KR20000034857A - servo pattern writing method of high-capacity magnetic media driving apparatus for self-servo writing and device for the same - Google Patents

Abstract

PURPOSE: A servo pattern recording method is provided to write or read data on the basis of a servo pattern, which is recorded by a driving apparatus itself, without recording an embedded servo pattern on a record medium. CONSTITUTION: In a servo pattern recording method, if a self servo writing operation is requested, a magnetic head is transferred to a position according to corresponding data on the basis of head transfer data which is stored in a ROM(S101,S103). Data remaining on a magnetic disk is deleted(S104), and whether an erase operation is completed with regard to all regions(S105). If an erase operation is completed with regard to all regions, the magnetic head is returned to an initial position(S107). If an erase operation is not completed with regard to all regions, A head position is shifted by a predetermined interval(S106), and the steps(S104,S105,S106) are repeated until the erase operation is completed with regard to all regions.

Description

Servo pattern writing method of high-capacity magnetic media driving apparatus for self-servo writing and device for the same

The present invention relates to a method for recording information on a high capacity magnetic recording medium. In particular, the driving device itself is a servo away from the conventional method of recording an embedded servo pattern on a recording medium using a special device called a servo writer. The present invention relates to a servo pattern recording method of a high-capacity magnetic recording medium driving apparatus for self-servo writing for recording a servo pattern in order to record a pattern and to write or read data based thereon.

In general, typical storage media that are commercially available as magnetic recording media using an embedded servo method may include a hard disk and a high capacity floppy disk.

In the magnetic recording medium described above, that is, the magnetic screen of the disk (1) on a hard disk or a high capacity floppy disk, as shown in FIG. 1, the servo area indicated by reference numerals S _{1 to} S _k and reference numerals D ₁ to. It is divided into a data area indicated by D _k , and the servo information stored in the servo areas S _{1 to} S _k is magnetic along the tracks indicated by reference numbers T1 to Tn to write data to or read data from a disc. It refers to position recognition reference data of the magnetic head necessary for the head to move accurately. Typically, a hard disk or a high capacity floppy disk has about 100 servo areas.

At this time, a representative method of displaying the servo information in the servo area is an embedded servo method, a typical servo pattern is as shown in FIG.

FIG. 2 is a schematic diagram of a servo pattern according to the embedded servo method, and includes a servo sync pattern, a servo address mark (SAM) pattern, an index pattern, a gray code pattern, and bursts A and B. FIG. , C, D.

The servo synchronization pattern is an area for searching for a servo address mark, which is the first part of the servo area. The servo address mark (SAM) uses a special pattern that cannot occur in the data section.

The timing of the servo sector is based on the time when the servo address mark is detected. The gray code is information for indicating the position of a track on a disc, and the burst signal is information for indicating the position of a head within a track.

Therefore, a magnetic disk such as a hard disk or a high-capacity floppy disk is the most important parameter for performing its role as a data recording medium. If the servo information is damaged or lost, the magnetic head cannot move along the track. The function will be lost.

Therefore, in the case of a hard disk, a servo writing process of recording servo information on the hard disk is performed during the production process of a hard disk driver, and a high capacity floppy disk is performed during a floppy disk production process. .

Since the servowriting process records servo information for controlling the position of the head, as described above, the performance of not only track search but also track tracking performance is affected. This is a servowriting process during track search and track tracking control. This is because the recorded servo information is used.

Therefore, in the magnetic disk drive apparatus using the embedded servo method as described above, the magnetic disk used for the drive apparatus has a servo pattern having track information for recording data and position information for accurately positioning the head on a predetermined track. Since this must be provided essentially, a servo pattern writer capable of recording a servo pattern is an essential equipment.

Referring to FIG. 3 attached to the configuration of the servo pattern writer for performing the above-described servo track writing process, FIG. 3 is an exemplary configuration diagram of a servo writer of a general high-capacity floppy disk, and is provided at an end of an actuator according to an input control signal. A voice coil motor 46 for transferring the magnetic head 45 provided therein, and an optical encoder for sensing a transfer distance of the magnetic head 45 according to the driving of the voice coil motor 46. 44, an R / W channel 42 providing a servo pattern flowing into the magnetic head 45 side for recording data on the surface of the floppy magnetic disk 38 through the magnetic head 45, and A spindle motor 35 for rotating the floppy magnetic disk 38 by a drive signal to be provided; and a motor driver 34 for providing a drive signal to the spindle motor 35 according to an input control signal; And a hard magnetic disk 37 which is provided on a rotating shaft for providing the rotational force of the spindle motor 35 to the floppy magnetic disk 38 and rotates at the same speed as the floppy magnetic disk 38, and for recording a servo pattern. The reference clock generator 33 generating a reference signal and the reference signal generated by the reference clock generator 33 according to a control signal are recorded on the hard magnetic disk 37 or the hard magnetic disk 37. A reference head 36 which reads the reference signal recorded in the reference signal, a servo pattern generator 31 which stores the servo pattern to be recorded on the floppy magnetic disk 38 and outputs the stored data according to the input control signal; And a main controller 30 for controlling the components to record the servo pattern on the floppy magnetic disk 38.

The user interface 32, which is not mentioned in the configuration description, includes a screen display unit and an input unit for inputting a signal for adjusting the servo writing operation so that a user can check and control the operation of the servo writer. The displayed DAC is a D / A converter for converting a digital signal generated by the main controller 30 into an analog signal and providing the same to the voice coil motor 46. The R / W channel controller, which is not given a reference number, It performs a function of matching the synchronization of the servo pattern information provided to the magnetic head 45 side through the R / W channel 42.

Referring to the preferred operation of the servo writer of the high capacity floppy disk configured as described above, the main controller 30 receives the servo writing operation adjustment signal generated by the user interface unit 32 to the servo pattern generator 31. The corresponding servo pattern is accessed from among the recorded servo patterns.

Thereafter, the main controller 30 inputs the servo pattern accessed by the servo pattern generator 31 to the R / W channel controller. At this time, the main control unit 30 retrieves the position information of the magnetic head output from the optical encoder 44 and adjusts a control signal applied to the voice coil motor 46 to adjust the servo pattern on the floppy magnetic disk 38. Determine the initial position to be recorded first. Typically, the initial position is located at zero track.

In addition, in order to accurately synchronize the timing of the servo pattern to be recorded in each track, the main controller 30 receives the reference signal generated by the reference clock generator 33 through the reference head 36 through the hard magnetic disk 37. It is used to control the rotation speed of the disk and to use it as a synchronization signal of the servo pattern recorded on the floppy magnetic disk 38.

Therefore, after the rotational speed of the spindle motor 35 maintains the constant speed and the reference signal is recorded correctly, the servo pattern accessed from the servo pattern generator 31 through the R / W channel controller is converted into the floppy magnetic disk ( The main controller 30 receives the position information of the magnetic head 45 output from the optical encoder 44 so that the magnetic head 45 can move to the position of the next track. The distance is calculated to adjust the control signal input to the voice coil motor 46.

The above operation is repeated until the servo pattern is recorded for the entire track (however, the reference signal is written to the hard magnetic disk is a single operation).

Accordingly, about 100 servo regions are formed in each track through the above-described process, as shown in FIG. 1, and embedded servo information recorded in the servo region is shown in FIG. 2. It has a format as is, but look at this example as shown in Figure 4 attached.

4 is an example of a case where information is not loaded in the burst C region as an example of the servo pattern in the embedded system.

