KR20050034355A - Method and apparatus for managing a defective area on optical disc - Google Patents

Abstract

The present invention relates to a method for managing a defective area on a high-speed recordable optical disc, a method for recording onto an optical disc, and a recording / reproducing apparatus, wherein the method for managing a defective area on a recordable optical disc having a defect management area at a maximum allowable speed. While the recording is performed, the presence or absence of a defective area is checked, and when a defective area is generated at the maximum allowable speed, the data recorded in the defective area is replaced with an alternative area in the spare area, and the defect is stored as defect management information. And recording the location information of the area and the location information of the replacement area in the defect management area, which makes it possible to efficiently cope with defect area management at high speed, which is difficult to secure recording characteristics. something to do.

Description

Method and apparatus for managing a defective area on optical disc

The present invention relates to a method for managing a defective area in an optical disc capable of high speed recording, a method for recording onto an optical disc, and a recording / playback apparatus.

As optical recording media, optical disks capable of recording large amounts of data are widely used. Recently, new high-density optical recording media (HD-DVD), for example, Blu-ray Disc, which can record and store high-quality video data and high-quality audio data for a long time, have been developed.

Blu-ray Disc, the next-generation HD-DVD technology, is a next-generation optical recording solution that can store data that significantly surpasses existing DVDs. Recently, world-standard technical specifications have been established.

In this regard, various standards related to Blu-ray Discs have been prepared, followed by a rewritable 1x Blu-ray Disc (BD-RE), followed by a write-once Blu-ray Disc (BD-WO) and a rewritable High-speed Blu-ray Disc (BD). A variety of standards are being prepared for (RE).

In the case of the above BD-RE, only the case where rewritable at 1x speed is discussed, it is necessary to cope with future high-speed (more than 2x) BD-RE, especially in case of BD-WO which is recently discussed. Standardization is also in progress at the same time, it is urgently required to prepare an effective defect area management plan corresponding to high speed in the high-density optical disk, in particular, it must be provided as standardized information to ensure mutual compatibility.

The present invention was created in view of the above-mentioned situation and intends to propose a new method for managing a defective area as standardized information corresponding to high speed, in particular, to determine a recording speed for performing defective area management, and to determine the determined recording speed. The purpose of performing defect area management and recording is to have the following technical problems.

To provide an optical disc having information on the allowable recording speed, and a new defect area management method using the maximum allowable speed when recording on the optical disk.

Another object of the present invention is to provide a recording method and a recording / reproducing apparatus for recording real data onto an optical disc using the defect area management method described above.

In the defect area management method according to the present invention for achieving the above technical problem, in the defect area management method of a recordable optical disc having a defect management area, whether or not a defect area is generated while recording is performed at the maximum allowable speed. If a defective area is generated at the maximum allowable speed, the data recorded in the defective area is replaced with the replacement area in the spare area, and the location information of the defective area and the location of the replacement area are recorded as defect management information. And recording the information in the defect management area.

In addition, the optical disc according to the present invention is characterized in that, if a defect area is generated while recording is performed at an allowable recording speed and the type of recording related information WS applied to each recording speed, and at the maximum allowable speed, And a replacement area for replacing and recording data recorded in the defect area, and a defect management area for recording the location information of the defect area and the location information of the replacement area.

In addition, the optical disk recording method according to the present invention, when the optical disk is loaded, confirming the maximum recording speed allowed by the loaded optical disk, and from this determine the maximum speed for recording on the optical disk, and receives a recording command And when a defective area is generated while recording at the determined maximum speed, replacing the data recorded in the defective area with a replacement area, and recording the location information of the defective area and the location information of the replacement area in the optical disc. And recording the defect management information in the defect management area.

       In addition, the recording and reproducing apparatus of the optical disc according to the present invention includes a control unit which transmits a recording command to a specific area, confirms the maximum recording speed allowed by the optical disc, and determines the maximum speed for recording on the optical disc therefrom. If a defective area is generated while performing recording at the determined maximum speed, the data recorded in the defective area is replaced with the replacement area for recording, and the location information of the defective area and the location information of the replacement area are recorded in the defect management area of the optical disc. And a recording and reproducing section for recording as defect management information.

