KR20040065483A - Method and apparatus for marking recording prevention information on a disc and the disc thereof - Google Patents

Abstract

PURPOSE: A disk is provided to set an area where record prevention information is recorded to a recordable area even though a record prevention function is set by the record prevention information, thereby changing the pre-recorded record prevention information and managing a defect. CONSTITUTION: A lead-in area(LO) is located on an inner circumference side of a disk, and a lead-out area(L1) is located on an outer circumference side of the disk. Data areas are located between the lead-in area(LO) and the lead-out area(L1). The data areas are divided into a spare area and a user data area. The user data area records user data, and the spare area is disposed to compensate for loss of a recording space caused by a defect in the user data area, that is, the spare area is used as an alternative space for newly recording a part having a defect which is generated in data recorded in the user data area.

Description

Method and apparatus for marking recording prevention information on a disc and the disc

The present invention relates to a method of recording write protection information on a disc, and more particularly, to a method of recording write protection information on a recordable disc, an apparatus thereof and a disc.

If only the data can be played back without being recorded on the recordable disc, the write protection information can be recorded on the disc so that the data recorded on the disc can not be deleted due to a user's operation error or the like. However, once the write-protection information is recorded on the disc, data cannot be recorded on the entire disc, and thus there is a problem in that the disc cannot be properly managed for various situations that may occur later. For example, there is a problem that defect management cannot be performed since no further recording is possible in the data area after the write protection information is recorded.

Accordingly, a technical object of the present invention is to provide a method, an apparatus and a disc for recording the write protection information so that the disc can be properly managed even after recording the write protection information.

Another technical problem to be solved by the present invention is to provide a method of recording write protection information, an apparatus thereof, and a disc thereof so as to change already recorded write protection information.

Another technical problem to be solved by the present invention is to provide a method, an apparatus and a disc for recording the write protection information so that defect management can be performed even after the write protection information is recorded.

1 is a block diagram of an apparatus for recording write protection information according to the present invention;

2 is a structural diagram of a disk 100 according to a preferred embodiment of the present invention,

3 is a physical structural diagram of a lead-in area in which write protection information is recorded according to a preferred embodiment of the present invention;

4 is a structural diagram of a disc on which write protection information is recorded according to an embodiment of the present invention;

5 is a structural diagram of a disc on which write protection information is recorded according to another embodiment of the present invention;

6 and 7 illustrate a structure of a disc on which write protection information is recorded, according to another embodiment of the present invention;

8 is a structural diagram of a disc on which write protection information is recorded according to another embodiment of the present invention;

9 and 10 are structural diagrams of a disc on which write protection information is recorded according to another embodiment of the present invention.

The technical problem, according to the present invention, the lead-in area; Data area; And a lead-out area, wherein at least one of the lead-in area and the lead-out area is provided with an area in which write protection information is recorded, and the area in which the write protection information is recorded is recorded by the write protection information. Even if prevention is set, it is achieved by the disc characterized in that it is a recordable area.

A defect management area is provided in at least one of the lead-in area and the lead-out area, at least one spare area is provided in the data area, and even if recording protection is set by the write protection information, the defect management area is provided. At least part of the spare area is preferably a recordable area.

In addition, the technical problem is a first recording layer consisting of a lead-in area, a data area and an outer area; And a second recording layer comprising an outer area, a data area, and a lead-out area, wherein at least one of the lead-in area, the lead-out area, and the outer area is provided with an area in which write protection information is recorded. The area in which the record protection information is recorded is also achieved by the disc characterized in that the recordable area is set even if the record protection is set by the record protection information.

Preferably, the write protection information is recorded in the control data area, and drive and disk information is recorded in the control data area.

At least one of the lead-in area, the lead-out area, and the outer area is provided with a defect management area, and at least one spare area is provided in the data area, even if recording protection is set by the write protection information. At least a part of the defect management area and the spare area is preferably a recordable area.

On the other hand, according to another field of the present invention, the technical problem is a method of recording write protection information on a disc, (a) recording the write protection information in at least one of the lead-in area and the lead-out area of the disc; step; And (b) setting the area in which the record protection information is recorded as a recordable area even if record protection is set by the record protection information.