However, since the price of the servo pattern writer as shown in FIG. 3 is very expensive, there is a limitation in the goal of reducing the production cost of the magnetic disk drive, and maintenance of the servo pattern on the magnetic disk is damaged. In order to solve this problem, a separate device such as a servo pattern light has to be used.

Moreover, in the case of a high capacity floppy disk, the servo pattern recording method proposed up to now is largely divided into an optical method and a magnetization method. In the case of the magnetization method, the servo pattern recorded on the surface of the disk is affected by the influence of the surrounding magnetic field (near or large). When the magnetic field is formed around the system, etc. are frequently lost, there is a problem that the floppy disk is no longer used and thus discarded.

The reason is that in the drive of the high capacity floppy disk, the voice coil motor was used as the motor for the transfer of the magnetic head in consideration of the very narrow track width. Because closed loop control method should be used, it is impossible to transfer the magnetic head when the servo pattern is damaged or lost.

On the other hand, in the optical servo pattern recording method, there is no possibility of damage or loss of the servo pattern formed on the disk surface by laser processing, but a drive price increase factor due to the optical control system for recognizing the optical servo pattern occurs. Additional problems have arisen.

In order to solve the above-mentioned problems of the related art, by the same applicant and inventor as the present invention, a drive system of a magnetic recording medium using an embedded servo method without the help of an external device is itself a servo for position control on the magnetic recording medium. A self-servo writing method of a magnetic recording medium drive device capable of recording a signal has been proposed.

Briefly describing the above-described self-servo writing technique, the head conveying apparatus is transferred based on index pulses generated from the driving means for driving the recording medium while the head conveying apparatus is transferred through a standard other than the servo pattern (open loop control, position sensing control). In this manner, the servo pattern stored in the memory means is recorded.

However, even if a technique for positioning the head at an arbitrary position on the magnetic recording medium in which the servo pattern does not exist in the application of the self-serving writing method proposed by the same applicant and inventor as the present invention, the existing data recording method or Since the operating system has a limitation in recording servo patterns that need accurate matching, a technical necessity arises that a data recording method suitable for the self-servo writing method is required.

The reason for this is that, as in the servo pattern shown in FIG. 5, a sync signal, a burst signal, an index, or the like must maintain a very precise matching relationship between tracks. In the servo writer, for the matching relationship, the rotation speed of the disk is used and the synchronization pattern of the servo pattern recorded on the floppy magnetic disk 38 by using the structural means indicated by reference numerals 33, 36 and 37 of FIG. However, mounting such a configuration in the high-capacity floppy disk drive has a problem that the production value actually decreases as the volume of the floppy disk drive increases.

In addition, in order to perform the self-servo writing method by the magnetic recording medium driving device itself, there is a problem that the current operating system of the magnetic recording medium driving device is impossible, and furthermore, the operating system of the servo lighter cannot be borrowed.

The object of the present invention proposed by the above technical necessity is to move away from the conventional technique of recording an embedded servo pattern on a recording medium by using a special device called a servo writer, and the driving device records the servo pattern by itself. The present invention provides a method and apparatus for recording a servo pattern of a high-capacity magnetic recording medium driving device for self-servo writing for recording a servo pattern so that the device can record the servo pattern and write or read data based thereon.

1 is an exemplary view of region division on a magnetic disk;

2 is a diagram illustrating an embedded servo information format;

3 is an exemplary configuration diagram of a servo writer of a general high capacity floppy disk;

4 is an example of a servo pattern in an embedded scheme;

5 is a diagram illustrating an embedded servo information format when applying a servo pattern between a plurality of adjacent tracks.

6 is an exemplary configuration diagram of a recording medium driving apparatus having a self servo writing function;

7 is an exemplary block diagram of a track flow controller for performing hybrid control;

8 is an exemplary operation timing diagram for explaining a method of forming a reference track using an index pulse and an FG signal of a spindle motor;

9 and 10 are flowcharts illustrating a servo pattern recording method of a high-capacity magnetic recording medium driving apparatus for self-servo writing according to the present invention;

11 is an exemplary configuration diagram of a magnetic head used in the present invention.

12 is an exemplary diagram for describing a technical spirit of an embodiment according to the operation sequence illustrated in FIGS. 9 and 10.

13 is an exemplary view of a state of forming an n-1 th track on the surface of a magnetic disk through a first high capacity head;

14 is an exemplary view of a state in which the magnetic head is moved by the half-track fine;

FIG. 15 is an exemplary view of a state in which an n-1th track is formed on the rear surface of a magnetic disk through a second high capacity head based on a servo pattern read through the first high capacity head in the head position of FIG. 14;

16 is an exemplary diagram for describing a data flow process in a servo pattern writing operation;

17 is an exemplary diagram of a time delay occurring during a data reading operation.

18 is a diagram illustrating a change in a data signal according to a threshold value change;

19 to 29 are sequential diagrams for explaining a process of recording a burst signal superimposed on two tracks of an embedded servo pattern.

<Description of the symbols for the main parts of the drawings>

310: magnetic head 320: spindle motor

330: micro step motor 340: control unit

350, 360: Digital-to-Analog Converter 370, 380: Micro Step Motor Driver

390: read / write circuit 400: spindle motor drive

410: interface unit 420: memory unit

450: (flexible) magnetic disk

Features of the present invention for achieving the above object of the present invention, the first head and the second head consisting of the surface and the back surface of the magnetic disk which rotates by the spindle motor moving the same interval in conjunction with each movement A method of operating in a magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk on which servo information is provided which provides a criterion for controlling the transfer of the magnetic heads respectively located in the apparatus. A first process of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information, and a second process of deleting remaining data for the entire disk area from the position of the transferred head; If the remaining data is deleted for the entire disk area through the second process, the first process A third process of returning to the position of the magnetic head, and during the one rotation period of the spindle motor at the position of the magnetic head transferred through the third process in synchronization with the specific signal generated from the spindle motor. A fourth process of recording the set servo pattern to form a reference track, a fifth process of transferring the head by a predetermined track interval based on the already recorded servo pattern, and a predetermined track interval through the fifth process And a sixth process of recording the servo pattern of the next track while reading the servo pattern already recorded at the position of the transferred head and performing time correction.

An additional feature of the present invention for achieving the above object of the present invention is to further include a seventh process of repeatedly performing the fifth process and the sixth process until leaving the area where the track can be formed.

An additional feature of the present invention for achieving the above object of the present invention is that the method further includes an eighth process of forming a data area when recording a servo pattern.

As another additional feature of the present invention for achieving the above object of the present invention, the track transfer method of the magnetic head in the first to third processes is a position control of the step motor according to the micro step control and the hybrid control method. It is to use the open loop method according to the method.

In another additional aspect of the present invention for achieving the above object of the present invention, the second process includes a first step of performing a DC erasure at a position where the first and second heads are present, When the DC erase operation is performed in step 1, the method includes a second step of transferring the head at predetermined intervals until the DC erase operation is performed on the entire area of the magnetic disk.

A further additional feature of the present invention for achieving the above object of the present invention is that the feeding interval of the head in the second step corresponds to one track width or head head width or half track width.

As a further another feature of the present invention for achieving the object of the present invention described above, the sixth step is a servo pattern that has already been recorded at the position of the first head transferred by a predetermined track interval through the fifth step. The first step of reading, the second step of performing time delay compensation while converting the servo pattern read in the first step into digital data, and the data converted into digital data in the second step are magnetic disks. And a third step of writing through the second head at any position on the image.