Hereinafter, a defect area management method, a recording method and a recording / reproducing apparatus in a high speed recordable optical disc according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, an optical disc will be described by taking a case of a recordable Blu-ray disc (BD-RE / BD-WO) as an example.

In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, The present invention is to be understood as the meaning of terms rather than names.

1 shows a structure of an optical disk according to the present invention, which is a single layer structure in which one recording layer is used. An optical disk to which the present invention is applied is sufficient to be a recordable optical disk, and can be rewritable or used once. It will be applicable regardless of whether it is a recordable optical disc.

In FIG. 1, the inner circumference and outer circumference area of the disk are provided with a lead-in and lead-out area as a management area, and in particular, the inner circumference area of the disc is a pre-recorded area and a rewritable or write-once area. Are separated. The pre-recorded area is an area that is already recorded at the time of the disc creation and is no longer recordable by the user or the system. In particular, the pre-recorded area is called PIC (Permanent Information & Control data) in BD-RE / WO. Disc information (also referred to as "DI") is recorded in the PIC area as information necessary for recording and management on a disc.

In the data area, a user data area in which user's actual data is recorded and spare areas ISA and OSA for replacing a defective area are provided. Therefore, if a defective area occurs in the user data area (A, B cluster), it is recorded and replaced by the replacement area (a, b cluster) in the spare area, respectively, and the defective area (A, B) and the replacement area (a, b) Position information is recorded in a defect management area (DMA) as a defect list (DFL) and managed.

The optical disc of the present invention also includes recording speed information allowed by the disk in the pre-recorded area PIC and recording related information (Write Strategy; hereinafter referred to as "WS") applied to each recording speed information. The method of recording the disk information DI in the PIC area will be described in detail with reference to FIGS. 2 and 3 as follows.

FIG. 2 schematically shows the structure of the PIC region in the disk structure of the present invention as shown in FIG. 1. In particular, in the case of BD-RE / WO, the PIC region is recorded as a biphase high frequency modulated signal. The high frequency modulated signal of the corresponding region is reproduced according to a specific reproduction method and information is obtained from the same. Fig. 2 briefly shows the rearranged form of information when all the information in the high frequency modulated PIC area is acquired. The minimum recording unit in the BD-RE / WO is represented by " 1 cluster " 544 clusters are gathered to form a fragment as one upper recording unit, and a total of five fragments are gathered to form a PIC region. The disc information is recorded in the head cluster of the first fragment IF0. The disc information is recorded in plural numbers per recordable layer and permissible recording speed of the optical disc, and one disc information is 112 bytes ( bytes). The disk information composed of 112 bytes is also called a disk information frame (DI frame). In addition, by repeatedly recording the same disk information in the head cluster of the remaining fragments, it is possible to cope with the loss of the disk information.

In addition, although the recording related information WS is recorded in each of the disc information, various kinds of recording related information WS are predetermined as a standard, and any one of them is selectively recorded.

In the description related to the recording related information WS, in general, a recordable optical disc performs recording by changing a medium characteristic of the recording layer by scanning a laser beam through a pickup (Figs. 8 and 11) to the recording layer in the optical disc. Done. Therefore, it is necessary to determine how much the intensity (recording power) of the laser beam, how long to scan the recording power, and the like. The various recording-related information determined as described above is generally referred to as "Write Strategy (WS)". "Write Strategy (WS) parameters" may also be referred to as "Write Strategy (WS) parameters."

In addition, the recording related information (WS) can be recorded in various ways. In particular, as the disk becomes denser / higher in speed, not only the characteristics of the recording layer but also the recording speed (in other words, the number of revolutions of the disk) are more precise. As required, as the recording speed becomes higher, the various recording related information WS required may be, for example, as follows.