The method includes (c) at least a part of the defect management area provided in at least one of the lead-in area and the lead-out area and the spare area provided in the data area can be recorded even if recording protection is set by the write protection information. Preferably, the method further includes setting the area.

In addition, the technical problem is a method of recording write protection information on a disc, comprising the steps of: (a) recording the write protection information in at least one of the lead-in area, the lead-out area and the outer area; And (b) setting the area in which the record protection information is recorded as a recordable area even if record protection is set by the record protection information.

The step (a) is preferably a step of recording the write protection information in a control data area, and preferably, the step of recording drive and disk information in the control data area.

The method may further comprise (c) at least a part of the defect management area provided in at least one of the lead-in area, the lead-out area, and the outer area and the spare area provided in the data area. If desired, the method may further include setting a recordable area.

On the other hand, according to another aspect of the present invention, the technical problem, the apparatus for recording the write protection information on the disk, recording / reading unit for recording data to or reading data from the disk; And at least one of the lead-in area and the lead-out area of the disc, wherein the recording / reading unit is controlled so that recording protection information is recorded, and the area where the recording protection information is recorded is set by the recording protection information. Even if it is, it is also achieved by the apparatus characterized by including a control unit which sets a recordable area.

The control unit sets at least a portion of the defect management area provided in at least one of the lead-in area and the lead-out area and the spare area provided in the data area as a recordable area even if recording protection is set by the write protection information. It is desirable to.

In addition, the technical problem is an apparatus for recording write protection information on a disc, comprising: a recording / reading unit for writing data to or reading data from the disc; And control the recording / reading unit to record recording protection information in at least one of the lead-in area, the lead-out area, and the outer area, wherein the area in which the recording protection information is recorded is prevented from being recorded by the recording protection information. Even if it is set, it is also achieved by the apparatus characterized by setting to a recordable area.

The control unit controls the recording / reading unit to record the write protection information in a control data area, and controls the recording / reading unit so that drive and disc information is recorded in the control data area, and the lead-in area and lead-in area. Preferably, at least one of the defect management area provided in at least one of the out area and the outer area and the spare area provided in the data area is set as a recordable area even if recording protection is set by the write preventing information.

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

1 is a block diagram of an apparatus for recording write protection information according to the present invention.

Referring to FIG. 1, the apparatus includes a recording / reading unit 1 and a control unit 2. The recording / reading section 1 records data on the disk 100, which is an information storage medium according to the present embodiment, and reads the recorded data. The control unit 2 records or corrects the write protection information on the disc 100 according to the present invention, and permits or prohibits the recording of data on the disc 100 accordingly when the write protection information is recorded on the disc 100. do. In general, the write protection information is recorded on the disc 100 when data recording is completed on the disc 100, that is, when no further data is to be recorded on the disc 100 (finalizing).

Furthermore, the control unit 2 performs defect management on the data recorded on the disk 100 and records information on the defect on the disk 100. In this embodiment, the control unit 2 performs defect management as necessary even after recording the write prevention information on the disc 100. Defect management means that when a defect occurs in the data, a new portion of the defect is recorded so as to prevent data reproduction from being impossible due to the defect. The defect management may be performed at various levels, but the detailed description thereof will be omitted since the defect management itself is outside the scope of the present invention.

2 shows the structure of a disk 100 according to a preferred embodiment of the present invention.

Referring to FIG. 2A, when the disc 100 is a single recording layer disc having one recording layer L0, it has a disc structure composed of a lead-in area, a data area and a lead-out area. The lead-in area is located on the inner circumferential side of the disk 100 and the lead-out area is located on the outer circumferential side of the disk 100. The data area is located between the lead-in area and the lead-out area. The data area is divided into a spare area and a user data area. The user data area is an area where user data is recorded, and the spare area is a space provided to compensate for the loss of recording space due to a defect in the user data area, that is, a space provided for defect management, and is recorded in the user data area. If a defect occurs in the data, it is used as an alternative space for recording a new portion of the defect.