Another additional feature of the present invention for achieving the above object of the present invention is that the first to third steps are made in real time.

In another additional aspect of the present invention for achieving the above object of the present invention, the predetermined track interval of the head transferred through the fifth process is to maintain the interval within 0.5 track intervals or maintain the 0.5 head interval. .

As another additional feature of the present invention for achieving the object of the present invention described above, the second step includes a reference threshold set in advance to convert the head signal output from the head into digital data. To increase or decrease in proportion.

As another additional feature of the present invention for achieving the above object of the present invention is to perform repeatedly from the first step to the third step until it leaves the area capable of forming a track for the entire area of the magnetic disk, 2n (n is a natural number) in the first to third steps, the first head performs the function of the second head and the second head performs the function of the first head.

As another additional feature of the present invention for achieving the above object of the present invention, the track transfer method of the magnetic head in the fifth process is a step motor position control and servo pattern recognition according to a micro step control and a hybrid control method. It is to use closed loop control method through.

In another additional aspect of the present invention for achieving the above object of the present invention, the hybrid control method may include a rotor inside a stem motor having an A phase and a B phase based on a preset microstep adjustment signal. A first step of performing a micro-step driving by applying a sinusoidal sine wave on A and a cosine sine wave on B to rotate by an angle; and the step motor when the head stops moving during the transfer operation of the magnetic head through the first step. A second step of performing an inherent position locking control, and a third step of simultaneously performing the control of the first step and the control of the second step during one sampling period when the head is moved at a fine interval from the stop position of the head. There is.

As a further another feature of the present invention for achieving the above object of the present invention, the sixth step is a servo pattern that is already recorded at the position of the first head transferred by a predetermined track interval through the fifth step. A first step of reading, a second step of performing time delay compensation while converting the servo pattern read in the first step into digital data, and generating a new servo pattern according to preset servo information The third step, the fourth step of merging the data converted into the digital data in the second step and the servo pattern generated in the third step, and the data merged through the fourth step are random positions on the magnetic disk. A fifth step of recording the data through the second head, and the data merged through the fourth step from the second head through the fifth step. Among there to via the first head including a sixth step of writing a servo pattern on a portion of the servo pattern from there.

Another additional feature of the present invention for achieving the above object of the present invention is that the first to sixth step is made in real time.

As another additional feature of the present invention for achieving the above object of the present invention is to perform repeatedly from the first step to the sixth step until it leaves the area capable of forming a track for the entire area of the magnetic disk, 2n (n is a natural number) in the first to sixth steps, the first head performs the function of the second head and the second head performs the function of the first head.

Another feature of the present invention for achieving the above object of the present invention comprises a first head and a second head, and interlocked with each other to move the same distance and to face the front and rear surfaces of the magnetic disk, respectively. The first head and the second head each have a high capacity head for a high capacity magnetic disk and a standard type standard head, and the high capacity heads are disposed in a space between the standard type standard heads maintaining a predetermined distance. It is to use a magnetic head having a shape having a predetermined separation distance.

An additional feature of the present invention for achieving the above object of the present invention is that the separation distance between the high-capacity heads has a relatively small distance as compared with the separation distance between the standard heads.

Another feature of the present invention for achieving the above object of the present invention is a first head having a first high capacity head for a high capacity magnetic disk and a standard first standard head and a second high capacity for a high capacity magnetic disk. And a second head having a standard second standard head, the magnetic head being positioned on the surface and the rear surface of the magnetic disk rotated by the spindle motor, moving the same distance in interlocking movement with each other. A method of operating in a magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk on which servo information providing a reference for controlling a transfer is recorded: A first process of transferring to an arbitrary position on the magnetic recording medium based on the set head transfer information; The second process of performing DC erasing at the position where the standard first and second standard heads of the magnetic head exist through the first process, and if the DC erasing operation is performed in the second process, And a third process of repeatedly carrying out the second process by transferring the head at a predetermined interval until the DC erase operation on the region is performed.

As an additional feature of the present invention for achieving the above object of the present invention, the feed distance of the head in the third process corresponds to the head width of the standard type standard head, or a standard type track corresponding to the standard type standard head. The width corresponds to the width of the standard type half track corresponding to the standard type head.

Another feature of the present invention for achieving the above object of the present invention comprises a first head and a second head, and the surface of the magnetic disk which rotates by a spindle motor moving the same interval in conjunction with their respective movements; A magnetic disk drive system for performing data reading / writing operations through a magnetic head in a data area of a magnetic disk on which servo information is provided which provides a reference for controlling the transfer of magnetic heads respectively located on the back side thereof: The magnetic head is provided as a head feed means according to a closed loop control method through position control of a step motor and servo pattern recognition according to a micro step control and a hybrid control method; The magnetic head is provided with a standard standard head in addition to the high capacity head; A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information; and using the standard type standard head to store remaining data for the entire disk area from the position of the conveyed head. In the second step of deleting, and when the remaining data is deleted for the entire disk area through the second step, after returning to the initial position, the spindle motor is synchronized with the index pulse and the FG signal generated by the spindle motor. A third step of forming a reference track by recording a preset servo pattern during one rotation period; and a fourth step of transferring the first high capacity head by a predetermined track interval based on the recorded servo pattern; Already recorded at the position of the first high-capacity head fed by the predetermined track interval in step 4. A fifth step of reading the beam pattern, a sixth step of performing time delay compensation while converting the servo pattern read in the fifth step into digital data, and data converted into digital data in the sixth step Performing a seventh step of recording via the second high capacity head at an arbitrary position on the magnetic disk; The fifth to seventh stages are processed in real time, and the transfer interval of the magnetic heads is maintained within 0.5 high-capacity track intervals during the process from the fourth to seventh stages. Control the head conveying means; The fourth to seventh steps may be repeatedly performed until the track forming area of the magnetic disk leaves the region where the track can be formed, and the number of repetitions of the fourth to seventh steps 2n-1 (n is Natural number) to perform the function of the first high capacity head in the second high capacity head and the function of the second high capacity head in recording the servo pattern on the magnetic recording medium by itself.

Another feature of the present invention for achieving the above object of the present invention comprises a first head and a second head, and the surface of the magnetic disk which rotates by a spindle motor moving the same interval in conjunction with their respective movements; A magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk in which embedded servo information is provided, which provides a reference for controlling the transfer of the magnetic heads located on the rear surface thereof. The magnetic head is provided as a head feed means according to a closed loop control method through position control of a step motor and servo pattern recognition according to a micro step control and a hybrid control method. The magnetic head is provided with a standard standard head in addition to the high capacity head; A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information; and using the standard type standard head to store remaining data for the entire disk area from the position of the conveyed head. In the second step of deleting, and when the remaining data is deleted for the entire disk area through the second step, after returning to the initial position, the spindle motor is synchronized with the index pulse and the FG signal generated by the spindle motor. A third step of forming a reference track by recording a preset servo pattern during one rotation period; and a fourth step of transferring the first high capacity head by a predetermined track interval based on the recorded servo pattern; Already recorded at the position of the first high-capacity head fed by a predetermined track interval in step 4 A fifth step of reading a servo pattern, a sixth step of performing time delay compensation while converting the servo pattern read in the fifth step into digital data, and a new servo pattern according to preset servo information The seventh step of generating the data, the eighth step of merging the data converted into the digital data in the sixth step and the servo pattern generated in the seventh step, and the data merged through the eighth step on the magnetic disk The ninth step of recording through the second high-capacity head at an arbitrary position, and the data merged through the eighth step in the second high-capacity head through the ninth step, and recording through the second high-capacity head. If the information of the servo pattern is the embedded burst mode, the burst of the servo pattern at the corresponding position through the first high capacity head. Perform a tenth step of recording an area; The fifth to tenth stages are processed in real time, and the transfer intervals of the magnetic heads are maintained within 0.5 high-capacity track intervals while performing the processes from the fourth to tenth stages. Control the head conveying means; Repeat steps 4 through 10 until the entire track is out of the trackable area, and the number of times of repeating the steps 4 through 10 is 2n-1 (n is Natural number) to perform the function of the first high capacity head in the second high capacity head and the function of the second high capacity head in recording the servo pattern on the magnetic recording medium by itself.

