JPH0729177A - Defect management method of optical disk as well as optical disk recording apparatus and optical disk reproduction apparatus - Google Patents

Abstract

PURPOSE:To manage the optical disk with high reliability by a method wherein an auxiliary defect data management region (DMA) is formed, ineffective information is written in the region, data is then written in a DMA and effective information is written in the auxiliary DMA after it has been judged that the data has been written normally. CONSTITUTION:Inner and outer circumferential control zones 1, 7, a first DMA 2 to a fourth DMA 5, a user region 6 and auxiliary DMAs 8, 9 in which a first auxiliary DMA 10 to a fourth auxiliary DMA 13 are formed are formed in an optical disk. After ineffective information has been written in the DMA 8 and the like, defect management data is written in the DMA 2. When it is judged that the data has been written correctly, effective information is written in the DMA 10. Regarding the DMAs 11 to 13, the same operation is performed. When a power supply is shut off while the DMAs are being written, ineffective information is presented to the auxiliary DMAs, and the defect of the optical disk is managed with high reliability by the DMAs in which the remaining correct identical data which has removed the corresponding DMAs has beeb written.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an optical disk device for performing defect management of an optical disk based on data on the defect management recorded on the optical disk.

[0002]

2. Description of the Related Art Generally, an optical disc has a control zone in which recording and reproducing conditions are recorded and a data zone in which data is recorded and reproduced. The data zone is composed of a user area in which a user records and reproduces data and a defect management area (DMA (Defect Management Area)) in which information on the configuration of the disk and information on defects is recorded. In the DMA, group information regarding division of the user area, information on a position where defect information is recorded (DD
S (Disk Defenition Structure)) and a defect list indicating the position of the defect are recorded. The defect list includes PDL (Primary Defect List) and SDL (Se) depending on the type of defect.
condary Defect List). Normally, the same content data is recorded in a plurality of DMAs in the same target area.

FIG. 6 shows an ECMA (European Computer Ma
FIG. 9 is an explanatory diagram showing a configuration of a recording area of a conventional optical disk, which is presented in the Nufactures Association) standard. In the figure, reference numeral 61 denotes a control zone on the inner circumference side of the optical disk, which is a first DMA 62, a second DMA 63, and a user area 66 (Rewritable Zone) toward the outer circumference side, respectively.
), A third DMA 64, a fourth DMA 65 and a control zone 67 on the outer peripheral side are provided.

Such a DMA is an area fixedly allocated at the stage of manufacturing the optical disc, and data is recorded in the DMA when the optical disc is initialized. And DMA
The data recorded in (1) is reproduced when the optical disk is loaded in the optical disk device, and the user area is recorded and reproduced in accordance with the reproduced data. At this time,
When at least one area of the plurality of DMAs is normally read, it is used as reproduction data, and when all the data of the plurality of DMAs are reproduced, the contents of the plurality of normally read data In some cases, it is confirmed that they are the same, and this is used as the reproduction data.

[0005]

As described above, in the conventional optical disc, in order to reproduce the accurate data recorded in the DMA, the contents of the plurality of DMAs must be the same. However, for example, if the power is cut off during recording of DMA, DMA with different contents will exist in the same target area of the optical disc, and accurate DM
There is a problem that the data of A cannot be reproduced or the optical disk cannot be used.

The present invention has been made in view of the above circumstances, and by recording valid information or invalid information of data relating to defect management in a predetermined area, only a DMA in which data relating to defect management is normally recorded is recorded. An object of the present invention is to provide an optical disk defect management method, an optical disk recording apparatus, and an optical disk reproducing apparatus for reproducing and having high reliability.

[0007]

According to a first aspect of the present invention, there is provided a defect management method for an optical disc, which shows that the data is invalid in the defect management method for the optical disc based on the defect management data recorded on the optical disc. A step of recording invalid information in a predetermined area corresponding to each of a plurality of defect management areas, a step of recording the data in each defect management area, a step of determining whether or not the data is normally recorded, and And recording valid information indicating that the data is valid in an area corresponding to the normally recorded defect management area.

