claim 15, wherein the comparing the test information with reference test information comprises:

checking a structure of a DMA, a disc definition structure (DDS) of the DMA, a primary defect list (PDL) structure a secondary list (SDL) structure of the generated DMA information in the generated test information and/or a DMA information of the reference test information.

20. A method of verifying whether Defect Management Area (DMA) information is properly generated by a recording and reproducing apparatus, the method comprising:

performing initialization without certification on a test disc such that the reproducing and recording apparatus generates the DMA information;

generating test information from the generated DMA information; and

comparing the test information with reference test information to determine a verification of the recording and reproducing apparatus.

21. The method of claim 20, wherein:

the DMA information comprises a structure of the DMA, a disc definition structure (DDS) of the DMA, a primary defect list (PDL) and a secondary list (SDL) structure of the DMA, and

the comparing comprises;

checking the structure of the DMA, the disc definition structure (DDS) of the DMA, the primary defect list (PDL) structure and the secondary list structure (SDL) of the DMA, which form the test information.