JPS63144468A - Information recording method - Google Patents

Abstract

PURPOSE:To improve write accuracy of information data by forming a new annular track in a position over two circuits adjacent to each other among circular tracks recorded alternately one by one circuit with two kinds of signals for tracking servo control and recording a bit of information data to said new track. CONSTITUTION:The two kinds of tracking servo control signals SV1 and SV2 are alternately recorded on a recording surface of a discoid recording medium FD one by one circuit of circular tracks TV. Since then, the new annular track T1 is formed in the position over two circuits adjoining each other among the circular tracks TV and is recorded with the information data Dd in a predetermined unit providing every this unit with a prescribed gap. In this way, the annular track T1 recorded with the information data Dd is such arranged by the two kinds of tracking servo control signals SV1 and SV2 as remaining respectively in each position one both sides of every unit length of the information data Dd, thus enabling write density to be improved on.

Description

[Detailed description of the invention] The present invention will be explained in the following order.

A. Field of industrial application B. Outline of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem 2. Effect G. Example G-1 An example of the information recording method according to the present invention ( Figures 1 to 5
Figure) G-2 Modification H Effect of the Invention A Industrial Field of Application The present invention is a method for storing information data on a disk-shaped recording medium such as a magnetic disk called a floppy disk, accompanied by tracking and servo control signals. Concerning information recording methods.

B. Summary of the Invention The present invention provides an information recording method in which information data is written on a disk-shaped recording medium such as a floppy disk by forming concentric or spiral annular tracks along with tracking and servo control signals. First, two types of tracking/servo control signals are alternately recorded on the recording surface of the disk-shaped recording medium for one round of the annular track, and then the tracking/servo control signals are recorded on the recording surface of the disk-shaped recording medium. A new annular track is formed at a position covering two circumferences of the annular tracks that are adjacent to each other, and information data is recorded in each predetermined unit with a predetermined gap. , the annular track on which information data is recorded is placed at two positions on both sides between each unit of information data.
In this embodiment, the tracking and servo control signals are arranged in such a manner that they remain, respectively, so that an improved information data writing density can be obtained.

C. Prior Art A relatively thin and flexible magnetic disk, usually called a floppy disk, is widely used as a recording medium used in connection with various electronic devices. When recording data, it is necessary to substantially increase its storage capacity (for example, by storing information data on a large number of concentric recording tracks on the recording surface of a floppy disk for tracking and servo control). It has been proposed that information data be written along with signals for tracking and servo control on the recording surface of a floppy disk, thereby making it easier to read information data from a floppy disk. , it is possible to obtain an accurate tracking state for the recording tracks based on the tracking servo control signal, thereby making it possible to narrow the interval between recording tracks and increase the number of effective recording tracks.

FIG. 6 shows a recording format on an example of a floppy disk in which information data is written on concentric recording tracks accompanied by tracking and servo control signals.

It is assumed that the floppy disk FD, on which information data is written such that such a recording formant is obtained, is rotated in the direction shown by arrow R. In the floppy disk FD, the reference angular position P at which the index signal Si is obtained during rotation is
These are the start and end positions of each of the concentric recording trunks T. In each recording trunk T, a first gap part GP1 is provided at the start end side of the recording trunk T. Following this first gear part GPI, a first gap part GP1 Sector data SC1 to nth
A portion is formed in which n pieces of sector data (n is a positive integer) up to sector data SCn are sequentially written, and a second gap portion GP2 is provided at the end portion following the portion, and the first gear A synchronizing signal sy is recorded at a predetermined angular position in the section GPI. Also, first sector data SCI to nth sector data SC
First, identification (ID) data Di indicating the location of each sector is written in the portion where each of n is written, and then information is written in the third gap portion GP3. In addition to writing the vertical data Dd, a fourth gap portion GP4 is formed following the information data Dd. In the fourth gear part GPd of each recording trunk T,
Two types of tracking servo control signals SV and 3v having mutually different frequencies f and f2 are arranged and written in the track width direction with a positional shift of only 1/2 track pitch in the track width direction. There is. Note that predetermined gap data is written into the first gear part GPI other than the recording position of the synchronizing signal sy, the second gap part CP2, and the third gap part GP3.