The optical disc defect management method according to a second aspect of the present invention is a method for performing optical disc defect management based on defect management data recorded on an optical disc, in which a predetermined area corresponding to each of a plurality of defect management areas is written in the predetermined area. Prior to reproducing the data of the optical disc on which the valid information indicating that the data is valid or the invalid information indicating that the data is invalid is recorded, the process of determining the area in which the valid information is recorded, and corresponding to this area The data in the defect management area is reproduced.

An optical disk recording apparatus according to a third aspect of the present invention is an optical disk recording apparatus having a control section for recording defect management data in a plurality of defect management areas of an optical disk and performing defect management of the optical disk. Is recorded in a predetermined area corresponding to each of the defect management areas, a means for recording data in each of the defect management areas, and a defect management area in which data is normally recorded. A means for recording valid information indicating that the data is valid is provided in the corresponding predetermined area.

An optical disk reproducing apparatus according to a fourth aspect of the present invention is an optical disk reproducing apparatus having a control section for reproducing data relating to defect management recorded in a plurality of defect management areas of an optical disk and performing defect management of the optical disk. Means for reproducing the information recorded in the predetermined area and determining whether the information is valid information indicating that the data is valid or invalid information indicating that the data is invalid,
Means for reproducing the data in the area in which the valid information is recorded.

[0011]

In the optical disk defect management method of the first invention, after the invalid information is recorded in the predetermined areas corresponding to the respective defect management areas, the valid information is recorded in the predetermined areas corresponding to the defect management areas in which the data is normally recorded. Is recorded, the invalid information is held in a state of being recorded in a predetermined area when it is not recorded normally, for example, when the power is cut off during recording of data. As a result, it is determined that the data is normally recorded in the defect management area corresponding to the area in which the valid information is recorded.

In the optical disc defect management method of the second invention, prior to reproducing the data of the optical disc, the data of the defect management area corresponding to the area in which the valid information indicating that the data is valid is recorded is reproduced. By not reproducing the data in the defect management area corresponding to the area in which the invalid information is recorded, only the normally recorded data is reproduced.

In the optical disk recording apparatus of the third invention, the invalid information is recorded in a predetermined area corresponding to the plurality of defect management areas by the information recording means, and then the data is recorded in each of the defect management areas by the data recording means. To record. Since the effective information is recorded in the predetermined area corresponding to the defect management area in which the data is normally recorded, the data is recorded in the defect management area corresponding to the area in which the effective information is recorded. It can be seen that it was recorded normally.

In the optical disk reproducing apparatus of the fourth invention, the information recorded in the predetermined area is
By determining whether the data is valid information indicating that the data is valid or invalid information indicating that the data is invalid, the data in the area in which the valid information is recorded is reproduced by the means for reproducing the data, and the data is invalid. Data in the defect management area corresponding to the area in which information is recorded is not reproduced. As a result, only the normally recorded data can be reproduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. FIG. 1 is a schematic partial plan view showing the structure of an area for defect management of an optical disc on which recording is performed based on the method of the present invention. In the figure, reference numeral 1 denotes an inner peripheral side control zone in which recording and reproducing conditions of the optical disc are recorded, and the first auxiliary DMA 8, the first DMA 2, the second DMA 3, and the user area 6 (Rewrit
able Zone), third DMA4, fourth DMA5, second
The auxiliary DMA 9 and the control zone 7 on the outer peripheral side are provided. First auxiliary DMA 8 and second auxiliary DM
A9 is an area in which information on the state of the data recorded in the DMA is recorded. If the information is normally recorded, valid information is recorded, and if it is not normal, invalid information is recorded. The above-mentioned data zone is the first and second auxiliary D
It is composed of MAs 8 and 9, first to fourth DMAs, and a user area 4.

FIG. 2 is a schematic partial plan view showing the structure of the auxiliary DMA 8. The auxiliary DMA 8 has a first auxiliary DMA 10 on the inner peripheral side and a second auxiliary D 10 in order toward the outer peripheral side.
MA11, third auxiliary DMA12 and fourth auxiliary DMA
Have twelve. The first auxiliary DMA 10 is the first DM
This is an area for recording valid information or invalid information corresponding to A2, and the second, third, and fourth auxiliary DMAs record valid information or invalid information corresponding to the second, third, and fourth DMAs, respectively. Area. Although not shown, the auxiliary DMA 9 shown in FIG. 1 has the same configuration as the auxiliary DMA 8.
The first auxiliary DMA is provided on the inner peripheral side, and the second auxiliary DMA, the third auxiliary DMA, and the fourth auxiliary DMA are sequentially provided toward the outer peripheral side. As described above, the auxiliary DMA corresponding to the DMA is provided at each of two locations.