The above object and various advantages of the present invention will become more apparent from preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

First, prior to describing the present invention, a brief description of the recently proposed self-servo writing method, the technical spirit of the self-servo writing method is the most important configuration or parameter of the magnetic head of the servo light device shown in FIG. The highly precise moving means 44, 46, 40 of the 45, the reference signal generating means 33, 36, 37 and the servo pattern generating means 31, 42 are components of the magnetic disk drive. By doing this, the servo pattern, that is, the position information can be recorded on the magnetic disk without the servo write.

Therefore, the present invention can be said to how to properly control the internal configuration for the application of the self-servo writing method to achieve the purpose of self-servo writing.

In addition, in the present invention, when the self-servo writing method is applied, the head is positioned at an arbitrary position on the magnetic recording medium on which the servo pattern does not exist, and in the case of using a step motor that does not require the feedback requirement in order to maintain accurate head feeding. In other words, the control method for head removal of high-capacity magnetic media driving apparatus using step motor and the device proposed by the same applicant and inventor as the present invention device for the same) ".

The head feed control method of the high capacity magnetic recording medium driving apparatus using the step motor described above will be briefly described. The step control method is applied, and the hybrid control concept is introduced to overcome the nonlinearity of the static friction force due to the characteristics of the step motor. In this case, the term hybrid is arbitrarily named by the present inventors.

First, an example of a self-servo writing apparatus using a micro-step control and a hybrid control method to which the present invention is applied will be described with reference to FIG. 6.

FIG. 6 is an exemplary configuration diagram of a recording medium driving apparatus having a self-servo writing function. The magnetic head 310, the spindle motor 320, and the micro step motor 330 are shown in FIG. ), A controller (Micro Controller) 340, the first digital-analog converter 350, the second digital-analog converter 360, the first step motor driver 370, the second step motor driver 380 ), A read / write circuit unit 390, a spindle motor driver 400, an interface unit 410, and a memory unit 420.

Looking at the brief function of the configurations, the magnetic head 310 is for reading and writing data from the magnetic disk 450. In addition, the spindle motor 320 is a motor for rotating the magnetic disk 450 at a constant speed, and the micro step motor 330 is the magnetic head 310 between the track and the track of the magnetic disk 450. As a motor for finely moving the linearly, micro step control using a two-phase step motor is possible.

The controller 340 is to organically control the overall configuration including the magnetic head 310, the spindle motor 320, and the micro step motor 330, through the magnetic head 310 Read the position information signal read from the magnetic disk 450 to calculate the track-to-track movement position of the magnetic head 310 and generate a digital phase control signal for driving the micro step motor 330 based on the calculation. The controller generates a control signal for driving the spindle motor 320, and generates a control signal for reading or writing data to the magnetic disk 450 through the magnetic head 310.

In addition, the first micro step motor driver 370 controls the current flow of the first phase for driving the two-phase micro step motor 330 according to the output signal of the first digital-analog converter 350. The second micro step motor driver 380 controls the current flow of the second phase for driving the two-phase micro step motor 330 according to the output signal of the second digital-analog converter 360. It is to.

The read / write circuit unit 390 writes data to the magnetic disk 450 or writes the data recorded on the magnetic disk 450 through the magnetic head 310 according to a control signal of the controller 340. By outputting a signal for reading, to control the reading and writing of the magnetic head (310).

The spindle motor driver 400 is for driving the spindle motor 320 according to a control signal of the controller 340, and the interface unit 410 is a data between a computer (not shown) and the controller 340. It is for communication.

The interface unit 410 is for data communication between a peripheral device such as a computer and the control unit 340, and the memory unit 420 stores a program for temporarily storing the various data and organically controlling the entire system. The controller 340 is provided to support the controller 340 and is configured by combining memories such as a RAM and a ROM.

In addition, the ROM stores data for generating a servo pattern.

Briefly looking at the control method of the step motor in the recording medium drive device having a self-servo writing function configured as described above, a step motor for performing micro-step control based on the data on the track width of the predetermined high-capacity magnetic disk Set the adjustment signal.

At this time, in order to rotate the rotor inside the step motor having A phase and B phase by a predetermined angle based on the micro step adjustment signal set through the above process, a sinusoidal sinusoid on A phase and a cosine sinusoid on B phase are applied to the micro The step driving is performed, but the position locking control unique to the step motor is performed when the feeding stops of the head during the feeding operation of the magnetic head.

During the micro step control, when the head is moved at a fine interval from the stop position of the magnetic head, when the driving force of the step motor is generated during one sampling period, a torque equal to or greater than the stop frictional force is generated, and a time point out of the stop state From within a predetermined time from to generate a reverse torque having a predetermined value smaller than the torque previously generated, but having a reverse phase, it is performed during one sampling period to perform the control according to Equation 1 below.

However, in Equation 1, Td is a time delay, TS is a sampled state, vector u is a position error, k is a torque constant of the step motor, and Ia and Ib of the vector x depend on the input current of the step motor. Control value.

The configuration of the hardware according to Equation 1 as described above is shown in the accompanying FIG. 7, the operation of which is carried by the same applicant and inventor as the present invention, the head transfer of the high capacity magnetic recording medium driving apparatus using the step motor. Control method and apparatus thereof are described in detail and thus will be omitted.

Therefore, the technique of finely moving the head by using the micro-step control method and the hybrid control method as described above is already proposed by the same applicant and inventors as the present invention, which achieves the present invention to be described below. It is the technical basis for this.

That is, the present invention is substantially established using the transfer technology of the head as described above, and the present invention is substantially divided into two types. Firstly, the self-servo lighting method proposed by the same applicant and inventor as the present invention is used. It is about the operating system for the overall complement, and the second is about the compensation and following of the Miss Alignment for matching the servo pattern between each track.

In addition, the formation of a reference track is very important to achieve the purpose of compensation and tracking of the misalignment for matching the servo pattern between tracks according to the present invention, which is proposed by the same applicant and inventor as the present invention. Description of "Reference servo pattern writing method of high-capacity magnetic media driving apparatus for self-servo writing and device for the same" Use ideas

A brief description will be made with reference to FIG. 8 attached to the technical idea applied in the "a method and apparatus for generating a reference servo pattern of a high-capacity magnetic recording medium driving device for self-serving lighting," wherein a spindle is provided for rotation of a magnetic disk. The pre-stored servo pattern is recorded based on the index pulse and the frequency generation signal generated by the characteristics of the spindle motor in which the motor rotates.

