JP2001035132A - Disk drive device and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve transfer rate at the time of recording. SOLUTION: At the time of detecting that recording command is supplied (S004), at first, the discrimination of erase information is performed (S005) and, when the erase information is, for instance, '1', the retrieval of information of the area which is already recorded is performed (S008). Subsequently, the discrimination is performed as to whether the recording area corresponding to the address indicated by the recording command is already recorded or not (S009), when the recording area is discriminated to be unrecorded area, an erasing step is not performed and the recording step in which the recorded data is recorded in the said unrecorded area is performed (S010). Thereby, the area which is already recorded (unrecorded area) is updated and, therefore, the update of the area which is already recorded is performed (S011). Further, when the recording area corresponding to the address indicated by the recording command is discriminated to be the area which is already recorded, the other address is demanded, for instance, to a host computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device and a recording medium which improve a transfer rate by omitting a step of recording a magneto-optical disk.

[0002]

2. Description of the Related Art Disk-shaped recording media such as optical disks and magneto-optical disks have become widespread as portable media. In particular, a data rewritable magneto-optical disk (MO disk) is suitable as a medium for computer use.

[0003]

When data is recorded on a magneto-optical disk, a disk drive corresponding to the magneto-optical disk needs to record data transferred from, for example, a host computer to a required recording medium. It will be recorded by the operation. in this case,
In a disk drive device, after an erasing operation is performed on an area where recording is performed, the operation shifts to a recording operation. In other words, when recording is performed, an erasing process is required, which lowers the data transfer rate between the disk drive device and the host computer. Therefore, such a magneto-optical disk is not suitable for recording data such as music or video that needs to be subjected to signal processing in real time. Therefore, it is desired to realize a recording operation at a high transfer rate by omitting the above-described erasing process when recording data.

[0004]

According to the present invention, there is provided a disk drive in which, as a data recording operation, a recording step is performed after an erasing step for a recording position is performed. In the apparatus, a data signal recorded on a disk-shaped recording medium is read out by irradiating a laser beam, and a required magnetic field is applied to a portion irradiated with the laser light, whereby data on the disk-shaped recording medium is read. From the management information area of the disc-shaped recording medium, and from the management information area of the disc-shaped recording medium, recorded area management information for managing a recorded area in which data is recorded in the recording area of the disc-shaped recording medium. A recorded area management information detecting means for detecting, and an unrecorded area based on the recorded area management information. A search to find means for the relative unrecorded area, constituting the disc drive device provided with a recording control means to perform the data recorded by only the recording process.

In a management information area in which required management information is recorded, erase information indicating whether or not the erasing step has been performed over the entire recording area, and a recording area in which data is recorded in the recording area. A recording medium is configured by recording recorded area management information for managing a recorded area.

According to the disk drive of the present invention,
When there is an unrecorded area in the recording area of the loaded disk-shaped recording medium, the position of the unrecorded area is grasped, and only the recording step is performed when recording is performed on this unrecorded area. Like that. This makes it possible to reduce the processing time spent in the erasing step.

Further, the recording medium of the present invention can show erase information and recorded area information to a disk drive device to be loaded. Therefore, the disc drive device can determine the unrecorded area on the recording medium based on the recorded area information.

[0008]

Embodiments of the present invention will be described below in the following order. The disk drive of the present embodiment employs a so-called light modulation type magneto-optical recording system. 1. 1. Configuration of disk drive device Management information area 3. Recording operation transition

1. Configuration of Disk Drive Device FIG. 1 is a block diagram illustrating a configuration example of a disk drive device according to the present embodiment. In this figure, the same circled alphabetic characters (a, b, c, d, e) indicate the same signal path.

The disk 16 is a disk drive 1
When it is set to 0, it is placed on a turntable (not shown) and rotated at a constant linear velocity (CLV) or a constant angular velocity (CAV) by a spindle motor 17 during a recording / reproducing operation. An optical head 18 including a laser diode 11, an objective lens 15, and a bias magnet 61 for applying a bias magnetic field to the disk 16 when recording / erasing data as described below.
Thereby, data recorded on the recording surface of the disk 16 is read, or data is recorded on the recording surface of the disk 16.

The objective lens 15 is moved in the radial direction of the disk 16 and the disk 16 by a biaxial mechanism 29 described later.
The optical head 18 including the objective lens 15 is entirely movable in the radial direction of the disk 16 by a slide mechanism (not shown).