In this way, for each recording track T, two kinds of tracking servo control signals 3v and 3v2 having frequencies r1 and f2 are applied to each recording track T with a misalignment of only 1/2 track pitch in the track width direction. By being arranged and written in the width direction, the information data D can be read from the FD by the read head.
When d is read, tracking servo control is performed on the read head based on the read output of tracking servo control signals sv1 and Sv2, and the read head is placed in an appropriate tracking state for each recording track T. become.

Conventionally, when writing information to obtain the above-mentioned recording format on a floppy disk FD, first, on the recording surface of the floppy disk FD,
Two types of tracking servo control signals Sv,
and Sv2, in advance, tracking servo control signals Svl and 3v as shown in FIG.
A recording pattern is formed in which two types of tracking servo control signals SV and 3v are recorded in a distributed manner. and,
Next, two types of tracking servo control signals Sv and Sv are recorded.

During each of
In order to form the data at positions shifted by two track pitches in the track width direction, the synchronizing signal sy, the ID data Di and information data Dd forming each of the first sector data SCI to the n-th sector data SCn, and furthermore, the predetermined The recording format shown in FIG. 6 is obtained by interpolating the gap data.

D Problems to be solved by the invention However, as mentioned above, the floppy disk FD
A concentric recording track T on which information data Dd is written is a tracking servo control signal S.
In order to obtain a recording format formed with V and Sv, two types of tracking servo control signals S are first applied to the recording surface of a floppy disk FD.
Only V and Svt are selectively aged in advance to form a recording pattern in which two types of trunking servo control No. 43 Sv and Sv2 are recorded in a dispersed manner, and then the two recorded types of tracking and Sv2 are recorded in a distributed manner. Between each of the servo control signals Sv and Sv, a synchronization signal Sy,
1st sector data SCI to nth sector data SCn
ID data Di and information data Dd forming each of
Furthermore, when an information recording method is used in which predetermined gap data is written, after the tracking servo control signals 3v and Sv are distributed and recorded, the synchronization signal sy and the first sector data SCI ~ ID data D forming each of the n-th sector data SCn
i and the information data Dd, and furthermore, when filling in predetermined gap data, at a position corresponding to the fourth gap part GPd forming the terminal part of each of the first sector data SCI to the n-th sector data SCn. Since it is necessary to arrange the tracking servo control signals Sv and Sv2, the rotation control of the floppy disk FD, the transfer rate control of the data to be written, etc. are performed under high load conditions. will be required to be done. As a result, various control systems in the recording apparatus to which the floppy disk FD is installed become complicated, and as a result, the recording apparatuses become of the same price.

In view of the above, the present invention provides a disk-shaped recording medium such as a floppy disk, in which concentric or spiral annular tracks on which information data is written are arranged on both sides between each unit of written information data. A recording format in which two types of tracking and servo control signals are arranged at respective positions is not required to control the rotation of a disk-shaped recording medium with particularly high precision, and the recording format has been improved. It is an object of the present invention to provide an information recording method that enables information data to be obtained with a high writing density.

E. Means for Solving the Problems In order to achieve the above-mentioned object, the information recording method according to the present invention provides two types of tracking servo control signals on the recording surface of a disk-shaped recording medium, respectively, in a circular trunk. is formed, and the two types of tracking servo control signals are applied to the recording surface of the disk-shaped recording medium alternately for each rotation and for the entire circumference of each rotation, and then the two types of tracking servo control signals are applied for one rotation each on the recording surface of the disk-shaped recording medium. New annular tracks are formed at positions over two adjacent circumferences of the alternately written annular tracks, and information data is recorded in predetermined units with predetermined gaps. be taken as a thing.