Referring to FIG. 2B, the structure of the disk 100 is the same as that of FIG. 2A except for the arrangement of the spare regions. The role of each area is also the same as that described with reference to FIG. Spare areas are located at both ends of the data area. The spare area located between the lead-in area and the user data area is called an inner spare area, and the spare area located between the user data area and the lead-out area is called an outer spare area.

Referring to FIG. 2C, when the disc 100 is a dual recording layer disc having two recording layers L0 and L1, the recording layer L0 includes a lead-in area, a data area, and an outer area of the disc 100. The outer peripheral side, the data region, and the lead-out area are sequentially disposed from the inner peripheral side to the outer peripheral side, and the outer region, the data region, and the lead-out area are sequentially arranged from the outer peripheral side of the disc 100 to the inner peripheral side. Unlike the single recording layer disc of Figs. 2A and 2B, the lead-out area is also arranged on the inner circumferential side of the disc 100. Figs. That is, the recording path for recording data is an OTP (Opposite Track Path) from the lead-in area of the recording layer L0 to the area outside of the recording layer L0, and then from the area outside of the recording layer L1 to the lead-out area of the recording layer L1. to be. Spare areas are allocated to recording layers L0 and L1, respectively.

Referring to FIG. 2D, the structure of the disk 100 is the same as that of FIG. 2C except for the arrangement of the spare areas. The role of each area is also the same as that described with reference to FIG. Spare areas are located at both ends of the data areas of each recording layer L0 and L1. The spare area located near the inner circumference of the disk 100 is called an inner spare area, and the spare area located near the outer circumference is called an outer spare area.

The spare area may be arranged by utilizing a separate space obtained by dividing the user area as needed, and the location may be changed in various ways.

3 is a physical structural diagram of a lead-in area in which write protection information is recorded according to a preferred embodiment of the present invention.

Referring to Fig. 3, the lead-in area is divided into a reproduction-only area in which predetermined data is pre-recorded and a recordable area in which data can be recorded. Disc information is recorded in the reproduction-only area during disc mastering in the form of pits or high frequency wobble. Disc information recorded in the read only area includes fixed constant information that should be known for recording or reproducing data on the disc, such as disc diameter, reflectance, recording layer structure, version information, writing strategy, and the like. Data recorded in the reproduction-only area can be reproduced only.

In the recordable area, a defect management area DMA (Control Management Area), a control data area, an OPC (Optimum Power Control) test zone and a buffer area are provided. In the defect management area, when a defect occurs in the data recorded on the disc 100, information for processing and managing the defect is recorded. In the control data area, variable information, such as drive and disc information, to be recorded on the disc or to reproduce the data is recorded. The drive information includes, for example, manufacturer information, manufacturer related information, a manufacturing number, a serial number of the drive, and the like, and the disk information includes, for example, an address of an area in which new OPC data is recorded, and final drive information. The address of the area, the address of the area in which the end user data is recorded, and the like are recorded. The OPC test zone is an area reserved for testing the power of the laser beam for optimal power control. The buffer area is provided for the boundary with the data area in which user data is recorded.

In particular, recording prevention information is recorded in the control data area according to the present invention. The write protection information is information for preventing further data from being recorded on the disc 100. For example, the write protection information may be composed of flag information indicating whether recording protection is set or released for the entire disc, and recordable area information indicating a recordable area without being affected even if recording protection is set. For example, the first 1 bit of the write protection information may indicate whether or not write protection is set or released as flag information, and the remaining bits may each be implemented to indicate whether at least one predetermined area is a recordable area. For example, the second 1 bit may indicate whether the control data area is a recordable area when the write protection is set. As another example, the second 1 bit may indicate whether the control data area is a recordable area when the write protection is set, and the third 1 bit may indicate whether the defect management area is a recordable area. As another example, the third and fourth two bits may indicate whether the defect management area and the spare area are recordable areas. Of course, the write protection information can be expressed by various other bit values and combinations of bit values.

