KR20000034855A - self servo writing method for recording magnetic media driving apparatus and device for the same - Google Patents

Abstract

PURPOSE: A record medium driving apparatus is provided to record a servo signal for a position control on a magnetic record medium in a drive system itself of the magnetic record medium which uses an embedded servo way. CONSTITUTION: A record medium driving apparatus comprises a magnetic head(310), a spindle motor(320), a micro step motor(330), a micro controller(340), first and second digital-to-analog converters(350,360), first and second step motor drivers(370,380), a read/write circuit(390), a spindle motor driver(400), an interface part(410) and a memory(420). The micro controller(340) deciphers a position information signal read out from a magnetic disk(450) through the magnetic head(310) to calculate a shifting position between tracks of the head(310). The controller(340) generates a digital phase control signal for driving the micro step motor(330), a control signal for driving the spindle motor(320), and a control signal for reading or writing data, in response to the calculated value. The first micro step motor driver(370) controls a first phase current flow for a driving of the micro step motor(330) of a second phase according to an output signal of the converter(350). The second micro step motor driver(380) controls a second phase current flow for a driving of the micro step motor(330) of a second phase according to an output signal of the converter(360). The read/write circuit(390) is controlled by a control signal from the controller(340), and controls the reading and the writing of the head(310). The spindle motor driver(400) drives the spindle motor(320) according to the control of the controller(340).

Description

Self servo writing method for magnetic recording medium driving apparatus and device therefor {self servo writing method for recording magnetic media driving apparatus and device for the same}

The present invention relates to a drive system of a magnetic recording medium employing a servo method for providing head position information to control the movement of a head. In particular, an external device assists in recording an embedded servo pattern. The present invention relates to a self-servo recording method of a recording medium driving apparatus and a device for allowing a recording medium driving apparatus to record a servo signal for position control on a magnetic recording medium by itself.

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 . The servo information stored in the servo areas S _{1 to} S _k is a magnetic head along a track indicated by reference numbers T1 to Tn for writing data to or reading data from a disc. Refers to the positional recognition reference data of the magnetic head necessary 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 region is an embedded servo method, and a typical servo pattern is as shown in FIG. 2.

The servo pattern according to the embedded servo method illustrated in FIG. 2 is a simplified diagram, and includes a servo sync pattern, a servo address mark (SAM) pattern, an index pattern, a gray code pattern, and bursts A and B. , 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 and provides a timing reference for the corresponding servo sector. 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 a 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 servo writing process records servo information for controlling the position of the head, as described above, the performance of not only track searching but also track tracking performance is affected. This is a servo writing process in 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.

However, since the price of the servo pattern writer is very high, the goal of reducing the production cost of the magnetic disk drive device is limited. If the servo pattern on the magnetic disk is damaged, a separate device such as a servo pattern light is required for maintenance. Problems such as that should 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 for this is that in the drive of the high capacity floppy disk, a voice coil motor is used as a motor for the transfer of the magnetic head in consideration of the narrow track width, and due to the characteristics of the voice coil motor, a closed loop based on a servo pattern is used. This is because it is impossible to transfer the magnetic head when the servo pattern is damaged or lost due to the control method.

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 an increase in the drive price caused by the optical control system for the recognition of the optical servo pattern occurs. Problems have arisen.

An object of the present invention for solving the above-described problems of the prior art is embedded without the help of an external device, as the need for the development of technology capable of forming a servo pattern on a magnetic disk without using equipment such as a servo pattern light is on the rise. Disclosed is a self-serving recording method and apparatus for a magnetic recording medium driving apparatus capable of recording a servo signal for position control on a magnetic recording medium by a system for driving a magnetic recording medium using a servo method.

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 exemplary diagram of a servo pattern in an embedded scheme;

5 is a simplified configuration example of a general high capacity floppy disk drive device;

Figure 6 is a simplified configuration example of a standard floppy disk drive device,

Figure 7 is a simplified configuration example of a high capacity floppy disk drive device having a self-servo writing function according to the present invention,

8 is an operation flowchart of a self servo recording process according to the present invention;

9 is an exemplary diagram for describing a technical spirit of the embodiment illustrated in FIG. 8.