First, there is a method of having one recording pulse less than the recording mark size (n) formed in the recording layer medium (also called "(n-1) WS"), and the second is a recording mark There may be a method of having a recording pulse of half the size n (also referred to as "n / 2 WS"). In addition to the above, new record related information (WS) for high speed recording has been continuously developed, and different types of record related information (WS) have different parameters applied to the record related information (WS). In the case where there are various types of recording related information WS as described above, the disc maker tests the recording power according to the type of the selected recording related information WS, and the result is recorded in the disc information. WS) to record them as parameters.

Therefore, in the optical disc of the present invention, various kinds of recording related information WS according to high speed are selectively recorded in the disk information, and the recording / reproducing apparatus (Fig. 8) refers to the recording related information WS recorded in the optical disk. To perform the record.

3 shows an example of recording the disc information of the present invention.

First, the order is determined as a serial number for each piece of disc information, and this is recorded as 1 byte. For example, this information is recorded in the fifth byte of the disk information and is named "DI frame sequence number in DI block" field.

In addition, in a specific area (Nth byte) in the disc information, the recording speed information that the disc can accept is recorded, which is named as the "Writing speed flag" field. For example, in the Nth byte to which one byte is allocated, one bit expresses whether or not the disk can allow a specific recording speed for eight recording speeds. That is, if the bit value is "0b" in all the bits, it means that the corresponding write speed is not allowed (supported), and if "1b" is defined, it means that the write speed is allowed (supported). Therefore, each bit b0 to b7 in one byte becomes flag information indicating whether or not to allow a specific recording speed.

In the above, as the recording speed, 1x (1X) and 2x (2X) apply a predetermined recording speed as the speed used in almost all disks, but for the third and subsequent recording speeds, the recording speed determined by the standard can be used. For example, the 3rd recording speed (3rd X) is 4 times speed, the 4th recording speed (4th X) is 6 times speed, the 5th recording speed (5th X) is 8 times speed, the 6th recording speed (6th speed). X) may be determined as 12 times speed, 7th recording speed (7th X) at 14 times speed, 8th recording speed (8th X) at 16 times speed, or the like.

Thus, for example, if the disc is only acceptable for 1X (1X), the Nth byte will be written as "0000 0001", and if for 4 writes (1X, 2X, 3rd X, 4th X) If acceptable, the Nth byte will be written as "0000 1111". In this case, if the third recording speed (3rd X) is 4 times and the fourth recording speed (4th X) is 6 times, the maximum recording speed allowed by the corresponding optical disc is 6 times, which is the defect management of the present invention to be described later. This is the information used for the method.

In addition, in another specific area (L th byte) of the disc information, recording layer information indicating the number of recording layers existing in the disc is recorded, which is named as the "Number of Recording Layer" field. For example, in the same area in which 1 byte is allocated, a value representing the number of recording layers can be expressed in binary. If the recording layer is a single layer as shown in Fig. 1, the L-th byte is " 0000 0001 ". In the case of a dual layer having two recording layers, the L th byte will be recorded as "0000 0010", and if there are four recording layers, the L th byte will be recorded as "0000 0100".

In addition, in another specific area (M-th byte) in the disc information, identification information for distinguishing the type of recording-related information (WS) recorded in the P-111th byte in the disc information is recorded, which is referred to as "Write Strategy (WS)". Type "field. That is, the disc information of the present invention records only one recording related information (WS) for a specific recording speed and a specific recording layer, and the recording related information (WS) is selected by the disc producer from among various standardized types. (Optional) was made selectable. Therefore, if the disc information is the first type of recording related information (WS-1), it is recorded as "0000 0001" in the Mth byte, and if the disc information is the second type of recording related information (WS-2), M The first byte is recorded as " 0000 0010 ", and the actual recording related information WS is recorded in the P-111th bytes, but is recorded as a value linked to the recording related information WS type determined in the Mth byte. In addition, the type of the recording related information WS through the M-th byte may be optional in all the disc information, but the disc information at the 1x speed that is expected to be supported by all the recording and reproducing apparatuses (Fig. 8). It would also be possible to mandatory to apply one type of record-related information (WS) specified in the standard.