That is, the point of occurrence of the index signal is a reference point for starting the recording of the servo pattern, and is synchronized with the zero cross point of the FG signal generated after this (the zero cross point at this time is a detection point in the trend of increasing FG signal). The servo pattern is recorded for a certain period of time.

In this manner it is possible to replace the constituent means denoted by reference numerals 33, 36, 37 of FIG.

Accordingly, the present invention relates to the above-described technique related to the method and apparatus for generating a reference servo pattern of a high-capacity magnetic recording medium driving device for self-serving, and a method of controlling the head feed of the high-capacity magnetic recording medium driving device using a step motor; It is proposed based on the technology related to "the device."

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

9 and 10 are flowcharts illustrating a servo pattern recording process of a high-capacity magnetic recording medium driving apparatus for self-servo writing according to the present invention.

In step S101, the controller 340 determines whether there is a request for a self-servo writing operation on the host side through the interface unit 410. If it is determined that the request for a self-servo writing operation does not exist, the process proceeds to step S102. Perform disk drive operations.

If it is determined in step S101 that there is a request for a self-servo writing operation on the host side, the process proceeds to step S103 and the magnetic head 310 is referred to the position according to the data based on the head feed data stored in the ROM. Transfer to position. At this time, since the micro step motor 330 is used as shown in FIG. 6, the micro step motor 330 is moved in a reset state to a reference position stored in advance by adjustment of a drive signal according to the open loop control.

Subsequently, in step S104, the data remaining on the magnetic disk is deleted. The reason for this is to prevent an error from occurring in the newly recorded servo information by the remaining data, and to erase DC for all tracks on the disk. Will be implemented.

In this case, the present invention uses a magnetic head configured as shown in FIG. 11 attached thereto. The magnetic head 310 according to the present invention includes both standard heads SH1 and SH2 and high capacity heads HH1 and HH2. In this configuration, the standard head and the high-capacity head are formed in pairs to correspond to the front and back surfaces of the floppy disk.

Therefore, in step S104, DC erasure is performed on all tracks on the disc using the standard heads SH1 and SH2.

Typically, since the track width of the standard floppy disk is about 140 to 150 mu m and the track width of the high capacity floppy disk is about 10 mu m, the size of the standard heads SH1 and SH2 is 130 mu m and the high capacity heads HH1 and HH2. ) Is 8 µm.

Therefore, as shown in FIG. 11 to which the magnetic head used in the present invention is attached, the reason for having both the standard heads SH1 and SH2 and the high capacity heads HH1 and HH2 is to speed up the process of step S104. In addition, both standard and high-capacity floppy disks can be recognized or used by a single drive.

As the above-described process of step S104 is performed, the remaining data is deleted. In step S105, the controller 340 determines whether the remaining data erasing operation is completed for the entire area of the disc. If it is determined in step S105 that the data erase operation for the entire disk area has not been completed, the process proceeds to step S106. In step S106, the head is transferred to an area after the area where the erase operation was performed in step S104. The 310 is transferred to a predetermined interval.

The head feed interval in step S106 is about 140 to 150 mu m, which corresponds to the track width of a typical standard floppy disk. In addition, when the finer erase operation is to be performed, about 70 to 75 μm corresponding to the half track is used as the head feed interval in step S106.

On the other hand, if it is determined in step S105 that the remaining data erase operation has been performed for the entire area of the disc, the process proceeds to step S107. In step S107, the head is moved to the initial position where the head is located through the process of step S103. The head 310 is returned.

When the magnetic head 310 returns to the initial position through the process of step S107, in step S108, after accessing the servo pattern stored in the ROM, the process proceeds to step S109 to determine whether an index pulse is generated. .

If it is determined in step S109 that an index pulse has occurred, the flow proceeds to step S110 to determine whether there is a zero cross point of the FG signal generated by the spindle motor 320. In addition, it is determined that zero cross exists in step S110. In step S111, the servo pattern accessed in step S108 is recorded in synchronization with the FG signal.

Thereafter, in step S112, it is determined whether a new index pulse is generated in addition to the index pulse determined in step S109. When it is determined that no new index pulse is generated, the process proceeds to the step S110 again, and when it is determined that a new index pulse is generated. Proceed to step S113.

Referring to FIG. 8 to which the above processes from step S109 to step S112 are briefly described, FIG. 8 is a simplified waveform example for explaining a reference servo pattern generation process of a high-capacity magnetic recording medium driving apparatus for self-servo writing. As a characteristic of the spindle motor, if the rising edge of the index pulse generated once corresponding to one rotation of the motor occurs, the FG signal is generated after the micro-time.

At this time, since the process of generating the index pulse and the FG signal or the structure of the spindle motor is a known matter, detailed description thereof will be omitted. However, in the present invention, 96 FG signals are preferably applied from the rising edge to the rising edge of the index pulse. Design the spindle motor so that it can be generated.

Therefore, in step S109 illustrated in FIG. 9, it is determined whether the rising edge time of the index pulse is generated by the rotation operation of the spindle motor, and when it is determined that the rising edge time of the index pulse is generated, the process proceeds to step S110. .

In step S110, it is determined whether a zero cross point of 96 sine wave FG signals (designed by the necessity of the present invention) generated after a minute time from the rising edge of the index pulse is generated by the characteristics of the spindle motor. The servo pattern write control signal is generated in synchronization with the zero cross point.

At this time, the servo pattern write control signal generated in synchronization with the zero cross point of the FG signal has the form of a pulse, the period of which is the same as the period of the FG signal, and the interval of the logic high state of the servo pattern write control signal. The length is smaller than the half period of the FG signal. That is, since the area in which the servo pattern is generally written is designed to be relatively small compared to the data area, the servo pattern write control signal is therefore varied according to the design pattern of the servo pattern.

When the servo pattern write control signal is changed from a logic low state to a high state, the read / write circuit unit 390 of FIG. 6 attaches the servo pattern previously accessed in step S108 of FIG. 9 through the process of step S111. When the servo pattern write control signal is changed from a logic high state to a low state, the recording operation of the servo pattern is stopped.

Accordingly, a total of 96 servo pattern areas are formed in one track, and the 96 areas divided by the servo pattern areas are set as data areas.

Therefore, when it is determined that a new index signal is generated in step S112, a total of 96 servo regions are formed in one track. Subsequently, in step S113, the servo pattern recorded through the process of step S111 is read. The magnetic head 310 is moved within 0.5 track intervals or by 0.5 head intervals.

The reason for transferring the magnetic head 310 while reading the servo pattern in step S113 is to perform the open loop control by the micro step motor control, but to maintain the precise movement of the head. If the amount of information in the pattern is 50% of the amount of information read through the head during normal operation, it can be determined that the half head interval is accurately transferred.

Therefore, the closed loop control of the stepper motor is performed by the servo pattern. Of course, the microstep control and the hybrid control technology underlying the present invention should be mixed.

Therefore, in step S114, it is determined whether the magnetization amount of the servo information read in step S113 is within the threshold range, and if it is determined that the threshold range is within, the process proceeds to step S115 in FIG.

In step S115, a servo pattern different from the servo pattern read in step S106 of FIG. 9 is accessed from the ROM, and in step S116, a servo pattern recorded through the first high capacity head HH1 is read. Since the servo pattern is a state in which the hard track is transferred through the steps S113 and S114, the servo information actually read through the first high capacity head HH1 extends to a half track or half head.