<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

A feature of the present invention for achieving the above object is a drive of a recording medium for performing data reading / writing operations through a head in a data area on a magnetic recording medium on which servo information is provided which provides a reference for controlling the transfer of the head. A method of operating in a system, the method comprising: a first process of transferring the head to an arbitrary position on the magnetic recording medium on the basis of preset head conveying information, and a specific signal generated from driving means for driving the magnetic recording medium; A second process of recording a preset servo pattern during one rotation period of the recording medium driving means provided for driving the recording medium at the position of the head transferred through the first process in synchronization with the reference; After transferring a predetermined distance to recognize the servo pattern recorded through the second process as a reference signal Having a third process of writing the servo pattern of the following locations:

An additional feature of the present invention for achieving the above object further comprises a fourth process of repeatedly performing the third process until the servo pattern is formed over the entire area of the magnetic recording medium.

Further additional features of the present invention for achieving the above object include a fifth process of forming a data area based on the recorded servo pattern.

An additional feature of the present invention for achieving the above object is to further include a sixth process of forming a data area based on the recorded servo pattern while repeatedly performing the third process.

As another additional feature of the present invention for achieving the above object, the head feeding method includes an open loop control method for transferring the head to a predetermined position on a magnetic recording medium through position control of a step motor according to micro step control. To use.

As another additional feature of the present invention for achieving the above object, the transfer method of the head uses a closed loop control method for controlling the driving range of the voice coil motor by recognizing the presence position of the head through a magnetic or optical position sensor. There is.

As another additional feature of the present invention for achieving the above object, the third process includes a first step of recording a servo pattern recorded through the second process at an arbitrary position on a magnetic recording medium, and the second process. A second step of transferring the head to a place where the servo pattern should be located after the servo pattern has been recorded through the second step; and any position on the magnetic recording medium through the first step at the position of the head transferred through the second step. And a third step of recording the servo pattern on the basis of the servo pattern recorded in the.

Another feature of the present invention for achieving the above object is a recording medium for performing data reading / writing operations through a head in a data area on a magnetic recording medium on which servo information is provided which provides a reference for controlling the movement of the head. A drive system comprising: a voice coil motor according to a method of controlling a driving range range by recognizing a presence position of a head through a magnetic or optical position sensor, or a step motor according to a micro step control method to an arbitrary area on a magnetic recording medium. A head conveying means for conveying the head; A first step of transferring the head to an arbitrary position on the magnetic recording medium on the basis of preset head transport information; and synchronizing the first head based on a specific signal generated from driving means for driving the magnetic recording medium; A second step of recording a preset servo pattern during one rotation period of the recording medium driving means provided for driving the recording medium at the position of the head transferred through the step; A third step of recording a servo pattern at a next position based on the servo pattern recorded through the second step; and a head transfer to a place where the servo pattern should be located after the servo pattern recorded through the second step The fourth stage and any position on the magnetic recording medium through the third stage at the position of the head transferred through the fourth stage. A fifth step of recording the servo pattern on the basis of the servo pattern recorded in the device and a sixth step of repeatedly performing the steps 4 to 5 until the servo pattern is formed for the entire area of the magnetic recording medium. Performing the steps to write the servo pattern itself to the magnetic recording medium.

Another feature of the present invention for achieving the above object is that of a magnetic disk on which servo information is recorded, which is rotated by a spindle motor and provides a reference for controlling the transfer of a magnetic head consisting of a first head and a second head. A method of operating a magnetic disk drive system for performing a data reading / writing operation through a magnetic head in a data area, the method comprising: moving the magnetic head to an arbitrary position where a track can be formed based on preset head conveying information; And a preset servo pattern is recorded during one rotation period of the spindle motor at the position of the magnetic head transferred through the first process in synchronization with the first pulse and the index pulse generated by the spindle motor and the FG signal. A second process, and the magnetic head is transferred after a predetermined track interval; And a third process of recognizing the servo pattern recorded at the previous position and recording the servo pattern at the next position.