The present invention is characterized in that the recording speed information allowed by the optical disk and the recording related information WS for each recording speed information are recorded in a standardized manner in the optical disk, and the information recorded in the optical disk is utilized for defect area management. 3 shows disc information DI as an example for explaining the recording speed information recorded in the optical disk of the present invention and the recording related information WS for each recording speed information. It will be apparent that the recording speed information allowed by the optical disc and the recording related information WS for each recording speed information can be recorded in various ways.

 Fig. 4 shows a basic method of performing defect area management in a high-speed recordable optical disc to which the present invention is applied. First, the meanings of "defect area" and "defect area management" used in the present invention will be explained.

In the present invention, the term "defective area" refers to an area in which a particular area of a disk has a high risk of developing into an uncorrectable area in the future due to a specific cause. The term " manage defect area " means to designate a defective area before the specific area in which the data is recorded or to be recorded becomes an uncorrectable area. Means a management method to further improve the reliability of the data recorded in the disk by transferring data to the replacement area in the disk. In particular, in the case of recording or reproducing information in which data itself has an important meaning, such as PC data, management of a defective area will be more necessary.

Therefore, it may be an important issue to establish a criterion for what to consider as a "fault area", and this criterion is applied to a "fault area" by applying rather high standards to reduce the load on the system designed by the designer of the system. "In order to reduce the occurrence of" (to prevent frequent replacement records), on the contrary, in order to ensure the reliability of the data, it is possible to designate a lot of "fault areas" and to replace the data stably with the replacement areas. You may have to.

The criterion for determining the defective area is different from each other in various standardized discs, and it is generally based on the amount of errors occurring in the recording unit. For example, if more than a certain number of errors occur, it is determined as a "fault area" and data is written to the replacement area. If no error is more than a certain number, an error correction code (ECC) in the system is not determined as a "fault area". Error correction code is used to correct the error. Therefore, the system designer defines the criteria for the "a certain number of errors in the recording unit" to be applied in the system in consideration of the optimal system and data protection. It is possible to decide whether to judge the area.

In addition, the occurrence of such an error may occur differently depending on the type of recording speed and the recording related information WS applied for recording, so that a defective area in the disc may be affected by the specific recording speed and specific recording related information WS. Although it is determined that it is a defective area, other recording speeds and other recording related information WS also occur when it is not determined as a defective area.

In particular, the optical disc to which the present invention is applied will have more difficulty in determining as a defective area as the types of allowable recording speed and recording related information (WS) are diversified.

Therefore, in the present invention, in order to more reliably protect the data recorded in the optical disc, it is characterized in that the defective area is managed while performing recording at a high speed in which the most defective area generally occurs. When recording at high speed, the area detected as the defective area is recorded in advance as an alternative area in the spare area so that the data recorded on the disc can be protected by the defect area management method in advance.

Referring to Fig. 4, a description will be given of a method of performing defect area management while recording / reproducing apparatus (Fig. 8) performs recording at the maximum allowable speed. First, disc information is read from a PIC area in a loaded optical disc, and the corresponding optical disc is read. The maximum recording speed allowed is checked, and the maximum recording speed N to be finally recorded is determined by comparing with the maximum recording speed allowed by the recording / reproducing apparatus (Fig. 8).

That is, the recording / playback apparatus (Fig. 8) can also be designed with various functions according to the design maker, for example, it may support only the lowest speed (eg, 1x speed), and supports up to the maximum speed allowed. There may be cases. Therefore, from the maximum recording speed allowed by the loaded optical disc and the recording / reproducing apparatus, the maximum speed N to be recorded and verified on the optical disc is determined, and the recording is performed using the determined maximum speed N. Defect area management is performed. That is, the recording and reproducing apparatus (FIG. 8) checks whether a defective area is generated by performing verification after recording for each specific verify unit while recording at the maximum speed N. In the case of FIG. 4 illustrates an example in which a defect area is not detected in the verification unit 1 through the verification, but two clusters A and B are detected in the verification unit 2 as the defective area.