A laser beam output from a laser diode 11 serving as a laser beam emission source reaches a reflection mirror 14 via a beam splitter 12 configured to transmit a polarized wave of the laser beam. Although the laser light is linearly polarized light, it has some polarization distribution, and there is a light flux reflected by the beam splitter 12. In this way, the beam splitter 12
The light beam reflected by reaches the photodetector 13 for monitoring the laser output power. The laser light detected by the photodetector 13 is converted into a required current Im and supplied to an error amplifier (Auto Power Control) 21 for laser power control. The error amplifier 21 is supplied with a current Iout as a reference of the laser power output from the laser power control unit 22. Therefore, the laser beam currently detected from the error amplifier 21 and the disk drive 10
A current corresponding to the reference level defined in is output, and the impedance of the transistor element 23 that controls the laser diode 11 is controlled. As a result, the output power of the laser light from the laser diode 11 becomes Im
= Iout is performed, and the output power of the laser beam can be kept constant.

The current Iout output from the laser power control unit 22 is a value stored in a register provided in the laser power control unit 22 based on a power setting signal PS supplied from the drive control unit 30. Can be changed by setting. Therefore, the current Iout can be controlled so as to have a required output waveform corresponding to each operation, such as a data recording power, a data reproducing power, and a data erasing power.

The laser light that has passed through the beam splitter 12 and has reached the reflection mirror 14 is reflected there, and further irradiates the recording surface of the disk 16 via the objective lens 15. The objective lens 15 is supported by a biaxial mechanism 29 so as to be movable in a tracking direction and a focus direction. Note that a state in which the focal position of the objective lens 15 is focused on the surface of the recording surface of the disk 16 is called just focus.

The polarization direction of the laser light applied to the recording surface of the disk 16 is rotated by the magnetic field direction of the pit information formed on the recording surface. Therefore, the light is reflected by the disk 16 and is reflected by the beam splitter 12
Out of the laser light that has reached, for example, the laser light whose polarization direction has changed based on the magnetic field direction of the pit information is reflected and reaches the reproduced data detection photodetector 20. The photodetector 20 is configured to have, for example, four divided detection regions, and a detection current from each detection region is supplied to a current / voltage detector 24. Then, for example, in the example shown in this figure, a sum signal SUM obtained by adding the focus error signal FESO, the tracking error signal TESO, and the detection currents detected in all the detection areas is formed.

The focus error signal FESO and the tracking error signal TESO are each controlled by an auto gain control circuit (Auto Gain Control) in order to prevent their levels from changing according to the output power of the laser beam.
rol ... The acronym is called AGC circuit below.
5. The AGC circuit 26 is controlled based on the sum signal SUM to obtain a required output level. AGC
The focus error signal FES, the gain of which has been adjusted by the circuit 25, is supplied to a drive control unit 30 which is constituted by, for example, a microprocessor unit and performs, for example, servo control.

A required focus bias is applied to the focus error signal FES by the drive control unit 30.
The signal is supplied to the two-axis driver 28 as a focus drive signal through a compensation filter (not shown). Then, the biaxial driver 28 drives the biaxial mechanism 29 based on the focus drive signal FS. Also, A
The tracking error signal TES whose gain is controlled by the GC circuit 26 is also supplied to the drive control unit 30. Then, the drive control unit 30 forms a required tracking drive signal TS based on the tracking error signal TES and supplies it to the two-axis driver 28.

The biaxial driver 28 includes, for example, a focus coil driver and a tracking coil driver. The focus coil driver supplies the drive current generated based on the focus drive signal FS to the focus coil of the biaxial mechanism 29, thereby driving the objective lens 15 in a direction (focus direction) in which the objective lens 15 comes into contact with or separates from the disk surface. . The tracking coil driver supplies the drive current generated based on the tracking drive signal TS to the tracking coil of the biaxial mechanism 28 so as to move the objective lens 15 in the disk radial direction (tracking direction). Drive. Thereby, a tracking servo loop and a focus servo loop by the objective lens 15, the photodetector 20, the AGC circuits 25 and 26, the drive control unit 30, and the two-axis driver 29 are formed.

