KR20110029307A - Recording medium, data recording method, and data recording apparatus - Google Patents

Abstract

PURPOSE: A recording medium, a data recording method, and a data recording apparatus are provided to effectively recording power about each recording layer. CONSTITUTION: An inner zone(210) in which management information of a recording medium, and data zone in which a user's data is recorded are successively allocated to a record layer. The inner area comprises a first test area in which a process of finding recording power is operated at the record layer. The first test area included in the record layer is arranged in the independent location to each other.

Description

Recording medium, data recording method, and data recording device {RECORDING MEDIUM, DATA RECORDING METHOD, AND DATA RECORDING APPARATUS}

The present invention relates to a recording medium, a data recording method and a data recording apparatus, and more particularly, to a recordable recording medium having a plurality of recording layers and a data recording method and recording apparatus of a recording medium.

As the amount of information possessed by an individual increases rapidly, a high density recording medium is required. As one of the methods of increasing the recording capacity, there is a method of providing a plurality of recording layers in the recording medium. Currently, a dual layer recording medium consisting of two recording layers is used, and further development of a recording medium having three or more recording layers has been made.

When data is recorded using optical pickup on a recording medium having a plurality of recording layers, the recording power of light for recording data should be appropriately set for each recording layer. If the optical recording power is set weakly, the desired data may not be recorded in the recording layer. If the optical recording power is set too strong, the recording medium may be damaged due to deterioration.

Therefore, there is a need for an efficient method of finding the recording power for each recording layer in the recording medium, and a recording medium having an area capable of performing the method for finding the recording power of the recording layer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and when recording data on a recording medium, an efficient method for finding a recording power in each recording layer and a method for finding a recording power efficiently can be recorded. The purpose is to provide the medium.

Accordingly, the present invention includes at least one recording layer in which an inner region in which management information of a recording medium is recorded and a data region in which user data is recorded are continuously allocated, wherein the inner region finds recording power in the recording layer. And a first test area in which the process is performed, wherein the first test area included in the recording layer is provided at positions independent of each other.

According to the present invention, the recording medium includes at least four recording layers, and the first test area included in the fourth recording layer overlaps with the first test area included in the second recording layer and half of the area. It provides an embodiment that is arranged.

The inner region may include a temporary disk management area in which management information of the recording medium is recorded, and the temporary disk management area included in the first recording layer is adjacent to the outer peripheral side of the first test area. The temporary disc management area disposed in the odd recording layer is disposed at the same physical location as the temporary disc management area provided in the first recording layer, and the temporary disc management area included in the even recording layer is An embodiment is disposed in the same physical location as the first test area provided in the first recording layer.

The present invention also provides an embodiment in which the direction of use of the first test area is opposite to the direction of writing data on the recording medium.

The present invention also provides an embodiment in which the direction in which the first test area is used is a direction in which a physical sector number of the recording medium decreases.

The present invention may further include an outer area in which the management information of the recording medium is recorded continuously in the data area, and the outer area is a second process of searching for recording power in the recording layer. An embodiment is provided that includes a test area.

The present invention also provides an embodiment in which the second test area is disposed at the same physical location in all the recording layers.

The present invention also provides a method for recording data on the recording medium including at least one recording area in which management information of a recording medium is recorded, and a recording layer in which data areas of user data are continuously recorded. Performing a process of finding recording power in the recording layer in an included first test area; And recording the data on the recording medium with the recording power, wherein the first test area included in the recording layer is disposed at positions independent of each other.

In addition, the present invention provides a data recording apparatus for recording data on the recording medium including at least one recording layer in which an inner area in which management information of the recording medium is recorded and a data area in which user data is recorded are continuously allocated. A pickup for recording the data on the recording medium; And a controller configured to perform a process of searching for recording power in the recording layer in the first test area included in the inner area, and controlling the pickup to record the data on the recording medium using the recording power. The first test area included in the recording layer provides a data recording apparatus disposed at positions independent of each other.

The present invention is not limited to the above-described embodiment, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the present invention pertains, and such modifications are within the scope of the present invention. Reveal.

According to the recording medium, the data recording method and the data recording apparatus according to the present invention, it is possible to efficiently find the recording power for each recording layer in the recording medium. Further, even when data is recorded at a high speed on the recording medium, the process of finding the recording power can be efficiently performed.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. In the following description, the same components are given the same names and the same reference numerals for the convenience of description.