Hereinafter, a method of determining a maximum speed to perform the defect area management and a method of managing a defect area detected by recording at the maximum speed will be described in detail with reference to FIGS. 5 to 7.

5 shows as a table a method of determining the maximum double speed applied for the defect area management of the present invention. The recording / reproducing apparatus (Fig. 8) reads the maximum recording speed allowed by the optical disc from the disc information in the optical disc when the specific optical disc is loaded while the recording / reproducing apparatus (Fig. 8) knows its allowable maximum recording speed. The lowest recording speed among the maximum recording speeds and the maximum recording speeds allowed by the optical disc is determined as the recording speed (N) for defect area management, and recording is performed. The determined recording speed N will eventually be the maximum allowable speed N.

For example, in FIG. 5, when the optical disc is loaded in the recording / reproducing apparatus having a maximum recording speed of 4 times (max 4X), if the maximum recording speed allowed by the loaded optical disc is 1 times, the defect is defective. The recording speed N for the area management is determined as 1x, and if the maximum recording speed allowed by the loaded optical disc is 2x, the recording speed N for the defect area management is determined as 2x, and the loaded optical disc If the maximum recording speed allowed is 4x, the recording speed N for defect area management is determined as 4x. If the maximum recording speed allowed by the loaded optical disc is 8x, the recording speed N for defect area management is The decision is made at four times the speed and the record will be performed. Detecting the defect area at the maximum allowable recording speed N determined as described above will make managing the defect area at a higher speed easier.

6 and 7 respectively show a method of recording a defect area detected as defect management information in the defect management area while performing recording at the maximum allowable speed as described above.

First, the general method of recording the position information of the defective area and the replacement area in the defect management area as a defect list (DFL) will be described. The DFL is composed of a defect entry (hereinafter referred to as an "entry"). (entry) records the position information of the defective area and the replacement area corresponding to each defective area in 8 bytes.

An 8-byte entry is provided with fields (status1, status2) for recording identification information identifying the type of defective area, and generally includes a " Defective cluster first PSN " field for recording location information determined as a defective area; A " Replacement cluster first PSN " field for recording the position information of the area where the defective area is replaced is provided. However, the field name is used only for the same field name for compatibility with the existing BD-RE, the content recorded in the field may be different from the general case, will be described in detail with reference to embodiments of the present invention. .

Fig. 6 shows the most general method of creating an entry in the defect list DFL. When two defect areas are detected in the user data area while performing recording at the maximum speed allowable by the present invention, the " The location information (A address, B address) of the defective area is recorded in the Defective cluster first PSN "field, respectively, and the location information (a address, b address) of the replacement area is recorded in the" Replacement cluster first PSN "field. The entry type (entry type) is recorded in the status1 "field, and in general, it will be recorded as" 0000 "(RAD type: Re-Allocation defective) in case of replacement of a normal defective area. Also, the "status2" field is set to "0000" as the unused area.

The defect entry creation method of FIG. 6 is the same as the conventional method of recording the defect management information, and the same applies to the defect area management using the maximum allowable speed of the present invention. To show.

Fig. 7 illustrates the present invention-specific method of creating an entry in a defect list (DFL), in which the fields in the entry are the same as in Fig. 6, but the recording speed value at the time when a defective area is detected in the " status2 " field. It characterized in that recording.

That is, from the recording speed allowed by the specific recording / reproducing apparatus Y and the loaded disc, if the maximum allowable speed is determined as 4 times speed, the defective area A and B clusters are detected and replaced while performing recording at the determined speed 4 times. Alternate recording is done in the regions a and b clusters, respectively. Therefore, the location information (A address, B address) of the defective area is recorded in the "Defective cluster first PSN" field of the entry, respectively, and the location information (a address, b address) of the replacement area is recorded in the "Replacement cluster first PSN" field, respectively. The entry type is recorded in the "status1" field, and the corresponding maximum speed value N1 is recorded in the "status2" field. In the case of the above example, since the 4x speed is the maximum speed at which recording is performed, the value "0100" will be recorded in the "status2" field.