F-effect In the disk-shaped recording medium on which information is written by the information recording method according to the present invention as described above, 2
For seed tracking and servo control (after a circular track is formed in which each No. 8 is written alternately over the entire circumference of each circle, a new circular track in which information data is written is formed, and a new circular track in which information data is written is In this manner, two types of tracking and servo control signals are left and arranged at positions on both sides between each unit, so that improved information data writing accuracy can be obtained. In order to include such information data, particularly high precision is not required for controlling the rotation of the disk-shaped recording medium.

G Example G-1 An example of the information recording method according to the present invention (Figs. 1 to 5)
Figure 1 shows a recording system used to implement an example of the information recording method according to the present invention. In this example of the information recording method, information is written in a recording format as shown in Figure 6. In the recording system shown in FIG. 1, which is said to be for obtaining a floppy disk, the floppy disk is driven to rotate, and information is written to and read from the recording surface of the disk recording system. /A reproduction device 20 is provided. This disc recording/playback device 20 includes a disc recording/playback controller 21 and a format controller 22.
The disk recording/playback controller 21 and the format controller 22 each exchange data with a host computer 23 and are controlled by the host computer 23. It is placed.

When recording information according to an example of the information recording method according to the present invention using such a recording system, first, the disk recording/reproducing device 2o is supplied with a control signal Sf from the format controller 22. Assume that information can be written to the floppy disk in various states. Further, the servo control signal generating section 24 is put into an operating state by the control signal Sc from the format controller 22, and the first signal having the frequency r1 is output from the servo control signal generating section 24.
, and a second tracking servo control signal SV having a frequency f2 (f,>r,). Then, in response to the switch control signal Ss from the format controller 22, the write information changeover switch 25 is activated so that its movable contact 25a receives the first and second tracking signals from the servo control signal generator 24.
The first and second tracking servo control signals 3v and Sv2 from the servo control signal generating section 24 are connected to the selection contact 25b to which the servo control signals Svl and Sv2 are supplied.
The information is supplied to the disc recording/reproducing device 20 through the write information changeover switch 25. Further, at this time, a NAND gate section 26 to which the write command signal Sw from the disk recording/playback controller 21 is supplied to one of the input terminals of the pair.
The gate control signal Sg from the format controller 22 is supplied to the other of the input terminals of the pair.
is maintained at a low level, so that the write command signal Sw from the disc recording/reproducing controller 2 is supplied to the disc recording/reproducing device 20.

Under such conditions, the disc recording/playback device 20
, first and second tracking servo control signals Sv and 3v from the servo control signal generator 24 for the recording surface of the floppy disk;
The writing is performed based on the write command signal Sw from the disk recording/playback controller 21. In writing the first and second tracking servo control signals Svl and 3v2, as shown in FIG. A plurality of concentric recording trunks TV are formed, each starting and ending at a reference angular displacement iP at which an index signal Si is obtained during rotation, and the first recording trunk TV from the servo control signal generating section 24 is
and second tracking servo control signal S
v1 and 3v, respectively, on a concentric recording track TV
The data is written alternately and continuously, that is, over the entire circumference of each cycle. As a result, as shown in FIG. 3, a large number of concentric records are created in which the first tracking servo control signal SvI and the second tracking servo control signal 3v2 are alternately written four times one round at a time. A floppy disk FD on which tracks Tv are formed is obtained.

Next, by changing the switch control signal SS from the format controller 22, the write information changeover switch 25 is set so that its movable contact 25a is a selection contact to which the write data DT from the disk recording/playback controller 21 is supplied. 25c, the write data DT from the disk recording/playback controller 21 is transferred to the disk recording/playback device 2 through the write information changeover switch 25.
Supply to 0. This write data DT is a clock pulse Pc as shown in FIG.
and disc recording/playback device 20
Timing control is performed according to the index signal S1 obtained every rotation of the Fronbi disk FD, and for example, as shown in FIG. As shown in FIG. B, write data DT for one recording track is obtained between the leading edge of one of the two adjacent index signals St and the leading edge of the other. In the write data DT for this engineering record trunk, the first gap data G1 including the synchronization signal sy is located from the starting end side,
Subsequently, the first sector data SCI, second sector data SC2, . . . are arranged in sequence, and the second gap data Gt is located at the end. Then, first sector data SC1, second sector data SC2.
... are the ID data pi and the third gap data G.
z, information data Dd, and fourth gap data G4.