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

Further additional features of the present invention for achieving the above object include a fifth process of forming a data area based on the recorded servo pattern.

An additional feature of the present invention for achieving the above object is to further include a sixth process of forming a data area based on the recorded servo pattern while repeatedly performing the third process.

As another additional feature of the present invention for achieving the above object, the transfer method of the magnetic head includes an open loop control method for transferring the head to a predetermined position on the magnetic disk through the position control of the step motor according to the micro step control. To use.

As another additional feature of the present invention for achieving the above object, the transfer method of the magnetic head is a closed loop control method for controlling the driving range of the voice coil motor by recognizing the presence position of the head through a magnetic or optical position sensor. To use.

As another additional feature of the present invention for achieving the above object, the third process includes a first step of reading the recorded servo pattern and transferring the first head by a predetermined track interval based on the servo pattern; And a second step of reading the servo pattern already recorded through the first head transferred through the first step, and writing the second through the second head existing at an arbitrary position on the magnetic disk.

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

As another additional feature of the present invention for achieving the above object, the track transfer method of the head controls the driving range of the voice coil motor through the presence position recognition and the servo pattern recognition of the head through a magnetic or optical position sensor. The loop control method is used.

In another aspect of the present invention for achieving the above object, the predetermined track spacing is to maintain an interval within 0.5 track spacing or a 0.5 head spacing.

An additional feature of the present invention for achieving the above object is that the first head and the second head to move the same interval in conjunction with each movement, and to be located on the front and rear surfaces of the magnetic disk, respectively .

An additional feature of the present invention for achieving the above object is to perform repeatedly from the first step to the second step until the track-forming area with respect to the entire area of the magnetic disk is removed, wherein the first The number of executions from the step to the second step is to perform the function of the first head in the second head and the function of the second head in the second head (n is a natural number).

As another additional feature of the present invention for achieving the above object, the third process includes a first step of reading the recorded servo pattern and transferring the first head by a predetermined track interval based on the servo pattern; A second step of reading data at a position of a first head transported by a predetermined track interval through the first step, and at the same time as reading the data through the second step, the read data is placed on a magnetic disk; And a third step of writing through the second head at an arbitrary position.

As another additional feature of the present invention for achieving the above object, the track transfer method of the head uses a closed loop control method through position control of a step motor and servo pattern recognition according to micro step control.

As another additional feature of the present invention for achieving the above object, the track transfer method of the head controls the driving range of the voice coil motor through the presence position recognition and the servo pattern recognition of the head through a magnetic or optical position sensor. The loop control method is used.

In another aspect of the present invention for achieving the above object, the predetermined track spacing is to maintain an interval within 0.5 track spacing or a 0.5 head spacing.

An additional feature of the present invention for achieving the above object is to perform repeatedly from the first step to the third step until the track formation is possible for the entire area of the magnetic disk, the first step In step 2n (n is a natural number) from the step to the third step, the function of the first head is performed by the second head, and the function of the second head is performed by the first head.

In another aspect of the present invention for achieving the above object is a magnetic disk is rotated by a spindle motor, consisting of a first head and a second head which is located on the front and rear surfaces of the magnetic disk with a predetermined separation distance, respectively 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 a magnetic head, comprising: a magnetic or optical position sensor A voice coil motor or a step motor according to a micro step control method according to a method of controlling a driving range range by recognizing the presence of a head through the head transport means for transferring the magnetic head to an arbitrary area on a magnetic recording medium is provided. and; Transferring the magnetic head to an arbitrary position where a track can be formed on the basis of preset head transport information; and transferring the magnetic head through the first step in synchronization with the index pulse and the FG signal generated by the spindle motor. A second step of recording a preset servo pattern during the one rotation period of the spindle motor at the position of the magnetic head, and reading the recorded servo pattern and setting the first head by a predetermined track interval based on the servo pattern. A third step of transferring, and a fourth step of reading a servo pattern already recorded through the first head transferred through the third step and recording the second through a second head existing at an arbitrary position on the magnetic disk; And from the third step to the fourth step until the magnetic head is out of the trackable area of the magnetic disk. Performing a fifth step of repeatedly performing the process; During the process from the third to the fourth step, the feed interval of the magnetic head is controlled to record the servo pattern on the magnetic recording medium by controlling the head feed means to maintain the interval within 0.5 track interval from 0.5 head interval. There is.