On the other hand, the output of the photodetector 20 is also supplied to a current / voltage converter 32, where the output is converted into a reproduction signal containing address information of data read from the disk 16, and then supplied to a variable gain setting unit 33. You. The variable gain setting unit 33 controls the VG supplied from the drive control unit 30
A level adjusting means for performing equalizing processing on the reproduced RF signal based on an A (Variable Gain Amp) setting signal Val, an equivalent filter, and the like are provided. The reproduced RF signal adjusted and output to a required amplitude level by the variable gain setting section 33 is converted into a binary signal (digital signal) based on a reference voltage 35 by a comparator 34, and a PLL (Phase Locked Loop). The signal is supplied to the circuit 40.

The PLL circuit 40 includes a phase comparator 41, a voltage controlled oscillator (Voltage Controlled Oscillator) 42,
It is provided with a low-pass filter 44 and generates a reproduction clock PLCK synchronized with the channel bit frequency of the input binary signal. That is, the binary signal supplied from the comparator 34 is output to the phase comparator 41 by the VCO
The phase is compared with the reproduction clock PLCK output from the phase clock 42, and the phase error detected by the phase comparator 41 is converted into a voltage level corresponding to the phase error by passing through the low-pass filter 44. This voltage level is used as a phase error signal. Then, by controlling the oscillation frequency of the VCO 42 with the phase error signal, a reproduced clock PLCK synchronized with the binarized signal is generated. The reproduction clock PLC generated in this manner
K is supplied to the flip-flop circuit 43 together with the binarized signal, and reproduced data RD synchronized with the reproduced clock PLCK is generated.

The data transfer control section 50 is an interface means for performing communication control for performing required data communication with a host computer (not shown).
It controls, for example, a recording / reproducing system such as a CSI (Small Computer Serial Interface) interface 54, a data decoder 52, and a data encoder 56. The reproduction data RD is supplied to an address detector 51 and a data decoder 52.
Supplied to The address detection unit 51 extracts an address signal of the reproduction data RD from the reproduction data RD and demodulates it. The data decoder 52 decodes the reproduction data RD while performing necessary address management based on the address signal detected by the address detection unit 51. The data decoder 52 extracts an error correction code such as an ECC (Error Collection Code) attached to the reproduction data RD, performs a required error correction process, and verifies a read error on the reproduction data RD. Perform After the reproduction data RD decoded by the data decoder 52 is stored in the reproduction buffer 53, the reproduction data RD of a required data unit is accumulated.
The data is transferred to the host computer via the SI interface 54.

The data transfer control unit 50 will be described later with reference to FIG.
A memory 59 capable of storing various types of management information recorded in the management information area of the disk 16 described below. This management information is, for example, information that is read when the disk 16 is loaded. That is, after the disk 16 is loaded, the disk drive device 10 refers to the information stored in the memory 59 to perform recording control. , Playback control and the like. When updating the management information, for example, the management information stored in the memory 59 is updated, and the updated management information is recorded in the management information area of the disk 16. I do. The timing at which the management information area of the disk 16 is updated depends on whether the disk drive 1
The disc 16 may be ejected from 0, or may be performed as needed while the disc 16 is being used.

On the other hand, in the recording operation, when a recording command is received from, for example, a host computer, the required laser output power is generated in the laser power control unit 22 based on the laser power setting signal PS output from the drive control unit 30. Move to the set recording mode. Data to be recorded in the recording mode is stored in the recording buffer 55 via the SCSI interface 54. Also in this case, after recording data of a required data unit for recording is accumulated, recording is performed for each data unit. The address on the disk 16 for recording data is supplied from the host computer,
For example, the gate signal generator 58 performs address management.
That is, when the laser beam (beam spot) scans the recording surface of the disk 16, the gate signal generator 58 outputs the target specified by the host computer based on the address signal supplied from the address detection unit 51. At the timing of the address, a timing signal Tim for causing the laser power control unit 22 to execute the writing of the recording data is output. Further, in synchronization with the timing signal Tim, the data encoder 56 supplies the recording data WD and a recording clock WC for data synchronization corresponding to the recording data WD to the laser power control unit 22. Further, the data encoder 56 adds an error correction code to the recording data as the ECC format processing.

The laser power control unit 22 receives the timing signal Tim, the recording clock WC, and the recording data WD in the recording mode to change the current Iout corresponding to the recording data WD to the recording level current. To the error amplifier 21. Therefore, the laser diode 11 outputs a laser beam of a recording level based on the current Iout.