This means that if the data is recorded for all tracks and the data is read in a state where the heads are superimposed on two adjacent tracks, the data cannot be recognized. However, as shown in FIG. If you are reading the information of the half track indicated by reference number HT with respect to, since there is no information in the area referred to by reference number HNT, the information read from the head is the size of the information and signal recorded in track n + 1. This is because there is no damage to data even if the half track information is read.

The servo pattern read in step S116 performs time delay compensation while being converted into digital data through the process of step S117. The time delay compensation operation will be described in detail later.

After performing the compensation according to the time delay in step S117, in step S118, the data of the servo pattern accessed in the step S115 and the step S116 and the read servo pattern are merged to form a servo pattern of a new track, and the process proceeds to step S119. In step S119, the servo pattern generated in step S118 is recorded using the second high capacity head HH2.

Referring to FIGS. 13 to 15 attached to the process from step S113 to step S119, FIG. 13 is a state in which the n-1th track is formed on the surface of the magnetic disk through the first high capacity head HH1. By way of example, under the assumption that the reference track is the nth track on the surface of the magnetic disk, the reference track Tn, which is the nth track in FIG. 1, is the track located on the innermost surface of the magnetic disk. It shows the state in which the next track is formed in succession to the reference track after being formed on both the front and back surfaces.

Therefore, when the magnetic head is moved finely, i.e., by the heart track interval, through the processes of steps S113 and S114, it is as shown in FIG.

Subsequently, when the above-described process is performed from step S115 to step S119, tracks corresponding to the n-1th tracks formed on the surface of the magnetic disk are formed on the rear surface of the disk as shown in FIG. 15. will be.

At this time, T1 _n and T1 _n-1 denote tracks formed on the surface of the magnetic disk, and T2 _n and T2 _n-1 denote the tracks of the magnetic disk. It means a track formed on the back. 13 to 15, reference numerals 450a and 450b denote magnetization surfaces of the magnetic disk.

Therefore, the above operations from step S116 to step S119 are performed at the same time, and the time compensation in step S117 is necessary for the following reasons.

First, a process of reading data through the magnetic head 310 and generating new information on the servo pattern based on the data and then recording the data through the magnetic head 310, is illustrated in FIG. 16. As it is.

16 is an exemplary diagram for explaining a data flow process in a servo pattern writing operation. Half information on a track corresponding to a first or second high capacity head provided in the magnetic head 310 at any moment is illustrated. Will be read. A series of processes up to this point is indicated by the reference number RP1.

Thereafter, the amplification means is amplified by the amplifying means in the read / write circuit unit 390, and then the process proceeds to the read / write process in the controller 340. A series of processes up to this point are indicated by the reference numeral RP2. The read / write process inside the control unit 340 converts the read data into digital data and recognizes it.

Although not shown in FIG. 15 during the above-described process, a time delay generated during the R / W channel pass and a time delay generated during the amplification and filtering process are inevitably generated.

In this case, a time delay that is generated, that is, a time delay that occurs during the data reading operation, is illustrated as shown in FIG. 17.

In addition, referring to the process of recording information on the servo pattern on the basis of the read half-track information, in the read / write process inside the control unit 340, the read data is passed to the servo pattern generation process, and the servo pattern In the generating process, the servo pattern corresponding to the track to be newly recorded is generated by accessing the information of the servo pattern stored in the attached ROM of FIG. 6. A series of processes up to this point are indicated by the reference numbers WP1 and WP2.

Subsequently, the servo pattern generated through the servo pattern generation process inside the controller 340 is transferred to the read / write circuit unit 390, and the read / write circuit unit 390 amplifies the received data and then generates the magnetic pattern. The head 310 writes to the magnetic disk.

Therefore, the time delay compensation process of step S117 is required in order to accurately match information between tracks while the operations from step S116 to step S119 are performed simultaneously.

In accordance with the necessity described above, the present invention uses a method of changing a threshold value set due to a problem such as noise during the process of obtaining a digital value of a signal read from a conventional head for time compensation. In other words, the limit value is changed to a range that can solve the error range according to the time delay that can be obtained experimentally.

The basis of the technical idea as described above is shown in FIG. 18, and the technical idea shown in FIG. 18 is as follows.

FIG. 18 is a diagram illustrating a change in a data signal according to a change in a limit value. In general, when a signal is set to a predetermined limit after detecting an arbitrary limit in the process of converting an analog signal into digital data, the signal is output as a digital signal in a high state. do. This case is a positive signal case, and a negative signal is output as a digital signal in a high state when the threshold value is below the threshold value.

Therefore, as shown in the accompanying FIG. 18, when a specific analog signal is converted into digital data, a conventional + limit reference value or a-limit reference value is used. The waveform will be generated.

In this case, a waveform obtained by synthesizing the digital waveform referred to as + data or −data in FIG. 18 is a digital waveform referred to as +/− data in FIG. 18.

Therefore, decreasing or increasing the threshold set as the + limit reference value or the -limit reference value causes deformation in a digital waveform referred to as +/- data, such as +/- data when the limit is decreased or increased. It is a digital waveform called.

In other words, when a delay time occurs as shown in FIG. 17, the delay time is measured at the time of system design, and is set by increasing or decreasing the threshold reference value according to the measured delay time. To overcome them. For example, if the time delay is large, the threshold threshold is lowered so that the data is recognized at a time earlier than the time when the conventional data was recognized. Then, the servo pattern is written based on the read / write process and the servo pattern generation process. As a result, the error due to time delay is prevented.

Through the above operation, the time compensation operation is performed in step S117. Even when the operations from step S116 to step S119 are performed simultaneously, the servo pattern recorded in the adjacent track or the previous track and the servo pattern currently recorded are recorded. It will be able to match.

Through the above operation, the servo pattern on the surface of the magnetic disk, which is read through the first high capacity head HH1 in a state where synchronization matching is made continuously to the previously recorded servo pattern, is performed through the second high capacity head HH2. While writing on the back side of step S120, the first high capacity head HH1 also writes data in the area where it is located.

At this time, the section in which the first high capacity head HH1 writes data in the step S120 is a burst area, which is simultaneously performed while the second high capacity head records the burst area of the servo pattern area in step S119. A detailed description of the part will be described later with reference to the accompanying drawings of FIGS. 19 to 29.

When the operation of step S120 is performed, in step S121 it is determined whether all servo information has been recorded for one track. That is, it is determined whether one rotation by the spindle motor has been performed. If it is determined in step S121 that all servo information is not recorded for one track, the process proceeds to step S116 to perform the above-described process again.

On the other hand, if it is determined in step S121 that all the servo information has been recorded for one track, the process proceeds to step S122 to determine whether all tracks have been completed for the entire area where the track can be formed, and when it is determined to be completed, the process is completed. If it is determined not to proceed, the flow proceeds to step S123.

In the step S123, as in the operation of the step S113, the servo head recorded through the process of the step S119 is read through the second high capacity head HH2, and the magnetic head 310 is applied to the micro step control and the hybrid control method. Therefore, it is moved within 0.5 track intervals or 0.5 head intervals.

Therefore, in step S124, it is determined whether the magnetization amount of the servo information read in step S123 is within the threshold range, and when it is determined that the threshold range is within, the process proceeds to step S125.

In step S125, a servo pattern different from the servo pattern read in step S115 of FIG. 9 is accessed from the ROM, and in step S126, a servo pattern recorded through the second high capacity head HH2 is read. Since the servo pattern is a state in which the hard track is transferred through the steps S123 and S124, the servo information actually read through the second high capacity head HH2 is about a half track or half head.