In addition, if the same disc is later loaded into another recording and reproducing apparatus Z, recording is performed, and if the maximum allowable speed N2 is determined to be 2 times in the recording and reproducing apparatus Z, recording is performed at twice the speed. As a result, the defective area C and D clusters are detected and recorded in the replacement area c and d clusters, respectively. Therefore, when the entry is made, the entry made after the previously created entry (entry for the defect areas A and B), and similarly, the position information (C address, D address) of the defect area is recorded in the "Defective cluster first PSN" field, respectively. In the "Replacement cluster first PSN" field, record the location information (c address, d address) of the replacement area, and record the entry type in the "status1" field, but the corresponding maximum speed value in the "status2" field. Record it. In this case, since the double speed is the maximum speed at which recording is performed, the value "0010" will be recorded in the "status2" field.

In the case of Fig. 7, each recording and reproducing apparatus Y and Z has a recording speed for performing defective area management at a lower speed among the maximum recording speed allowed by the loaded optical disc and the maximum recording speed allowed by the recording and playback device itself. If a defective area is detected during recording at the recording speed, the replacement area is recorded as an alternative area. When recording defect management information in the defect management area, the recording speed value at the time of detecting the defective area is recorded. The optical disk can provide information on at what recording speed the defective area is detected, which can be utilized as valid information for managing the defective area.

 Fig. 8 relates to a recording / playback apparatus for an optical disk to which the present invention is applied, and the recording / playback apparatus includes a recording / playback section 10 for performing recording / reproducing on an optical disk and a control section 20 for controlling it. The control unit 20 issues a recording or reproducing command to the recording / reproducing section 10 to the specific area, and the recording / reproducing section 10 performs recording / reproducing to the specific area according to the command of the control section 20. FIG. Specifically, the recording and playback section 10 includes an interface section 12 for communicating with the outside, a pickup section 11 for directly recording or reproducing data on an optical disc, and a playback signal received from the pickup section. A data-processor 13 for restoring a signal value or modulating a signal to be recorded into a signal recorded on an optical disk, and transferring the data-processor 13 to pick up a signal accurately from the optical disk or to accurately record a signal on the optical disk. A servo unit 14 for controlling the unit 11, a memory 15 for temporarily storing various information and data including management information, and a microcomputer 16 for controlling the components of the recording / reproducing unit. have.

Referring to the recording process of the optical disc according to the present invention in detail, first, when the optical disc 30 is loaded into the recording / playback apparatus, all management information in the optical disc is read out and temporarily stored in the memory 15 in the recording / reproducing section, and these management information is It is utilized during recording and reproducing on the optical disc. In particular, the management information stored in the memory also includes recording speed information allowed by the optical disc recorded in the disc information DI of the present invention and recording related information WS for each recording speed. The microcomputer 16 of the recording / playback section 10 confirms the maximum recording speed among the recording speeds allowed by the loaded optical disc, and compares the recording speed with the maximum recording speed allowed by the recording / reproducing device itself. In order to determine the maximum speed to be applied for the purpose, and to perform the future recording using the record-related information (WS) corresponding to the determined maximum speed.

The control unit 20 transmits the recording and reproducing unit 10 together with the data to record the position information of the area to be recorded, as a recording command, if the recording is to be recorded in a specific area in the optical disc. After receiving the recording command, the microcomputer 16 in the recording / reproducing section applies the predetermined allowable maximum speed to record and verify the defective area detected by the controller 20 by performing the recording and verification process on the specific area desired. Defect area management is performed to replace the replacement area.