An additional feature of the present invention for achieving the above object is to perform the function of the first head in the second number of times 2n-1 (n is a natural number) in the fifth step, while performing the fifth step. And the function of the second head is to perform at the first head.

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, before describing the present invention, a high-capacity floppy disk will be described with reference to FIG. 3 attached to the servo writer configuration and operation of the high-capacity floppy disk.

3 is a diagram illustrating a configuration of a servo writer of a general high capacity floppy disk, a voice coil motor 46 for transferring a magnetic head 45 provided at an end of an actuator according to an input control signal, and the voice. To record data on the surface of the floppy magnetic disk 38 through the optical encoder 44 and the magnetic head 45 to detect the transfer distance of the magnetic head 45 in accordance with the driving of the coil motor 46. R / W channel 42 for providing a servo pattern flowing into the magnetic head 45 side, the spindle motor 35 for rotating the floppy magnetic disk 38 by the input drive signal, and the input control The floppy magnetic disk is provided on a motor driving part 34 that provides a drive signal to the spindle motor 35 and a rotation shaft that provides a rotational force of the spindle motor 35 to the floppy magnetic disk 38 according to a signal. The hard magnetic disk 37 rotating at the same speed as the clock 38, a reference clock generator 33 for generating a reference signal for recording a servo pattern, and the reference clock generator 33 in accordance with a control signal. A reference head 36 for recording a reference signal generated in the hard magnetic disk 37 or reading a reference signal recorded in the hard magnetic disk 37 and the floppy magnetic disk 38 to be recorded. A servo pattern generator 31 for storing the servo pattern and outputting the stored data according to an input control signal, and a main controller 30 for controlling the components to write the servo pattern on the floppy magnetic disk 38. Consists of.

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 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, The synchronization of the servo pattern information provided to the magnetic head 45 side through the R / W channel 42 is performed.

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 repeatedly performed until the servo pattern is recorded for the entire track (however, the process of writing the reference signal 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.

The reason described with reference to FIGS. 3 and 4 attached to a servo writing method of a conventional high capacity floppy disk operating as described above is for understanding the technical background to be used in the present invention.

That is, the most important configuration or parameter of the servo light device for forming the servo information on the magnetic disk through the operation as described above is the very precise movement means 44, 46, 40 of the magnetic head 45 and the reference signal. The generating means 33, 36, 37 and the servo pattern generating means 31, 42 may be referred to.

Therefore, the technique to be applied in the present invention allows the components inside the magnetic disk drive device to perform the important technical means for performing the operation of the above-described servo light device, thereby generating the servo pattern, that is, the position information without the servo light. You want to be able to record on the disc.

The technical idea of the present invention described above is based on the related technology of the magnetic disk drive device, that is, the memory drive technology, which is based on the magnetic or optical position sensor technology, the step motor control technology, and the frequency generation of the spindle motor. ) And index pulse function.

First, referring to FIG. 5 attached to the high capacity floppy disk drive corresponding to the servo light shown in FIG. 3 among the existing magnetic disk drive devices, the configuration of the high capacity floppy disk drive shown in FIG. It will be appreciated that is the same as the configuration of most of the servo lights shown in FIG. 3. However, the configuration difference from the servo light is that there is no optical encoder for detecting the transfer position of the head, hard magnetic disk peripheral configuration for recording the reference clock, and configuration for generating the servo pattern.