The servo pattern read in step S126 is converted into digital data through the process of step S127, and the above-described time delay compensation is performed. After the compensation according to the time delay in step S127, step S128 is performed. The data of the servo pattern accessed in step S125 and the step S126 and the read servo pattern are merged to form a servo pattern of a new track, and the process proceeds to step S129.

In step S129, the servo pattern generated in step S128 is recorded using the first high capacity head HH1. In step S130, as in step S120, the first high capacity head HH1 servos through the step S129. While recording the burst area of the pattern area, the second high capacity head HH2 also records data in the burst area.

The detailed description of the operation of the step S130 is the same as the operation of the step S120 always described in detail later.

If the above-described operation of step S130 is performed, it is determined in step S131 whether all servo information has been recorded for one track. If it is determined that all servo patterns for one track are formed, the process proceeds to step S113 to repeat the above-described process. If it is determined that a total of 96 servo pattern regions have not yet been formed for the track, the process proceeds to step S126.

At this time, the above-described process, that is, while repeatedly performing the operations from step S113 to step S131, the reason for determining whether or not to record the servo information for the entire area in step S122 will be briefly described as follows.

The reason for judging after writing of the servo pattern through the second high capacity head HH2 in step S122 is that the shape of the head applied in the present invention is shown in FIG. Is assumed to exist on the outer side of the magnetic disk compared to the first high capacity head HH1, if the position of the track currently recorded by the second high capacity head HH2 has reached the margin area of the magnetic disk. It is determined that no further track formation is necessary.

Accordingly, if the shape of the head used in the present invention is shown in FIG. 11, the second high-capacity head HH2 is present in the center of the magnetic disk as compared to the first high-capacity head HH1. Step S122 of FIG. 10 will be located after step S131.

In addition, hereinafter, the operation of the step S120 or the step S130 will be described with reference to the drawings of FIGS. 19 to 29.

19 to 29 are sequential illustrations for explaining a process of recording a burst signal overlapping two tracks of an embedded servo pattern.

FIG. 19 and FIG. 20 show a sync and an index while recording information on a corresponding track of data generated in step S118 or step S128 in step S119 or step S129 after forming the n-2nd track. If you record the same data as the data recorded on the other side of the disc that is currently being recorded, and read the data without writing any data until you record the gray code for the track, the burst area overlaps. The process of recording burst data between tracks is shown.

21 and 22 illustrate a process of forming the n-3rd track based on the n-2nd track information by regressing the process of step S122, and the sync and the index are The same data is recorded and the gray code is newly recorded. At this time, the burst area is synchronously matched to a specific clock to record corresponding to the preset servo pattern without generating overlapping phenomenon.

23 to 29 illustrate a process in which the servo pattern as shown in FIG. 5 is formed while repeatedly performing the operations of FIGS. 19 to 22.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

A servo pattern recording method and a device of a high capacity magnetic recording medium driving apparatus for self-servo writing according to the present invention operating as described above, and a device thereof, such as a servo light or the like in the manufacturing process or maintenance process of a magnetic disk recording apparatus By enabling the servo track information to be recorded by the magnetic disk recording apparatus itself without using a specific device, there is an effect of reducing the production cost, simplifying the manufacturing process, and convenience of maintenance.

Claims (27)