The defect management information generated by performing the defect area management is recorded in the defect management area of the optical disc as a defect list (DFL), and the maximum speed value applied for recording is recorded in the defect list (DFL), so that in the future The optical disc can be utilized for recording and reproducing.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

The present invention records the recording speed information allowable on an optical disc in a high speed recordable optical disc, and uses the recording speed information recorded in the optical disc to perform recording and verification at the maximum speed allowed by the recording / reproducing apparatus, thereby securing recording characteristics. This makes it possible to efficiently cope with defect area management at high speed, which is difficult to operate.

Fig. 1 briefly shows the structure of a recordable optical disc of the present invention,

Fig. 2 shows a part of the management area in which the disc information is recorded in the optical disc of the present invention, and briefly shows the form in which the disc information is recorded in the corresponding area.

3 shows an embodiment of recording disc information in an optical disc of the present invention;

4 conceptually illustrates a defect area management method of the present invention;

5 shows in a table a method for determining the maximum allowable speed applied to the present invention,

6 shows an example of recording defect management information by one method of defect area management according to the present invention;

7 shows another example of recording defect management information by one method of defect area management according to the present invention;

Fig. 8 shows a recording / playback apparatus applied to defect area management corresponding to the high speed of the present invention.

-Description of the main parts in the drawing-

10: recording and playback section 20: control section

16: micom 15: memory

30: optical disc

Claims (14)

A defect area management method of a recordable optical disc having a defect management area, comprising: Check the occurrence of defect area while recording at the maximum allowable speed, When a defective area is generated at the maximum allowable speed, the data recorded in the defective area is replaced with an alternative area in the spare area and recorded. And recording position information of the defect area and position information of the replacement area in the defect management area as defect management information. The method of claim 1, And the maximum allowable speed means a lower speed among the maximum speed allowed by the optical disc and the maximum speed allowed by the recording / reproducing means for performing recording and reproduction. The method of claim 1, And the maximum speed value is recorded in the defect management information. The method of claim 1, And a type of recording-related information (WS) to be applied for each double speed in the optical disc. An area in which allowable recording speeds and types of recording related information (WS) applied to each recording speed are recorded; If a defective area is generated while recording is performed at the maximum allowable speed, the replacement area replaces and records the data recorded in the defective area; And a defect management area for recording the location information of the defective area and the location information of the replacement area. The method of claim 5, And the maximum speed allowed by the optical disc means a lower speed among the maximum speed allowed by the optical disc and the maximum speed allowed by the recording / reproducing means for performing the recording and reproducing. The method of claim 5, And recording the allowable maximum speed value in the defect management area. The method of claim 5, And the optical disc is a rewritable Blu-ray Disc (BD-RE). The method of claim 5, And the optical disc is a write once Blu-ray disc (BD-WO). When the optical disc is loaded, checking the maximum recording speed allowed by the loaded optical disc, and determining the maximum speed for recording on the optical disc therefrom; If a defective area is generated while receiving a recording command and performing recording at the determined maximum speed, replacing the data recorded in the defective area with a replacement area, and recording the data; And recording the positional information of the defective area and the positional information of the replacement area in the defect management area of the optical disc as defect management information. The method of claim 10, The determining of the maximum speed may include determining a maximum recording speed allowed by the corresponding optical disc and a lower speed among the maximum recording speeds allowed by the recording / reproducing means for performing the recording and reproducing. The method of claim 10, And recording the maximum speed value further in the defect management information recorded in the defect management area. The method of claim 10, In the optical disc, types of recording related information (WS) to be applied for each allowable recording speed are designated. When recording at the determined maximum speed, recording is performed using the recording related information (WS) corresponding to the determined maximum speed. An optical disc recording method characterized in that.       A control unit which transmits a recording command to a specific area; Check the maximum recording speed allowed by the optical disc, determine the maximum speed for recording on the optical disc from this, and if a defective area is generated while performing recording at the determined maximum speed, replace the data recorded in the defective area. And a recording / reproducing section which records in place of the defect area and records the position information of the defective area and the position information of the replacement area as defect management information in the defect management area in the optical disc.