Therefore, in the present invention, if a magnetic or optical position sensor capable of performing the same function as the optical encoder of the servo light is added to the configuration of FIG. It was focused on the fact that it can be controlled.

In addition, in order to realize the purpose of self-servo lighting according to the present invention, a reference clock must be recorded for synchronous matching, so that an index pulse generated by most spindle motors (generated by the spindle motor drive itself or an index sensor) is used. It has been pointed out that if a certain reference signal is recorded in a specific area of the magnetic disk by using the &lt; RTI ID = 0.0 &gt;

In addition, it was conceived that the configuration for generating the servo pattern included in the servo writer can be easily solved by storing a specific servo pattern in a ROM or other nonvolatile memory device.

Therefore, the present invention applies the magnetic or optical position sensor technology and the FG and index pulse functions of the spindle motor.

In addition, referring to Figure 6 attached to the configuration of the standard floppy disk drive device, the configuration of the high capacity floppy disk drive device shown in FIG. The driving motor is a step motor, and the reason why the voice coil motor is used as the head feeding motor of the high-capacity floppy disk drive device is that the head feeding interval is very dense.

That is, because the step motor control technique used in the existing standard type floppy disk drive device is impossible to transport very tight track intervals, in the present invention, if the micro step control method known in the art is applied, It was conceived that voice coil motors, which have the burden of additional magnetic or optical position sensors in use, may not be used.

In addition, unlike the voice coil motor used in most high-capacity floppy drivers, if the micro position movement is possible by using a step motor, it has the function of an open loop positioner that can stop at an arbitrary position. Therefore, the inventors have focused on the fact that the head can be moved to a predetermined position on the magnetic disk even if there is no servo information on the magnetic disk.

Therefore, the self-serving function may be performed by applying the above-described motor control technique or optical / magnetic position sensing technique and the FG and index pulse functions of the spindle motor.

With reference to FIG. 7 attached to the configuration of the recording medium driving apparatus having a self-servo writing function according to the present invention based on such a technique as follows.

7 is a diagram illustrating a configuration of a recording medium driving apparatus having a self-servo writing function, in which a step motor control procedure is applied, and a magnetic head 310, a spindle motor 320, and a microcomputer. A step motor 330, a controller 340, a first digital-analog converter 350, a second digital-analog converter 360, and a first step motor driver 370. ), A 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.

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.

A preferred operation example of a recording medium driving apparatus having a self-serving writing function according to the present invention configured as described above will be described with reference to FIG. 8.

8 is an operation flowchart of a self-servo recording process according to the present invention. Referring to the configuration of FIG.

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 transferred to a position according to the data based on the head transfer data stored in the ROM. Let's do it.

At this time, in the case of the micro step motor 330 as shown in FIG. 7, the reference position according to the structure of the magnetic disk is stored in advance, and thus the micro step motor 330 is moved to the stored position.

On the other hand, if the micro step motor 330 is not used as shown in FIG. 7, that is, when the voice coil motor is used as shown in FIG. 5, the initial position is sensed using the magnetic / optical position sensor. Then, the magnetic head 310 is moved to the detected initial position.

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.

When the operation of deleting the remaining data through the process of step S104 described above is performed, the magnetic head 310 is returned to the initial position where the head was located in the process of step S103.

When the magnetic head 310 returns to the initial position through the process of step S105, in step S106, the servo pattern stored in the ROM is accessed, and the flow proceeds to step S107 to generate an index pulse in the spindle motor 320. Judge whether or not.

If it is determined in step S107 that an index pulse has occurred, the flow advances to step S108 to record the servo pattern accessed in step S106 in synchronization with the FG signal generated by the spindle motor 320.

In this case, in general, the magnetic disk 450 may store data on both the front and back surfaces thereof, and the magnetic head 310 may include a first head and the data to write or read data on the surface of the magnetic disk 450. It is composed of a second head to write or read data on the back of the magnetic disk 450, the first head and the second head is maintained at a distance of a predetermined number of track intervals.