The terminology used in the present invention is a general term that is currently widely used as possible, but in certain cases, the term is arbitrarily selected by the applicant, and in this case, since the meaning is described in detail in the description of the present invention, The present invention should be understood as meanings of terms rather than names.

In the present invention, the recording medium means any medium on which data is recorded or can be recorded. For example, a recording medium is meant to encompass all media regardless of a recording method such as a disk or a magnetic tape. Hereinafter, the present invention will be described by using a disc (Disc), especially a Blu-ray Disc (BD), as a recording medium as an example for convenience of description, but the technical idea of the present invention is equally applicable to other recording media. Will be self explanatory.

In the present invention, one of the Blu-ray Discs (BDs) will be described based on the recording medium of the write once type (BD-R) or the rewritable type (BD-RE). Applicability to the media is also obvious.

In addition, in the present invention, OPC (Optimum Power Control) is a recordable recording medium (e.g., BD-R, BD-RE, etc.), which is an optimal recording power used when recording data on the recording medium. Refers to the process of calculating. In addition, an OPC (Optimum Power Control) area means an area allocated for performing an OPC process in a recording medium.

That is, when the disc is loaded in the data recording apparatus, the data recording apparatus repeatedly records a signal at a specific recording power in the OPC area of the disc and then reproduces it, thereby ensuring a desired reproduction quality. Calculate the optimal recording power. The data recording apparatus uses the optimum recording power determined through the above process when recording data on the corresponding disk.

In the present invention, the DCZ (Drive Calibration Zone) area is an area utilized by a data recording device (or drive) in a recording medium, and various tests requiring a data recording device including an OPC process. It means the area that can be performed.

Here, both the OPC area and the DCZ area can be utilized for the OPC process. In the present invention, the OPC area and the DCZ area are collectively referred to as a test area, and the OPC process is performed in the OPC area described below. Is also applicable to the DCZ area.

In addition, the recording medium of the present invention may be configured in a predetermined unit. In one example, the recording medium includes a unit called a cluster, and the cluster includes a data frame that is a lower unit. One cluster may be composed of 32 data frames. However, the name and number of each unit may vary depending on the type of recording medium.

1 shows the structure of a recording medium 10 according to an embodiment of the present invention.

FIG. 1 illustrates a quadruple layer recording medium 10 composed of four recording layers L0, L1, L2, and L3. However, the present invention is not limited to this and is applicable to all recording media 10 composed of a single layer and two or more recording layers. Since each recording layer can be configured in the same structure, the present invention will be described with reference to the first recording layer (L0).

The recording medium 10 includes an inner zone 210, an outer zone 230, and a data zone 220.

The inner region 210 is located on the inner circumference side of the recording medium 10, and the outer region 230 is located on the outer circumference side of the recording medium 10 to store various kinds of information for controlling the recording medium 10. do. In one example, the inner region 210 and the outer region 230 include a test area, such as an OPC area or a DCZ area, which performs an OPC process.

The data area 220 stores data that a user wants to record. The portion surrounded by the inner region 210 and the outer region 230 on the recording medium 10 becomes a region where data is actually recorded.

The data area 220 may include an inner spare area (ISA) 221, an outer spare area (OSA) 223, and a user data area 222. In the spare areas 221 and 223, additional information and defect replacement information of the recording medium 10 are recorded.

2 and 3 illustrate a structure of an inner region 210 including an OPC region according to an embodiment of the present invention.

FIG. 2 shows a structure of an inner region 210 in a recording medium 10 having three recording layers L0, L1, and L2. FIG. 3 shows four recording layers L0, L1, L2, and L3. The structure of the inner region 210 in the recording medium 10 is shown.

Incidentally, although the figure shows the structure of the rewritable disc BD-RE for convenience of explanation, it is obvious that the present invention is also applicable to the write-once recording medium BD-R.

First, when the structure of the inner region 210 of the present invention is described in detail, the inner region 210 may include a permanent information & control data (PIC) region, an info region, an OPC region, and a temporary disc management region. Area (TDMA), a Protection Zone, and a Reserved Area.

In the PIC area, management information of the recording medium 10 is recorded as an embossed high frequency modulated (HFM) signal.

In the information area, management information of various recording media 10 such as a disc management area (DMA) is recorded. The inner region 210 includes two info regions INFO1 and INFO2.

The OPC area is used as a test area for performing the OPC process.

In the temporary disc management area (TDMA), a temporary disc definition structure (TDDS), a temporary defect list (TDFL), information indicating the recording state of the user data area 222, and the like are recorded.