A bias magnet 61 is arranged at a position facing the objective lens 15 with the disk 16 interposed therebetween. The bias magnet 61 performs an operation of applying a bias magnetic field to the disk 90 when recording / erasing data as described above. Bias magnet 61
Is controlled by the bias magnet driver 60. The bias magnet driver 60 includes the drive control unit 30
The bias magnet 61 generates the above-described erasing bias magnetic field and the recording bias magnetic field in the bias magnet 61 at the time of recording / erasing based on the drive signal from the microcomputer.

Here, recording, erasing, and
The principle of the reproducing operation will be described.

First, the principle of erasing data is shown in FIG. At the time of erasing, an external magnetic field for erasing is generated by the bias magnet 61. In this case, the upper part in the drawing is the S pole, and the lower part is the N pole.
Make it a pole. Then, after the laser irradiation position (the position of the objective lens 15) is moved to a predetermined position where data is to be erased by a required tracking operation, continuous laser irradiation is performed as an output level for erasing. As a result, in the area to be erased, the recording film of the disk 16 is entirely magnetized in a certain direction according to the external magnetic field for erasing, that is, the pit information formed in the magnetic pole direction is erased. Become.

FIG. 3 shows the principle of the recording operation after the erasure is performed as described above. At this time, an external magnetic field for recording is generated by the bias magnet 61. In this case, the upper part in the drawing is the N pole, and the lower part is the S pole, that is, the magnetic field polarity in the direction opposite to that in the erase. In this state, recording level laser irradiation is performed only at the timing when pit information is to be formed. That is, the laser is turned on / off according to the data "1" and "0" to be recorded. In this case, only the portion irradiated with the laser is magnetized with the polarity according to the external magnetic field by the bias magnet 61, that is, only the portion of the recording film has the opposite polarity to the other portions. This is formed as pit information according to the direction of the magnetic field. In other words, in the prior art, a series of data recording operations were performed in two stages of an erasing process and a recording process. However, in the present invention, as shown in FIG. The process is performed, and the data recording operation is performed only in the recording process. Therefore, the disk drive device 1
0, the erasing process (hereinafter referred to as “the erasing process”) over the entire recording area.
It can be determined whether or not the entire surface has been erased, based on erase information described below.

2. Management Information Area FIG. 4 is a schematic diagram illustrating an example of a recording area formed on the disk 16. As shown in FIG. 4A, a calibration zone in which various calibrations are performed is formed from, for example, the inner peripheral side of the disk 16. Then, a management information area is formed following the calibration zone. In the management information area, information such as replacement information, erase information, and recorded area information is recorded. After the management information area, zones “0” to “n” are formed as recordable areas from address “0” to address “n”. In each zone, a user data area and a replacement area corresponding to the user data area are formed. For example, user data supplied from a host computer or the like is recorded in the user data area. The replacement area is formed corresponding to each user data area, and is used as a replacement area when, for example, a defect is detected in the user data area.

The replacement information in the management information area stores address information of data replaced in the user data area. Further, in the present invention, erase information and recorded area information are stored as management information in the management information area. Erase information is stored on disk 1
In the user data area No. 6, for example, “1” is set when the entire erase is performed. This is, for example, the case where the user has performed the erase command via the host computer using the erase command, or the case where the user has performed a format process, for example. That is, in the disk drive device 10, when it is determined that the erase information is "1", it is determined that there is an unrecorded area in which data is not recorded in any of the user areas. Will be able to Therefore, it is possible to identify a recording area and an unrecorded area and execute a recording operation control described later.

As shown in FIG. 4B, the recorded area information stores, for example, a start address and an end address of an area of the disk 16 where data has been recorded. This FIG.
As shown by hatching in FIG.
5 shows a state where the recording data R0 and R1 in the recording data R1 and the recording data R3 in the zone “0” are recorded. Therefore, as the recorded area information, FIG.
Address S0 to address E as shown in FIG.
0, address S1 to address E0, and address S2 to address E2 of zone "1" are recorded.
By referring to the recorded area information, the disk drive device 10 can grasp the position of the recorded area, that is, can recognize an unrecorded area that has not been recorded.