Thereafter, in step S109, the magnetic head 310 is moved within 0.5 track intervals or 0.5 head intervals while reading the servo pattern recorded through the process of step S108, and in step S110, the head has previously recorded data. That is, in step S109, the data read through the head existing on the other side is simultaneously recorded while reading the data through the head on which the half track is taken during the half track movement.

The reason for transferring the magnetic head 310 while reading the servo pattern in step S109 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, it must be mixed with micro-step control technology.

After performing the process of step S109 and step S110 described above, it is determined by step S111 whether all tracks have been completed in the area where all the tracks can be formed, and when it is determined that it is completed, the process ends. The process of step S109 and step S110 is repeatedly performed.

Accordingly, when the head reading the servo pattern for the head transfer in step S109 is the first head, in step S110 the servo pattern read from the first head is recorded through the second head. On the other hand, when the servo pattern is read for the transfer of the head through the second head in step S109, the servo pattern read from the second head is recorded through the first head in step S110. This operation alternates the roles of the first head and the second head as described above whenever it is fed back to the step S109 by the step S111.

Accordingly, in the present invention, in order to prevent the position information of the magnetic head from being lost based on the already formed servo pattern, a half pattern is alternately read and written between the first head and the second head. Since the head is moved at the track interval or the half head interval, any head can always recognize the servo pattern information.

In addition, since the spindle motor 320 continuously rotates while performing the processes of steps S108 to S110, the data area is formed based on the servo pattern of the previously recorded servo area when the head moves between the servo area and the servo area. do.

In the embodiment of the present invention according to FIG. 8 described above, as the servo pattern is read through the head applied to the half-track and recorded by another head, the continuity of the previously recorded servo pattern is guaranteed.

At this time, the basis of the technical idea used when reading the servo pattern through the head on the half-track in the present invention, as shown in the accompanying Figure 9, the head is shown with reference numeral HT for a specific track If the half track information is being read, there is no information in the area referred to by reference number HNT. Therefore, the information read from the head is the same as the information recorded in the track n + 1, except that the signal size is the same. It is.

Therefore, in the case where information is recorded for all tracks, the data cannot be recognized if the head reads data in a state where the heads are superimposed on two adjacent tracks, but as in the present invention, all DC erase operations are performed on the remaining data. In the case of performing the self-servo writing operation after the execution, even if the half track information is read as shown in FIG. 9, the data is not damaged.

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.

By providing a self-servo recording method of the magnetic recording medium driving apparatus and the apparatus according to the present invention that operates as described above, do not use a separate specific device such as a servo writer in the manufacturing process or maintenance process of the magnetic disk recording apparatus. By enabling the servo track information to be recorded by the magnetic disk recording apparatus itself, there is an effect of reducing the production cost, simplifying the manufacturing process, and convenience of maintenance.

Claims (32)