It consists of a first head and a second head, which interlocks with each movement to move the same distance, and provides a reference for controlling the transfer of the magnetic head respectively located on the surface and the rear surface of the magnetic disk rotated by the spindle motor A method of operating in a magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk on which servo information is recorded: A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head transportation information; A second step of deleting the remaining data from the position of the transferred head to the entire disk area; A third step of returning to the magnetic head position in the first step when the remaining data is deleted for the entire disk area through the second step; A reference track is formed by recording a predetermined servo pattern during one rotation period of the spindle motor at the position of the magnetic head transferred through the third process in synchronization with the specific signal generated by the spindle motor. The fourth process; A fifth process of transferring the head by a predetermined track interval based on the already recorded servo pattern; And And a sixth process of reading the servo pattern already recorded at the position of the head transferred by the predetermined track interval and performing the time correction while recording the servo pattern of the next track. A servo pattern recording method of a high capacity magnetic recording medium driving device for servo writing. The method of claim 1, And a seventh process of repeatedly performing the fifth and sixth processes until the track formation is possible. The method of claim 1, And an eighth step of forming a data area during recording of the servo pattern. The method of claim 1, The track transfer method of the magnetic head in the first to third processes is an open loop method according to the position control method of the step motor according to the micro step control and the hybrid control method. Servo pattern recording method of a medium drive device. The method of claim 1, The second process includes a first step of performing DC erasing at a position where the first and second heads are present; If the DC erase operation is performed in the first step, the second step of performing the first step by transferring the head at a predetermined interval until the DC erase operation for the entire area on the magnetic disk is performed; A servo pattern recording method of a high capacity magnetic recording medium driving device for self servo writing. The method of claim 5, The servo pattern recording method of the high capacity magnetic recording medium driving apparatus for self-serving, characterized in that the transfer interval of the head corresponds to one track width in the second step. The method of claim 5, The servo pattern recording method of the high capacity magnetic recording medium driving device for self-serving, characterized in that the transfer interval of the head in the second step corresponds to the head width. The method of claim 5, The servo pattern recording method of the high-capacity magnetic recording medium driving apparatus for self-servo writing, wherein the feeding interval of the head corresponds to a half track width in the second step. The method of claim 1, The sixth step includes: a first step of reading a servo pattern already recorded at a position of a first head transferred by a predetermined track interval through the fifth step; A second step of performing time delay compensation while converting the servo pattern read in the first step into digital data; And And a third step of recording the data converted into the digital data in the second step through a second head at an arbitrary position on the magnetic disk. The servo of the high-capacity magnetic recording medium driving apparatus for self-serving writing, comprising: Pattern recording method. The method of claim 9, A servo pattern recording method of a high capacity magnetic recording medium driving device for self-servo writing, characterized in that the first step to the third step in real time. The method of claim 9, The predetermined track interval of the head transferred through the fifth process maintains an interval within 0.5 track intervals. The method of claim 9, The predetermined track interval of the head to be transferred through the fifth process maintains 0.5 head intervals. The method of claim 9, In the second step, a high capacity magnetic recording medium driving device for self-servo writing, characterized in that the reference threshold set in order to convert the head signal output from the corresponding head into digital data is increased or decreased in proportion to the variation in time delay. Servo pattern recording method. The method of claim 9, The first to third steps may be repeatedly performed until the track-forming area of the magnetic disk is out of the trackable area, and the number of executions from the first to the third step is 2n (n is a natural number). The method of claim 1, wherein the first head performs the function of the second head and the second head performs the function of the first head. The method of claim 1, In the fifth process, the track feeding method of the magnetic head is a closed loop control method using position control of the step motor and servo pattern recognition according to the micro step control and the hybrid control method. Servo pattern recording method of a medium drive device. The method of claim 15, The hybrid control method applies a sinusoidal sine wave to A phase and a cosine sine wave to B phase to rotate the rotor inside the stem motor having A phase and B phase by a predetermined angle based on a preset micro step adjustment signal. A first step of performing microstep driving; A second step of performing a position locking control inherent in the step motor when the head is stopped during the transfer operation of the magnetic head through the first step; And And a third step of simultaneously performing the control of the first step and the control of the second step during one sampling period when the head is moved at a fine interval from the stop position of the head. Servo pattern recording method of driving device. The method of claim 1, The sixth step includes: a first step of reading a servo pattern already recorded at a position of a first head transferred by a predetermined track interval through the fifth step; A second step of performing time delay compensation while converting the servo pattern read in the first step into digital data; A third step of generating a new servo pattern according to preset servo information; A fourth step of merging the data converted into digital data in the second step and the servo pattern generated in the third step; A fifth step of recording the data merged through the fourth step through a second head at an arbitrary position on a magnetic disk; And And a sixth step of recording a servo pattern in a partial region of the servo pattern at a corresponding position through the first head while recording the data merged through the fourth step at the second head through the fifth step. A servo pattern recording method of a high capacity magnetic recording medium driving device for self servo writing. The method of claim 17, A servo pattern recording method of a high capacity magnetic recording medium driving device for self-servo lighting, characterized in that the first step to the sixth step in real time. The method of claim 17, The first to sixth steps are repeatedly performed until the track-forming area of the magnetic disk is out of the area capable of forming tracks, and the number of executions from the first to sixth steps is 2n (n is a natural number). The method of claim 1, wherein the first head performs the function of the second head and the second head performs the function of the first head. It consists of the first head and the second head and move the same interval in conjunction with each movement, and are located opposite to the front and back of the magnetic disk, respectively, The first head and the second head each have a high capacity head for a high capacity magnetic disk and a standard type head. The magnetic head of the high-capacity magnetic recording medium driving device for self-servo writing, characterized in that the high-capacity heads have a predetermined separation distance in a space between standard standard heads maintaining a predetermined distance. The method of claim 20, The magnetic head of the high-capacity magnetic recording medium driving device for self-servo writing, characterized in that the separation distance between the high-capacity heads has a relatively small distance compared to the separation distance between the standard heads. A first head having a first high capacity head for a high capacity magnetic disk and a standard first standard head, and a second head having a second high capacity head for a high capacity magnetic disk and a standard second type head. Of the magnetic disk, in which servo information is recorded, which provides a reference for controlling the movement of the magnetic head located on the surface and the rear surface of the magnetic disk rotated by the spindle motor by moving the same interval in association with each movement thereof. A method of operating in a magnetic disk drive system that performs data reading / writing operations through the magnetic head in a data area, the method comprising: A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head transportation information; A second process of performing a DC erasing at a position where the standard first and second standard heads of the magnetic head exist through the first process; And If the DC erase operation is performed in the second process, the method includes a third process of repeatedly performing the second process by transferring the head at predetermined intervals until the DC erase operation is performed on the entire area of the magnetic disk. A method for removing data in a high capacity magnetic recording medium driving device for self-servo writing. The method of claim 22, The data transfer method of the high-capacity magnetic recording medium driving device for self-servo writing, characterized in that the feeding interval of the head in the third process corresponds to the head width of the standard standard head. The method of claim 22, The transfer distance of the head in the third process corresponds to a track width of a standard type corresponding to a standard type standard head. The method of claim 22, The transfer distance of the head in the third process corresponds to a standard half-width of the standard type corresponding to the standard type standard head, the method of removing data in a high capacity magnetic recording medium driving device for self-servo writing. It consists of a first head and a second head, which interlocks with each movement to move the same distance, and provides a reference for controlling the transfer of the magnetic head respectively located on the surface and the rear surface of the magnetic disk rotated by the spindle motor A magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk on which servo information is recorded: The magnetic head is provided as a head feed means according to a closed loop control method through position control of a step motor and servo pattern recognition according to a micro step control and a hybrid control method; The magnetic head is provided with a standard standard head in addition to the high capacity head; A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information; and using the standard type standard head to store remaining data for the entire disk area from the position of the conveyed head. In the second step of deleting, and when the remaining data is deleted for the entire disk area through the second step, after returning to the initial position, the spindle motor is synchronized with the index pulse and the FG signal generated by the spindle motor. A third step of forming a reference track by recording a preset servo pattern during one rotation period; and a fourth step of transferring the first high capacity head by a predetermined track interval based on the recorded servo pattern; Already recorded at the position of the first high-capacity head fed by the predetermined track interval in step 4. A fifth step of reading the beam pattern, a sixth step of performing time delay compensation while converting the servo pattern read in the fifth step into digital data, and data converted into digital data in the sixth step Performing a seventh step of recording via the second high capacity head at an arbitrary position on the magnetic disk; The fifth to seventh stages are processed in real time, and the transfer interval of the magnetic heads is maintained within 0.5 high-capacity track intervals during the process from the fourth to seventh stages. Control the head conveying means; The fourth to seventh steps may be repeatedly performed until the track forming area of the magnetic disk leaves the region where the track can be formed, and the number of repetitions of the fourth to seventh steps 2n-1 (n is The second high capacity head performs the function of the second high capacity head and the second high capacity head performs the function of the first high capacity head to record the servo pattern on the magnetic recording medium by itself. A high capacity magnetic recording medium drive device for a vehicle. It consists of a first head and a second head, which interlocks with each movement to move the same distance, and provides a reference for controlling the transfer of the magnetic head respectively located on the surface and the rear surface of the magnetic disk rotated by the spindle motor A magnetic disk drive system for performing data reading / writing operations through the magnetic head in a data area of a magnetic disk in which embedded servo information is recorded: The magnetic head is provided as a head feed means according to a closed loop control method through position control of a step motor and servo pattern recognition according to a micro step control and a hybrid control method; The magnetic head is provided with a standard standard head in addition to the high capacity head; A first step of transferring the magnetic head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information; and using the standard type standard head to store remaining data for the entire disk area from the position of the conveyed head. In the second step of deleting, and when the remaining data is deleted for the entire disk area through the second step, after returning to the initial position, the spindle motor is synchronized with the index pulse and the FG signal generated by the spindle motor. A third step of forming a reference track by recording a preset servo pattern during one rotation period; and a fourth step of transferring the first high capacity head by a predetermined track interval based on the recorded servo pattern; Already recorded at the position of the first high-capacity head fed by a predetermined track interval in step 4 A fifth step of reading a servo pattern, a sixth step of performing time delay compensation while converting the servo pattern read in the fifth step into digital data, and a new servo pattern according to preset servo information The seventh step of generating the data, the eighth step of merging the data converted into the digital data in the sixth step and the servo pattern generated in the seventh step, and the data merged through the eighth step on the magnetic disk The ninth step of recording through the second high-capacity head at an arbitrary position, and the data merged through the eighth step in the second high-capacity head through the ninth step, and recording through the second high-capacity head. If the information of the servo pattern is the embedded burst mode, the burst of the servo pattern at the corresponding position through the first high capacity head. Perform a tenth step of recording an area; The fifth to tenth stages are processed in real time, and the transfer intervals of the magnetic heads are maintained within 0.5 high-capacity track intervals while performing the processes from the fourth to tenth stages. Control the head conveying means; Repeat steps 4 through 10 until the entire track is out of the trackable area, and the number of times of repeating the steps 4 through 10 is 2n-1 (n is The second high capacity head performs the function of the second high capacity head and the second high capacity head performs the function of the first high capacity head to record the servo pattern on the magnetic recording medium by itself. A high capacity magnetic recording medium drive device for a vehicle.