The protection area is an area for disk protection. In particular, the protection area provided at the innermost portion of the inner area 210 is called a protection area 1 and is located between the PIC area and the second info area INFO2. This protection zone is called a protection zone 2. In particular, the second protected area is used as a kind of buffer area (Buffer Zone for Changeover) utilized as a change section from the embossed HFM area to the recordable area.

Reserved area is reserved area for future use.

In this connection, the recording medium 10 having a plurality of recording layers each has an OPC area in the recording layer. The OPC area of each recording layer is used to find the optimal recording power for recording in the recording layer. However, since the optimum recording power is found using various powers during the OPC process, if the OPC region is located at a physically close location, the interference of the beam is likely to occur, and the optimal recording power is hindered.

Therefore, the OPC areas provided in the respective recording layers are not arranged at the same physical position. In other words, the OPC areas of each recording layer are not disposed at the same vertical position.

Referring to the inner region 210 of the recording medium 10 having three recording layers L0, L1, and L2 in FIG. 2, the OPC0 region 211 provided in the L0 recording layer is formed from the outer periphery of the inner region 210. It is located after the INFO1 area and the TDMA0 area. The OPC1 region 222 provided in the L1 recording layer is located after the first protective region and the reserved region from the inner circumference of the inner region 210.

The OPC2 area 223 provided in the L2 recording layer is located after the first protective area and the reserved area from the inner circumference of the inner area 210. After the OPC2 region 223, a buffer region is provided. As shown in FIG. 2, the reserved area and the buffer area located close to the OPC2 area 223 in the L2 recording layer may have the same size. In addition, the overall size of the reserved area, the OPC2 area 223, and the buffer area located on the inner circumferential side of the L2 recording layer may be the same as the size of the reserved area located on the inner circumferential side of the L1 recording layer.

For example, each of the above-described OPC0 region 221, OPC1 region 222, and OPC2 region 223 may have a size of 2408 clusters. In addition, as shown in FIG. 2, they are not disposed at the same physical location. That is, they are not disposed at the same position vertically.

Referring to the inner region 210 of the recording medium 10 having four recording layers L0, L1, L2, and L3 in FIG. 3, first, the structures of the L0, L1, and L2 recording layers are described above in FIG. It is configured in the same way.

The OPC3 region 224 provided in the L3 recording layer is located after the first protective region and the reserved region from the inner circumference of the inner region 210. The OPC3 region 224 of the present invention is disposed to overlap with the OPC1 region 222 vertically. That is, the outer circumferential half region of the OPC1 region 222 is provided at the same physical position as the inner circumferential half region of the OPC3 region 224.

If the OPC3 region 224 is located on the inner circumferential side of the inner region 210 than the OPC2 region 223, the OPC3 region 224 is further away from the data region 220 where the actual data is recorded, thereby recording the actual data and performing the OPC process. The use of the pickup 70 to be described later becomes inefficient. This is because the distance between the area where the OPC process is performed and the area where actual data is recorded is increased. 4, the OPC area use direction is opposite to the data recording direction, so that the OPC3 area 224 is used from the inner circumference to the outer circumferential direction of the inner area 210. In this case, when the OPC3 region 224 is located on the inner circumferential side of the inner region 210, the pickup 70 must be moved to the inner circumferential side starting point of the OPC3 region 224 to perform the OPC process. The use of becomes inefficient.

In addition, when the OPC3 region 224 is physically disposed at the same position as the OPC1 region 222, as described above, the possibility of the interference of the beam is increased, and it is disturbed to obtain the optimal recording power in the recording layer. do.

Accordingly, the above-described problems are solved by arranging the OPC3 region 224 so that the half of the region and the OPC1 region 222 overlap.

Regarding the arrangement in each recording layer for the temporary disk management area (TDMA) of the present invention, first, the TDMA0 area disposed in the first recording layer is disposed adjacent to the outer peripheral side of the OPC0 area. The temporary disk management areas TDMA0 and TDMA2 provided in the odd-numbered recording layer are disposed at the same physical position as the TDMA0 area, and the temporary disk management areas TDMA1 and TDMA3 provided in the even-numbered recording layer are different from the OPC0 area. Placed in the same position.

4 illustrates a direction of use of an OPC region according to an embodiment of the present invention.