A method of operating in a recording medium drive system for performing data reading / writing operations through a head in a data area on a magnetic recording medium on which servo information is provided which provides a reference for controlling the movement of a head: A first step of transferring the head to an arbitrary position on the magnetic recording medium on the basis of preset head transportation information; One rotation section of the recording medium driving means provided for driving the recording medium at the position of the head transferred through the first process in synchronization with a specific signal generated from the driving means for driving the magnetic recording medium. A second step of recording a preset servo pattern during the second step; And And a third process of recording the servo pattern at a next position by recognizing the servo pattern recorded through the second process as a reference signal after moving the head an arbitrary distance. Self servo recording method. The method of claim 1, And a fourth process of repeatedly performing the third process until the servo pattern is formed over the entire area of the magnetic recording medium. The method of claim 1, And a fifth step of forming a data area based on the recorded servo pattern. The method of claim 2, And a sixth process of forming a data area on the basis of the recorded servo pattern while repeatedly performing the third process. The method of claim 1, And the head feeding method is an open loop control method for transferring the head to a predetermined position on the magnetic recording medium by controlling the position of the step motor according to the micro step control. The method of claim 1, The method of conveying the head is a self-serving recording method of a magnetic recording medium driving apparatus, characterized in that a closed loop control method of controlling a driving range of a voice coil motor by recognizing a presence position of a head through a magnetic or optical position sensor. The method of claim 1, The third process includes a first step of recording a servo pattern recorded through the second process at an arbitrary position on a magnetic recording medium; A second step of transferring the head to a place where the servo pattern should be located after the servo pattern recorded through the second process; And And a third step of recording the servo pattern on the basis of the servo pattern recorded at an arbitrary position on the magnetic recording medium through the first step at the position of the head transferred through the second step. Self-servo recording method of the medium drive device. A recording medium drive system for performing data reading / writing operations through a head in a data area on a magnetic recording medium on which servo information is provided which provides a reference for controlling the movement of a head: A voice coil motor or a step motor according to a micro step control method according to a method of controlling a driving range range by recognizing a presence position of the head through a magnetic or optical position sensor for transferring the head to an arbitrary area on a magnetic recording medium. A head feed means; A first step of transferring the head to an arbitrary position on the magnetic recording medium on the basis of preset head transport information; and synchronizing the first head based on a specific signal generated from driving means for driving the magnetic recording medium; A second step of recording a preset servo pattern during one rotation period of the recording medium driving means provided for driving the recording medium at the position of the head transferred through the step; A third step of recording a servo pattern at a next position based on the servo pattern recorded through the second step; and a head transfer to a place where the servo pattern should be located after the servo pattern recorded through the second step The fourth stage and any position on the magnetic recording medium through the third stage at the position of the head transferred through the fourth stage. A fifth step of recording the servo pattern on the basis of the servo pattern recorded in the device and a sixth step of repeatedly performing the steps 4 to 5 until the servo pattern is formed for the entire area of the magnetic recording medium. A self-servo recording device of a magnetic recording medium driving apparatus, characterized in that for recording a servo pattern on a magnetic recording medium by itself. A data reading / writing operation through the magnetic head is performed in the data area of the magnetic disk which is rotated by the spindle motor and provides servo information for controlling the transfer of the magnetic head consisting of the first head and the second head. In the magnetic disk drive system to perform the operation in: A first step of transferring the magnetic head to an arbitrary position where a track can be formed on the basis of preset head transportation information; A second step of recording a preset servo pattern during one rotation section of the spindle motor at the position of the magnetic head transferred through the first process in synchronization with the index pulse generated by the spindle motor and the FG signal; And And a third step of recognizing a servo pattern recorded at a position before transfer of the magnetic head after recording the magnetic head by a predetermined track interval, and recording a servo pattern at a next position. Self-servo recording method of the device. The method of claim 9, And a fourth process of repeatedly performing the third process until it leaves an area where a track can be formed. The method of claim 9, And a fifth step of forming a data area on the basis of the recorded servo pattern. The method of claim 10, And a sixth process of forming a data area on the basis of the recorded servo pattern while repeatedly performing the third process. The method of claim 9, The self-heading recording method of the magnetic recording medium driving apparatus is characterized in that the magnetic head feeding method is an open loop control method for transferring the head to a predetermined position on the magnetic disk by controlling the position of the step motor according to the micro-step control. The method of claim 9, The method of conveying the magnetic head is a closed loop control method of controlling a driving range of a