Therefore, in the present embodiment, when user data is recorded by the disk drive device 10, the presence or absence of an unrecorded area is identified based on the erase information, and when it is determined that there is an unrecorded area. For example, comparing the recording address specified by the host computer with the address of the recorded data stored in the recorded area, and if they do not match, assuming that recording is performed on the unrecorded area, The recording operation without the erasing process is executed. The recording data R (1, 2, 3) is assumed to be formed with a certain capacity, such as music and video, and the recorded area information includes, for example, about 128 data files. (For example, data for 128 songs in the case of music). In the present embodiment,
It is assumed that the recording data R (1, 2, 3) is continuously recorded from the recording start position in the unrecorded area. That is, for convenience, the recording data R (1, 2, 3) is shown at random positions in FIG. 4A, but when recording is performed in an unrecorded area based on the recorded area information, the recording data R (1, 2, 3) The data R (1, 2, 3) will be recorded continuously. That is, FIG.
Describes an example in which a start address and an end address are recorded. For example, it is assumed that only the end address at the time of final recording is stored, and that an address after the end address corresponds to an unrecorded area. It is also possible.

3. Recording Operation Transition FIG. 5 is a flowchart showing an example of processing transition when data is recorded in the disk drive device of the present embodiment. When it is detected that the disk 16 has been loaded (S001), for example, erase information, recorded area information, and the like recorded in the management information area of the disk 16 are read as initial processing when the disk is loaded, and stored in the memory 59. (S002). Thereby, the disk drive device 10 can grasp the management information of the loaded disk 16, and shifts to a state of waiting for a command from the host computer (S003).

When it is detected that the recording command is supplied from the host computer (S004), first, the erasure information is determined (S005). The recording area of the disk 16 corresponding to the designated address is erased (S006), and the recording data supplied from the host computer is recorded in the erased recording area (S007). Steps S005 to S005
The transition to 007 is performed in the same manner as the conventional recording operation control.
It is assumed that recording is performed by accessing a required recording area at random.

When the erase information is, for example, "1", the recorded area information shown in FIG. 4B is searched (S008). Then, the recording area corresponding to the address specified by the recording command is
It is determined whether or not the data has been recorded (S009). If it is determined that the area is an unrecorded area, a recording step of recording recording data in the unrecorded area is performed without performing the erasing step (S009). S010). This means that the recorded area (unrecorded area) has been updated.
The recorded area information is updated (S011). The update process shown in step S011 is performed on, for example, recorded area information stored in the memory 59 of the disk drive device 10.

If it is determined in step S009 that the recording area corresponding to the address specified by the recording command is a recorded area, another address is requested to the host computer, for example. It is determined that the error is not possible, and a required error message is returned to the host computer (S01).
2). That is, the fact that recording cannot be performed at the designated address is indicated to the host computer.

In the flowchart shown in FIG. 5, the transition particularly when the recording operation is performed has been described.
To update the recorded area information, an erase command is supplied,
It is also updated when an unrecorded area is formed by erasing recorded data. By the way, in the processing transition shown in the figure, an example in which the erase information is set to “0” is, for example, a disk that does not correspond to the format of the management information area shown in FIG. You can also. Therefore, when the erase information has a value other than “1”, for example, it can be considered that the erase information is not set in the specified recording area. In such a case, the erasing step,
What is necessary is just to perform a recording process and to record data.

As described above, the disk drive device 10 can execute the recording operation only by the erasing step when recording is performed on the unrecorded area, so that the data transfer rate with the host computer is improved. Will be able to do it. Therefore, it is useful when recording music, movies, etc. in real time. In addition, if the disk drive device 10 and the disk 16 of the present embodiment are used, a recording operation that realizes overwriting without erasing process can be performed without using a dedicated disk having a configuration for realizing overwriting. Can be executed.

Data recording is continued with the erase information set to "1". For example, when the unrecorded area runs out, the erase information is set to "0" at that point.
To indicate that the unrecorded area is gone. If the erase information is set to “0” and there is no unrecorded area, for example, if necessary data is erased and the recording area corresponding to this data becomes an unrecorded area, Alternatively, the erase information may be updated to “1” to indicate that an unrecorded area has been formed.

[0040]

As described above, the disk drive of the present invention detects the address of an unrecorded area,
When recording in an unrecorded area, the erasing step is omitted and only the recording step is performed. Therefore, the recording operation can be shortened, and the data transfer rate can be improved. This is useful for data that is desired to be recorded in real time, such as music and video. Further, by detecting the erase information as the management information of the disk, it is possible to determine whether or not the erasing step is to be performed on the disk and only the recording step is performed.