In the present invention, the direction in which the OPC area is used means the direction in which the data recording apparatus performs the OPC process in the OPC area. That is, the direction in which the OPC area is used is a direction in which the data recording apparatus records a signal at a specific recording power in the OPC area and reproduces it in order to calculate an optimal recording power.

First, the data recording apparatus performs tracking in a direction in which a physical sector number (PSN) of the recording medium 10 increases. In other words, it can be said that the physical sector numbers of the sectors in the recording medium 10 increase in the tracking direction, and the direction in which the physical sector numbers increase is the tracking direction of each recording layer.

The data recording apparatus then records the data on the recording medium 10 in a direction in which the physical sector number increases, such as the tracking direction described above. Therefore, the data recording direction is the same as the tracking direction. As shown in Fig. 4, the data recording direction, the tracking direction, or the direction in which the physical sector number increases is the inner circumferential direction of the recording medium 10 in the odd-numbered recording layers L0 and L2, and the even-numbered recording layer ( In L1 and L3, they are in the circumferential direction from the outer circumference of the recording medium 10.

The use direction of the OPC area of the present invention becomes the direction opposite to the data recording direction. That is, the direction of use of the OPC area is performed from a sector portion having a large physical sector number to a small sector portion. That is, as shown in FIG. 4, the direction of use of the OPC area is in the circumferential direction from the outer circumference of the recording medium 10 in the odd-numbered recording layers L0 and L2, and in the even-numbered recording layers L1 and L3. The inner circumference of (10) becomes the outer circumferential direction. Therefore, the data recording apparatus sets the use direction of the OPC area in the direction opposite to the data recording direction.

Since the OPC area is used in the reverse order of the physical sector number, for example, in the OPC0 area 221 of the L0 recording layer, it is used to perform the OPC process from the cluster closest to the TDMA0 area among 2408 clusters. On the other hand, in the OPC1 region 222, it is used to perform the OPC process from the cluster farthest from the buffer region among the 2408 clusters.

After the OPC process is performed in the OPC area, the data recording apparatus can erase the data recorded in the area used as the OPC process.

5 illustrates a structure of an outer region 230 including a DCZ region 231 according to an embodiment of the present invention. For convenience of description, the structure of the write-once recording medium BD-R having three recording layers is shown, and the recording medium 10 having four or more recording layers 10 or the rewritable recording medium BD-RE is shown. Applicability to is obvious.

The outer area 230 of the present invention may have the same structure for each recording layer, and the outer area 230 of each recording layer may have a third info area INFO3 and an angler buffer from the inner circumference of the recording medium 10. An Angular Buffer (4) region, a fourth info region (INFO4), a DCZ region (231, DCZ0 to 2), and a third protection region (Protection Zone 3) are provided.

The two INFO areas INFO3 and INFO4, the protection area and the angler buffer area play the same role as the INFO area, the protection area, and the buffer area located in the above-described inner area 210.

The DCZ areas 231 and DCZ0 to 2 are located between the INFO4 area and the third protection area (Protection Zone 3), and are areas for drive calibrations. And, unlike the OPC area described above, the DCZ area 231 is disposed at the same physical location in each recording layer.

As described above, the DCZ area 231 is a kind of test area in which the data recording apparatus tests the recording medium 10 for various purposes. In general, the DCZ area 231 is the same as the OPC area, which is another test area. It is possible to carry out the OPC procedure. However, it is obvious that the DCZ region 231 may perform another test in addition to the OPC process, but the present invention is not limited thereto.

As in the OPC area, the data recording apparatus may perform the OPC process in the DCZ area 231 and then erase the data recorded in the area used in the OPC process.

As the DCZ region 231 is provided in the outer region 230 of the recording medium 10, the data recording apparatus performs an OPC process in addition to the OPC region of the inner region 210, as well as the DCZ region 231 of the outer region 230. ) Can be performed. Therefore, the data recording apparatus can efficiently perform the OPC process when recording data on the recording medium 10 at a high speed.

The DCZ region 231 of each recording layer can be named DCZ0 region in the L0 recording layer, DCZ1 region in the L1 recording layer, and DCZ2 region in the L2 recording layer.

In addition, the data recording apparatus can set the use direction of the DCZ area 231 in the direction opposite to the data recording direction, that is, the tracking direction, similarly to the use direction of the OPC area described above.

6 is a block diagram of a data recording apparatus according to an embodiment of the present invention.

Looking at the overall configuration of the data recording apparatus of the present invention in detail, first, the pickup 70 has a laser diode therein to record data on the surface of the recording medium 10, or in the recording medium 10 Read the reflected signal.