Meanwhile, the control data area in which write protection information is recorded may be provided in other areas except for the data area in which user data is recorded. It may be provided in at least one of the lead-in area, the lead-out area and the outer area. Meanwhile, the lead-out area and the outer area may have a structure substantially the same as that of the lead-in area of FIG. 3.

Fig. 4 shows the structure of a disc on which write protection information is recorded according to an embodiment of the present invention.

Referring to Fig. 4, write protection information is recorded in the control data area of the lead-in area of the single recording layer disc as shown in Figs. 2A or 2B. The grayed out area represents an area in which data can be recorded exceptionally even when the write protection information is recorded so that data can no longer be recorded on the disc. In the present embodiment, the control data area is not affected even if the recording protection information is recorded so that the recording protection is set. That is, data can be recorded in the control data area. Therefore, it is possible to correct or change the write protection information.

Fig. 5 shows the structure of a disc on which write protection information is recorded according to another embodiment of the present invention.

Referring to Fig. 5, write protection information is recorded in the control data area of the lead-in area of the single recording layer disc as shown in Figs. 2A or 2B. The grayed out area represents an area in which data can be recorded exceptionally even when the write protection information is recorded so that data can no longer be recorded on the disc. In this embodiment, even if the recording protection information is recorded and recording protection is set, the area allocated for the recording protection information in the control data area is not affected. That is, data can be recorded in the area allocated for the write protection information. Therefore, it is possible to correct or change the write protection information.

6 and 7 show the structure of a disc on which write protection information is recorded according to another embodiment of the present invention.

6 and 7, recording prevention information is recorded in the control data area of the lead-in area of the single recording layer disc as shown in Figs. 2A or 2B. The grayed out area represents an area in which data can be recorded exceptionally even when the write protection information is recorded so that data can no longer be recorded on the disc. In this embodiment, even if write protection information is recorded and write protection is set, the defect management area DMA, control data area and spare area are not affected. That is, data can be recorded in the defect management area, the control data area and the spare area. Therefore, not only the correction or change of the recording protection information is possible, but also the defect management is possible even after the recording protection information is recorded. For example, if the error correction rate is less than or equal to a predetermined reference value when reproducing data recorded in the user data area, the block is regarded as having a high risk of generating a defect, and the block is rewritten to the spare area in advance, and the block is returned to the defective area. Defect management can be performed in a way that is handled.

However, as in the case of FIG. 7, when at least one spare area is provided, only at least a part of the plurality of spare areas may be set as a recordable area.

Fig. 8 shows the structure of a disc on which write protection information is recorded according to another embodiment of the present invention.

Referring to FIG. 8, (a) shows the first recording layer L0 of the double recording layer disc as shown in FIG. 2 (c) or (d), and (b) shows the second recording layer L1. In this embodiment, write protection information is recorded in the control data area of the lead-in area of the first recording layer. The grayed out area represents an area in which data can be recorded exceptionally even when the write protection information is recorded so that data can no longer be recorded on the disc. In the present embodiment, the control data area is not affected even if the recording protection information is recorded so that the recording protection is set. That is, data can be recorded in the control data area. Therefore, it is possible to correct or change the write protection information.

9 and 10 show the structure of a disc on which write protection information is recorded according to another embodiment of the present invention.

9 and 10, (a) shows the first recording layer L0 of the double recording layer disc as shown in FIG. 2 (c) or (d), and (b) shows the second recording layer L1. In this embodiment, write protection information is recorded in the control data area of the lead-in area of the first recording layer. The grayed out area represents an area in which data can be recorded exceptionally even when the write protection information is recorded so that data can no longer be recorded on the disc. In this embodiment, even if write protection information is recorded and write protection is set, the defect management area DMA, control data area and spare area are not affected. That is, data can be recorded in the defect management area DMA, the control data area and the spare area. Therefore, not only the correction or change of the recording protection information is possible, but also the defect management is possible even after the recording protection information is recorded. For example, if the error correction rate is less than or equal to a predetermined reference value when reproducing data recorded in the user data area, the block is regarded as having a high risk of generating a defect, and the block is rewritten to the spare area in advance, and the block is returned to the defective area. Defect management can be performed in a way that is handled. However, as in the case of FIG. 10, when at least one spare area is provided, only at least a part of the plurality of spare areas may be set as a recordable area.