Also, at this time, the disk recording/playback controller 21
As shown in the second diagram, a write command signal SW is supplied to one of the input terminals of the NAND gate unit 26, which is maintained at a high level during the period in which write data DT for one recording track is obtained. Furthermore, the clock pulse Pc supplied from the clock generator 27 to the disk recording/reproducing controller 21 is also supplied to the counter 28,
8, the clock pulses Pc are counted, and the format controller 22 monitors the count value of the counter 28 based on the leading edge of the index signal Si obtained from the disk recording/reproducing device 20, and uses the monitoring result as a reference. Based on the disc recording/playback controller 21
The first sector data SCI and the second sector data SC2 in the write data DT for l recording tracks sent from
The timing of the third gear data G3 in each of... is detected. Then, based on the detection result, the gate control signal Sg is sent to the first sector data SCI, second sector data SC2, . . . in the occupied data DT for one recording trunk, as shown in FIG. The third gap data G! It is supplied to the other input terminal of the NAND gate section 26 as having a high level at the timing of . As a result, the write command signal Sw is sent from the lead gate section 26 to the third gap in each of the first sector data SCI, second sector data SC2, etc. in the write data DT for one recording track. At the timing of data G, it is assumed to be at a low level and is supplied to the disc recording/reproducing device 20.

Under such conditions, the disc recording/playback device 20
As shown in FIG. 3, the first and second tracking servo control signals Sv and Svz
The old write data DT is written onto the recording surface of the floppy disk FD, where the four writings are performed alternately one round at a time on the recording track TV. This writing data DT is written on the floppy disk FD as shown in FIG.
is rotated in the direction shown by the arrow R, and two adjacent recording tracks TV on the recording surface in which the first and second tracking servo control signals SvI and 3v2 have been written, respectively. A new concentric recording track T° is formed between the two, and the magnetic head used to form the new recording track T is indicated by an arrow H as shown in FIG. In the direction of movement of the eraser, there is an erasing gap 29 that precedes and has a relatively long gap length, and a δ feeding gap 3 that follows the erase gap 29 and has a relatively short gap length.
0. By using such a magnetic head, on the recording surface of a floppy disk FD,
First and second tracking servo control signals 3v, respectively.

The portion that spans both of the two adjacent recording tracks TV, which are filled with 3v and 3v, is the erasing gap 29.
The write data DT is erased with a width We corresponding to the gap length of the write gap 30, and then the write data DT is written with a width Wr corresponding to the gap length of the write gap 30.

In applying the write data DT, for each round of the newly formed recording track T', the write data DT for one round of the recording track as shown in FIG. - The write command signal Sw from the gate section 26 becomes obsolete under a state where it takes a high level. At this time, the write start position and write end position in each recording trunk T'' are set to the reference angular position P from which the index signal Si is obtained.

At this time, as shown in FIG. 2E, the gate control signal Sg is applied to the first sector data SC1, the second sector data SC2, and the second sector data SC2 in the write data DT for one recording trunk.
The write command signal Sw from the NAND gate section 26 is assumed to take a high level at the timing of the fourth gap data G4 in each of..., and thereby the write command signal Sw from the NAND gate section 26 is set to the first sector in the write data DT for one recording track. Data SC1
゜The third in each of the second sector data SC2...
Since the gap data G is assumed to take a low level at the timing, the write data D for one recording trunk
The third gap data G in each of the first sector data S01, second sector data SC2, . . . in T is not written to the newly formed recording track T'.

That is, in each round of the newly formed recording track T°, the first sector data sci in the write data DT,
A cut-out portion is formed in a portion corresponding to the third gap data G in each of the second sector data SC2..., and in this cut-out portion, the first and The tracking servo control signals SvI and 3v of 2 are left as they are.