In addition, the pickup 70 performs an OPC process under the control of an OPC controller to be described later.

The servo 90 controls the tracking and focusing operation of the pickup 70 and the operation of the spindle motor 110.

 The R / F unit 80 generates a focus error signal and a tracking error signal, which are signals for detecting focus deviation and track deviation of the laser beam, using signals output from the pickup 70. do.

The spindle motor 110 rotates a disc mounted in the data recording device.

The motor driver 100 drives the operation of the pickup 70 and the spindle motor 110 under the control of the servo 90.

The signal processor 40 restores the RF signal received from the R / F unit 80 to a desired reproduction signal value, or modulates and outputs a data signal to be recorded in a format recordable on the recording medium 10. .

The bit encoder 50 converts the write signal output from the signal processor 40 into a bit stream, and the pickup driver 60 transmits the bit stream generated by the bit encoder 50 to the recording medium 10. Convert to an optical signal to be stored.

The memory 150 temporarily stores information related to the recording medium 10 such as defect information of the recording medium 10 or performs a buffer function for temporarily storing data to be recorded or reproduced on the recording medium 10. do.

The microcomputer 120 is configured to control the signal processor 40, the servo 90, and the memory 150, and controls a drive including the components to perform a data recording or reproducing operation.

The OPC control unit 130 controls the pickup 70 so that the OPC control unit 130 controls the pickup 70 in the OPC areas 221 to 224 provided in the inner area 210 of the recording medium 10 or in the DCZ area 231 provided in the outer area 230. Perform the OPC process. That is, the OPC control unit 130 controls the pickup 70 to record a signal at a specific recording power in the OPC areas 221 to 224 or the DCZ area 231, and then repeatedly reproduces the signal. The optimal recording power for ensuring playback quality is calculated. The microcomputer 120 uses the optimal recording power determined through the OPC process when recording data on the recording medium 10.

Here, the recording medium 10 of the present invention includes an OPC area (221 to 224) for performing the OPC process of the recording layer for each recording layer. In addition, the OPC control unit 130 performs an OPC process for calculating an optimal recording power for securing a desired reproduction quality in each recording layer of the recording medium 10 in the OPC areas 221 to 224 provided in each recording layer. To perform.

The recording medium 10 of the present invention includes a DCZ area 231 for performing an OPC process on the outer area 230 of each recording layer. Therefore, the data recording apparatus can perform the OPC process efficiently by performing the OPC process in the DCZ region as well as the OPC region when recording data on the recording medium 10 at a high speed.

In addition, the OPC control unit 130 can set the use direction of the OPC areas 221 to 224 and the DCZ area 231 in a direction opposite to the data recording direction, that is, the tracking direction.

The OPC control unit 130 is illustrated as one component, but the present invention is not limited thereto. The functions of the OPC control unit 130 may be performed by interworking with several components, and the OPC control unit 130 may be implemented in an integrated form with the microcomputer 120 and / or the host 140. In addition, the OPC control unit 130 includes a signal processor 40, a bit encoder 50, a pickup driver 60, a pickup 70, a servo 90, a motor driver 100, a spindle motor 110, and a microcomputer ( 120 may be additionally connected to a drive including the memory 150 to enable updating.

The host 140 is in charge of controlling all components of the data recording apparatus, and interfaces with a user to control recording or reproducing of the recording medium 10. Specifically, the host 140 transmits a command to the microcomputer 120 to cause the data recording apparatus of the present invention to perform a specific function, and the microcomputer 120 is configured to interoperate with each other in the data recording apparatus according to the command. To control them.

In relation to this, the microcomputer 120 and the host 140 may operate separately, and the functions of the microcomputer 120, the OPC control unit 130, and the host 140 may be integrated into one control unit. It is also possible to work.

The host 140 may be a main controller of a computer, a server, an audio device, or a video device. That is, the recording apparatus of the present invention may be an optical drive provided to a personal computer (PC) or the like, or may be a player not mounted on the personal computer or the like.

Therefore, the data recording apparatus according to the present invention can be applied to both an optical drive and a player utilized as a single product mounted and operated inside a PC.

In addition, the AV encoder 20 converts an input signal into a signal of a specific format recordable on the recording medium 10 and transmits the data to the signal processor 40 in order to record data on the recording medium 10. For example, the AV encoder 20 may encode the input signal into an MPEG format signal. The signal processor 40 adds an error correction code (ECC) to the signal encoded by the AV encoder 20, converts the signal into a format recordable on the recording medium 10, and transmits the converted signal to the bit encoder 50.