An apparatus for recording and reproducing data relating to defect management of the optical disc having the above-mentioned structure will be described below. FIG. 3 is a schematic functional block diagram showing the configuration of an optical disc recording / reproducing apparatus used for carrying out the method of the present invention. Reference numeral 21 in the figure denotes an optical disk recording / reproducing apparatus, a host interface control section 22 for controlling by inputting / outputting signals to / from an external host computer 27, a disk control section 23 for controlling recording / reproducing of data on an optical disk, and a storage device. ROM 24 and RAM 25,
It also has a CPU 26 for controlling them. CP
U26 is a data recording means 26a for recording data relating to defect management in each DMA, an information recording means 26b for recording valid information or invalid information as to whether or not the data is normally recorded in each auxiliary DMA, and each auxiliary DMA. It functions as a discriminating means 26c for discriminating the recorded information and a data reproducing means 26d for reproducing only the DMA data corresponding to the auxiliary DMA in which the valid information is recorded. Recording and reproduction are started.

A method of performing defect management of an optical disk using the optical disk recording / reproducing apparatus having the above-mentioned structure will be described below. FIG. 4 is a flowchart showing a procedure for recording data relating to defect management of an optical disc by the CPU of the optical disc device. First, the invalid information is written in each of the first auxiliary DMAs at the two locations described above (step S
31), and subsequently, invalid information is recorded in the second to fourth auxiliary DMAs (steps S32 to S34). The writing of the invalid information is performed over all the sectors of the optical disc. Next, the data relating to the defect management of the target sector is recorded in the first DMA (step S35), and when it is read and coincides with the recorded data, that is, when it is determined that the data is normally recorded (step S36), Two first auxiliary D
The invalid information of the MA is rewritten into valid information (step S).
37). Further, when it is determined that it is not normal, the first auxiliary DMA is held with invalid information written therein.

Similarly, after recording the data in the second DMA (step S38), it is judged whether or not the data is normally recorded (step S39), and the valid information is recorded in the second auxiliary DMA (step S38). In step S40, the data is also recorded in the third and fourth DMAs (steps S41 to S4).
6). The same information is written in the two auxiliary DMAs, that is, the first to fourth auxiliary DMAs. In this way, the defect management data is recorded in the DMA of the sector. After this, the defect management data is recorded in the DMA of the next sector, but since the invalid information has already been written in the auxiliary DMA in steps S31 to S34, the data is written in the first DMA. After that, the procedure of steps S35 to S46 is repeated.

In the above procedure, steps S31 to S3
4, step S37, step S40, step S4
3, step S46 is a procedure relating to the information recording means 26b, and is step S35, step S38, step S
41 and step S44 are procedures relating to the data recording means 26a.

FIG. 5 is a flow chart showing a procedure for reproducing data relating to defect management of the optical disk by the CPU of the optical disk device. First, the information recorded in the two first auxiliary DMAs is reproduced (step S51),
It is determined whether this information is valid information or invalid information (step S52). If the information is valid information, the data of the first DAM is reproduced (step S53). Then, it is judged whether or not the reproduction is normally performed, and if the reproduction is normal, the reproduction of the data is ended, and if the reproduction is not normal, the information of the second auxiliary DMA is reproduced (step S54). Also, the first auxiliary DMA
If the reproduced information of is invalid information, then the information of the second auxiliary DMA is reproduced (step S54). When different information is recorded in the two first auxiliary DMAs, the information of the second auxiliary DMA is read out or error processing is performed to reproduce the data.

Thereafter, DM is performed until normal data is reproduced.
The data of A is reproduced (steps S55 to S62).
If the data recorded in all the DMAs is not normal, error processing is performed and the reproduction of the data ends (step S63).