In this way, by writing the write data DT for each recording track four times in one rotation of the newly formed recording track T', it is written on the recording surface of the floppy disk FD as shown in FIG. The concentric recording track T' on which the write data DT has been written is tracked by first and second tracking tracks having frequencies "1" and "r2", respectively.
The servo control signals 3v and 3v2 are arranged in the track width direction and have aged portions at predetermined angular intervals, with a positional shift of only 1/2 track pitch in the trunk width direction. In the state
It will be possible to form.

That is, in each recording track T shown in FIG.
A first gap portion GPI is formed in which first gap data G1 including
Following I, n pieces of sector data (n is a positive integer) from the first sector data SCI to the n-th sector data SCn are indented in sequence, and further, second gap data G, A second gap portion CP2 in which is written is provided. In the portion where each of the first sector data SCI to nth sector data SCn are written, fD data Di is written first, and then third gap data G is written. information data Dd with the third gap GP3
is written therein, and a fourth gap portion GP4 is formed following the information data Dd. In this fourth gear part GPd, first and second tracking servo control signals 3v and Sv2 having mutually different frequencies f and f2 are transmitted only by 1/2 track pinch in the track width direction. They are arranged in the track width direction and filled in, with some misalignment.

In the example shown in FIG. 5, the recording track T
The erased portion Ei of the first tracking servo control signal SV and the erased portion Ei of the second tracking servo control signal SV are located outside the outermost circumference and inside the innermost circumference. are formed concentrically.

As described above, according to one example of the information recording method according to the present invention, information data substantially equivalent to that shown in FIG. It is possible to obtain a recording format that is traversed in concentric recording tracks.

G-2 Modification In the above example, the recording tracks formed on the recording surface of the floppy disk are concentric circles, but when a spiral recording trunk is formed on the recording surface of the floppy disk, The present invention can also be applied by making each round of the spiral recording track correspond to each of the concentric recording tracks.

H Effects of the Invention As is clear from the above explanation, the information recording method according to the present invention allows information data to be recorded in a circular shape such as a concentric circle or a spiral shape on a disk-shaped recording medium such as a floppy disk. A recording format in which a track is formed in such a manner that two types of tracking servo control signals having mutually different frequencies are arranged on both sides of each unit of written information data.
Exceptionally high accuracy is not required for controlling the rotation of a disk-shaped recording medium, and it is possible to obtain improved information data writing density. Further, as a result, it is possible to simplify various control systems in a recording device into which a disk-shaped recording medium is mounted, and to reduce the cost of the recording device.

[Brief explanation of the drawing]

FIG. 1 is a block connection diagram showing a recording system used to implement an example of the information recording method according to the present invention, and FIG. 2A-
E is a waveform diagram used to explain an example of the information recording method according to the present invention, and FIGS. A diagram used to explain the cloak, Figure 4 is the first
FIG. 6, which is a diagram used to explain the magnetic head used in the disk recording/reproducing apparatus of the recording system shown in the figure, is a diagram showing an example of a recording format on a floppy disk. In the figure, 20 is a disk recording/reproducing device, 21 is a disk recording/reproducing controller, 22 is a format controller, 24 is a servo control signal generator, and FD is a floppy disk. 88 Recording System Figure 1 Waveform diagram for explaining an embodiment of the gap of the magnetic head used in the recording system Figure 2 Intermediate recording format according to the embodiment Figure 3 Figure 5

Claims (1)

[Claims] There are two types of tracking on the recording surface of the disk-shaped recording medium.
Each of the servo control signals is formed into an annular track and alternately and continuously recorded for one revolution of the annular track, and then the tracking servo control signals on the recording surface of the disk-shaped recording medium are recorded. Forming new annular tracks at positions over two mutually adjacent circumferences of the recorded annular tracks,
An information recording method characterized in that information data is recorded in predetermined units with predetermined gaps provided.