In addition, the AV decoder 30 finally decodes the reproduction signal of the recording medium 10 received from the signal processing unit 40 and provides it to the user as output data such as a video and an audio signal.

The components of the data recording apparatus according to the present invention described above may be implemented as software or hardware to perform respective functions, or may be implemented by interlocking software and hardware with each other.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings, and the present invention is also provided. Naturally, it belongs to the range of.

1 shows the structure of a recording medium according to an embodiment of the present invention.

2 and 3 illustrate the structure of an inner region including an OPC region according to an embodiment of the present invention.

4 illustrates a direction of use of an OPC region according to an embodiment of the present invention.

5 illustrates a structure of an outer region including a DCZ region according to an embodiment of the present invention.

6 is a block diagram of a data recording apparatus according to an embodiment of the present invention.

Claims (19)

At least one recording layer in which an inner region in which management information of the recording medium is recorded and a data region in which user data is recorded are continuously allocated; The inner region includes a first test region in which a process of searching for recording power in the recording layer is performed; And the first test area included in the recording layer is disposed at positions independent of each other. The method of claim 1, The recording medium comprises at least four recording layers; And the first test area included in the fourth recording layer is overlapped with the first test area included in the second recording layer and half of the area. The method of claim 1, The inner area includes a temporary disk management area in which management information of the recording medium is recorded; The temporary disc management area included in the first recording layer is disposed adjacent to the outer peripheral side of the first test area, The temporary disc management area included in the odd recording layer is disposed at the same physical location as the temporary disc management area provided in the first recording layer, And the temporary disc management area included in the even-numbered recording layer is disposed at the same physical location as the first test area provided in the first recording layer. The method of claim 1, And a direction in which the first test area is used is opposite to a direction in which data is recorded on the recording medium. The method of claim 4, wherein And a direction in which the first test area is used is a direction in which a physical sector number of the recording medium decreases. The method of claim 1, The recording layer further includes an outer area in which management information of the recording medium is recorded successively in the data area. The outer area includes a second test area in which a process of searching for recording power in the recording layer is performed. The method of claim 6, And the second test area is disposed at the same physical location in all recording layers. In recording data on the recording medium comprising at least one recording layer in which an inner area in which management information of the recording medium is recorded and a data area in which data of the user is recorded are continuously allocated. Performing a process of finding recording power in the recording layer in a first test area included in the inner area; And Recording the data on the recording medium using the recording power; And the first test area included in the recording layer is disposed at positions independent of each other. The method of claim 8, The recording medium comprises at least four recording layers; And the first test area included in the fourth recording layer is overlapped with the first test area included in the second recording layer. The method of claim 8, Performing a process of finding the recording power, And using the first test area in a direction opposite to a direction in which data is recorded on the recording medium. 11. The method of claim 10, And a direction in which the first test area is used is a direction in which a physical sector number of the recording medium decreases. The method of claim 8, The recording layer further includes an outer area in which management information of the recording medium is recorded successively in the data area. Performing a process of finding the recording power, And a data recording method performed in the second test area included in the outer area. 13. The method of claim 12, And the second test area is disposed at the same physical location in all recording layers. A data recording apparatus for recording data on a recording medium comprising at least one recording layer in which an inner area in which management information of a recording medium is recorded and a data area in which data of a user is recorded are continuously allocated. A pickup for recording the data on the recording medium; And Performing a process of finding recording power in the recording layer in a first test area included in the inner area, A control unit for controlling the pickup to record the data on the recording medium at the recording power; And the first test area included in the recording layer is disposed at positions independent of each other. The method of claim 14, The recording medium comprises at least four recording layers; And the first test area included in the fourth recording layer overlaps the first test area and half the area included in the second recording layer. The method of claim 14, The control unit, And a direction in which a direction of use of the first test area is set in a direction opposite to a direction in which data is recorded on the recording medium. The method of claim 16, And a direction in which the first test area is used is a direction in which a physical sector number of the recording medium decreases. The method of claim 14, The recording layer further includes an outer area in which management information of the recording medium is recorded successively in the data area. The control unit, And a data recording apparatus for controlling the pickup to perform a process of finding the recording power in a second test region included in the outer region. The method of claim 18, And the second test area is disposed at the same physical location in all recording layers.

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