In the above procedure, step S51, step S52, step S54, step S55, step S57, step S58, step S60 and step S61 relate to the discriminating means 26d, and step S5.
3, step S56, step S59 and step S6
2 is a procedure relating to the data reproducing means 26c.

By the above method, accurate data can be reproduced without reproducing the data which is not normally recorded in the DMA of the optical disk. Further, by providing two auxiliary DMAs as in the above-mentioned embodiment,
Further, the reliability of information recording can be improved.

In the above-mentioned embodiment, when reproducing the data recorded in the DMA, the system in which the normally reproduced data of one area is used as the reproduced data has been described, but the present invention is not limited to this. Alternatively, a method of confirming that all DMA data are the same and using this as reproduction data may be used. In this case, it is determined whether the DMA data corresponding to all the auxiliary DMAs in which the valid information is written are the same.

Further, although the optical disk recording / reproducing apparatus has been described in the above embodiment, the apparatus may be a recording or reproducing only apparatus.

[0027]

As described above, in the present invention, by recording valid information or invalid information in the auxiliary DMA,
Since it is possible to reproduce only the data of the DMA in which the data relating to the defect management is normally recorded, the present invention has excellent effects such as improving the reliability of the defect management.

[Brief description of drawings]

FIG. 1 is a schematic partial plan view showing a structure of a recording area of an optical disc manufactured according to the method of the present invention.

FIG. 2 is a schematic partial plan view showing the configuration of an auxiliary DMA.

FIG. 3 is a block diagram showing the configuration of an optical disk device used for carrying out the method of the present invention.

FIG. 4 is a flowchart showing a procedure for recording data relating to defect management of an optical disc.

FIG. 5 is a flowchart showing a procedure for reproducing data relating to defect management of an optical disc.

FIG. 6 is an explanatory diagram showing a structure of a recording area of a conventional optical disc.

[Description of Codes] 2 First DMA 3 Second DMA 4 Third DMA 5 Fourth DMA 6 User Area 8, 9 Auxiliary DMA 21 Optical Disc Recording / Reproducing Device 22 Host Interface Control Unit 23 Disc Control Unit 24 ROM 25 RAM 26 CPU 26a Data recording means 26b Information recording means 26c Discriminating means 26d Data reproducing means 27 Host computer

Claims (4)

[Claims] 1. A method of performing defect management of an optical disk based on data relating to defect management recorded in each of a plurality of defect management areas of an optical disk, wherein invalid information indicating that the data is invalid is added to the defect management area. The process of recording in a predetermined area corresponding to each, the process of recording the data in each of the defect management regions, the process of determining whether the data is normally recorded, and the data is normally recorded And a step of recording valid information indicating that the data is valid in a predetermined area corresponding to the defect management area. 2. A method for performing defect management of an optical disk based on data relating to defect management recorded in each of a plurality of defect management areas of an optical disk, wherein the data is valid in a predetermined area corresponding to each of the defect management areas. A step of reproducing the information of the predetermined area before reproducing the data of the optical disc on which the valid information indicating that there is or the invalid information indicating that the information is invalid, and determining the area where the valid information is recorded; And a step of reproducing data in a defect management area corresponding to the area. 3. An optical disk recording apparatus having a control section for recording data relating to defect management in a plurality of defect management areas of an optical disk and performing defect management of the optical disk,
The control unit records invalid information indicating that the data is invalid in a predetermined area corresponding to each of the defect management areas; a unit that records the data in each of the defect management areas; and It is characterized by comprising means for judging whether or not the data is normally recorded, and means for recording valid information indicating that the data is valid in a predetermined area corresponding to the normally recorded defect management area. Optical disc recording device. 4. An optical disk reproducing apparatus having a control section for reproducing defect management data recorded in a plurality of defect management areas of an optical disk and performing defect management of the optical disk, wherein the control section is provided for each of the defect management areas. Means for reproducing valid information indicating that the data is valid or invalid information recorded to be invalid, recorded in a predetermined area corresponding to, and determining an area in which the valid information is recorded,
An optical disk reproducing apparatus, comprising means for reproducing data of a defect management area corresponding to the area.