The recorded area management information is updated when data is recorded or erased, and when the data is recorded or erased. Therefore, the latest recorded area management information can always be recorded on the disc.

Further, in the recording medium of the present invention, erase information indicating the presence or absence of an unrecorded area and recorded area management information for managing a recorded area are recorded as the management information. Therefore, the unrecorded area formed on the recording medium can be indicated to the loaded disk drive, and the required recording operation control corresponding to the unrecorded area is executed for the disk drive. Will be able to do that.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a disk drive device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating the principle of erasing data recorded on a disk.

FIG. 3 is a diagram illustrating the principle of recording data on a disc.

FIG. 4 is a diagram illustrating a recording area of a disc.

FIG. 5 is a flowchart illustrating a recording operation transition.

[Explanation of symbols]

10 disk drive device, 18 optical head, 15
Objective lens, 30 drive control unit, 50 data transfer control unit, 59 memory, 61 bias magnet

[Procedure amendment]

[Submission date] July 27, 1999 (July 7, 1999
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 5

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device and a recording medium which improve a transfer rate by omitting a part of a recording process of a magneto-optical disk.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

In the management information area where required management information is recorded, the erasing step over the entire recording area is performed.
Erase information indicating whether or not execution has been completed, and recorded area management information for managing a recorded area in which data is recorded in the recording area are recorded to constitute a recording medium.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

The replacement information in the management information area stores address information of data replaced in the user data area. In the present invention, erase information and recorded area information are stored as management information in the management information area. Erase information is stored on disk 1
In the user data area No. 6, for example, “1” is set when the entire erase is performed. This is, for example, the case where the user has performed the erase command via the host computer using the erase command, or the case where the user has performed a format process, for example. That is, in the disk drive apparatus 10, if the erase information is determined to be "1", the recorded area information
User area other than the area where data is recorded
Is determined to have not been recorded, and the recording operation control described later can be executed.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

In the flowchart shown in FIG. 5, the transition particularly when the recording operation is performed has been described.
To update the recorded area information, an erase command is supplied,
Also performed when perform the erasure of data recorded unrecorded area is formed. By the way, in the processing transition shown in the figure, an example in which the erase information is set to “0” is, for example, a disk that does not correspond to the format of the management information area shown in FIG. You can also. Therefore, when the erase information has a value other than “1”, for example, it can be considered that the erase information is not set in the specified recording area. In such a case, the erasing step,
What is necessary is just to perform a recording process and to record data.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

Data recording is continued with the erase information set to "1". For example, when the unrecorded area runs out, the erase information is set to "0" at that point.
To indicate that the unrecorded area is gone. In addition, erase information is set to "0", the serial
Example when the recorded area information is not valid
For example, if the entire erase was performed, erase information
Update to “1” and all user data areas are unrecorded
May be indicated.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G11B 19/04 501 G11B 19/04 501G 20/12 20/12 27/00 D

Claims (5)

[Claims] In a disk drive device for performing a recording step after performing an erasing step for a recording position as a data recording operation, a laser beam is irradiated to record the data on a disk-shaped recording medium. A head means capable of reading data signals and applying a required magnetic field to a portion irradiated with the laser beam to record data on the disk-shaped recording medium; From the information area, in a recording area of the disc-shaped recording medium, a recorded area management information detecting means for detecting a recorded area management information for managing a recorded area in which data is recorded; Search means for searching for an unrecorded area based on the unrecorded area; Disk drive apparatus characterized by comprising a recording control means to perform the data recording by only recording process. 2. An erasure information detecting means for detecting, from a management information area of the disk-shaped recording medium, erasure information indicating whether or not the erasing step has been performed over the entire recording area of the disk-shaped recording medium, 2. The recording control device according to claim 1, wherein the recording control unit performs one of a recording operation by the recording step alone and a recording operation by the erasing step and the recording step based on the erase information. A disk drive device according to claim 1. 3. An updating means for updating the recorded area management information when the recording control means performs recording on an unrecorded area with the recorded unrecorded area as a recorded area. The disk drive device according to claim 1, further comprising: 4. The disk according to claim 1, further comprising updating means for updating the recorded area management information when recording data is erased in a recorded area of the disk-shaped recording medium. Drive device. 5. A management information area in which required management information is recorded, erase information indicating whether or not the erasing step has been performed over the entire recording area, and a record in which data is recorded in the recording area. Recording area management information for managing a recorded area, and a recording medium.