As described above, according to the present invention, the disc can be properly managed even after recording the write protection information. In other words. Already recorded write protection information can be changed, and defect management can be performed. In particular, in the case of reproducing only after the write protection setting, error correction is performed, but if the place where a high probability of defect is found due to low correction rate is found, defect management can be performed in advance. Further, the present invention is applicable to the case of recording disk information on a bare disk without a cartridge.

Claims (18)

Lead-in area; Data area; And Having a lead-out area, At least one of the lead-in area and the lead-out area is provided with an area in which write protection information is recorded, and the area in which the write protection information is recorded is a recordable area even if write protection is set by the write protection information. Disk. The method of claim 1, At least one of the lead-in area and the lead-out area is provided with a defect management area, At least one spare area is provided in the data area. And at least a part of the defect management area and the spare area is a recordable area even if recording protection is set by the write protection information. A first recording layer consisting of a lead-in area, a data area and an outer area; And And a second recording layer consisting of an outer area, a data area and a lead-out area. At least one of the lead-in area, the lead-out area, and the outer area is provided with an area in which recording protection information is recorded, and the area in which the recording protection information is recorded can be recorded even if recording protection is set by the recording protection information. A disk characterized in that an area. The method according to claim 1 or 3, And the write protection information is recorded in a control data area. The method of claim 4, wherein And drive and disc information are recorded in the control data area. The method of claim 3, At least one of the lead-in area, the lead-out area and the outer area is provided with a defect management area, At least one spare area is provided in the data area. And at least a part of the defect management area and the spare area is a recordable area even if recording protection is set by the write protection information. In the method of recording write protection information on a disc, (a) recording write protection information in at least one of a lead-in area and a lead-out area of the disc; And and (b) setting the area in which the write protection information is recorded as a recordable area even if record protection is set by the write protection information. The method of claim 7, wherein (c) At least a part of the defect management area provided in at least one of the lead-in area and the lead-out area and the spare area provided in the data area are set as a recordable area even if recording protection is set by the write protection information. The method further comprises the step of. In the method of recording write protection information on a disc, (a) recording write protection information in at least one of the lead-in area, the lead-out area and the outer area; And and (b) setting the area in which the write protection information is recorded as a recordable area even if write protection is set by the write protection information. The method according to any one of claims 7 to 9, Step (a) is And recording the write protection information in a control data area. The method of claim 10, Step (a) is And recording drive and disk information in the control data area. The method of claim 9, (c) At least a part of the defect management area provided in at least one of the lead-in area, the lead-out area, and the outer area and the spare area provided in the data area can be recorded even if recording protection is set by the write protection information. And setting the area. An apparatus for recording write protection information on a disc, A recording / reading unit which records data on or reads data from the disk; And The recording / reading unit is controlled to record recording protection information in at least one of the lead-in area and the lead-out area of the disc, and in the area where the recording protection information is recorded, the recording protection is set by the recording protection information. And a control unit for setting the recordable area. The method of claim 13, The control unit sets at least a portion of the defect management area provided in at least one of the lead-in area and the lead-out area and the spare area provided in the data area as a recordable area even if recording protection is set by the write protection information. Device characterized in that. An apparatus for recording write protection information on a disc, A recording / reading unit which records data on or reads data from the disk; And The recording / reading unit is controlled to record recording protection information in at least one of the lead-in area, the lead-out area, and the outer area, and the area in which the recording protection information is recorded is set by the recording protection information. The apparatus is set to a recordable area even if it is. The method according to any one of claims 13 to 15, The control unit And control the recording / reading unit to record the write-protection information in a control data area. The method of claim 16, The control unit And control the recording / reading unit to record drive and disk information in the control data area. The method of claim 15, The control unit may record at least a part of the defect management area provided in at least one of the lead-in area, the lead-out area, and the outer area and the spare area provided in the data area, even if recording protection is set by the write protection information. Apparatus for setting an area.