voice coil motor by recognizing a presence position of the head through a magnetic or optical position sensor. The method of claim 9, The third process includes a first step of reading the recorded servo pattern and transferring the first head by a predetermined track interval based on the servo pattern; And a second step of reading the servo pattern already recorded through the first head transferred through the first step, and writing the second through the second head existing at an arbitrary position on the magnetic disk. Self-servo recording method of recording medium drive device. The method of claim 15, The track feeding method of the magnetic head is a self-serving recording method of a magnetic recording medium driving apparatus, characterized in that a closed loop control method using position control of a step motor and servo pattern recognition according to micro step control. The method of claim 15, The track transfer method of the head is a self-recording control apparatus of a magnetic recording medium, characterized in that a closed loop control method of controlling a driving range of a voice coil motor by recognizing a head position and a servo pattern through a magnetic or optical position sensor. Servo recording method. The method of claim 15, And said predetermined track interval maintains an interval within 0.5 track intervals. The method of claim 15, And the predetermined track interval maintains 0.5 head intervals. The method of claim 15, And the first head and the second head interlock with each other so as to move at the same interval. The method of claim 15, And the first head and the second head are located on the front and rear surfaces of the magnetic disk, respectively. The method of claim 15, The first step to the second step is repeatedly performed until the track-forming area of the magnetic disk is out of the area where the track can be formed, and the number of executions from the first step to the second step is 2n (n is a natural number) And performing the function of the first head in the second head and the function of the second head in the first head. The method of claim 9, The third process includes a first step of reading the recorded servo pattern and transferring the first head by a predetermined track interval based on the servo pattern; A second step of reading data at the position of the first head conveyed by a predetermined track interval through the first step; And And a third step of recording the read data through a second head at an arbitrary position on the magnetic disk simultaneously with the process of reading the data through the second step. Servo recording method. The method of claim 23, The track feeding method of the head is a self-serving recording method of a magnetic recording medium driving apparatus, characterized in that the closed loop control method using position control of the step motor and servo pattern recognition according to the micro step control. The method of claim 23, The track transfer method of the head is a self-recording control apparatus of a magnetic recording medium, characterized in that a closed loop control method of controlling a driving range of a voice coil motor by recognizing a head position and a servo pattern through a magnetic or optical position sensor. Servo recording method. The method of claim 23, And said predetermined track interval maintains an interval within 0.5 track intervals. The method of claim 23, And the predetermined track interval maintains 0.5 head intervals. The method of claim 23, And the first head and the second head interlock with each other so as to move at the same interval. The method of claim 23, And the first head and the second head are located on the front and rear surfaces of the magnetic disk, respectively. The method of claim 23, 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). And performing the function of the first head in the second head and the function of the second head in the first head. A servo that rotates by a spindle motor and provides a reference for controlling the transfer of a magnetic head consisting of a first head and a second head positioned at the front and rear surfaces of the magnetic disk with a predetermined separation distance, respectively. A magnetic disk drive system for performing a data reading / writing operation through the magnetic head in a data area of a magnetic disk on which information is recorded: Transfer the magnetic head to an arbitrary area on a magnetic recording medium by a voice coil motor or a step motor according to a micro step control method according to a method of controlling a driving range range by recognizing a position of the head through a magnetic or optical position sensor. It is provided with a head conveying means for; Transferring the magnetic head to an arbitrary position where a track can be formed on the basis of preset head transport information; and transferring the magnetic head through the first step in synchronization with the index pulse and the FG signal generated by the spindle motor. A second step of recording a preset servo pattern during the one rotation period of the spindle motor at the position of the magnetic head, and reading the recorded servo pattern and setting the first head by a predetermined track interval based on the servo pattern. A third step of transferring, and a fourth step of reading a servo pattern already recorded through the first head transferred through the third step and recording the second through a second head existing at an arbitrary position on the magnetic disk; And from the third step to the fourth step until the magnetic head is out of the trackable area of the magnetic disk. Performing a fifth step of repeatedly performing the process; During the process from the third to the fourth step, the feed interval of the magnetic head is controlled to record the servo pattern on the magnetic recording medium by controlling the head feed means to maintain the interval within 0.5 track interval from 0.5 head interval. A self-serving recording apparatus of a magnetic recording medium driving device, characterized in that. The method of claim 31, wherein While performing the fifth step, the second head performs the function of the first head and the second head performs the function of the second head in 2n-1 (n is a natural number) of the fifth step. A self-serving recording apparatus of a magnetic recording medium driving device, characterized in that.