JPH0773576A - Disk drive device - Google Patents

Abstract

PURPOSE:To discriminate a specification of a different disk cassette without changing a shape and the like by controlling characteristics of a read/write circuit and a servo circuit based on disk specification information recorded in a specific region of a disk. CONSTITUTION:An information track in which information corresponding to a specification of a disk is recorded is provided in a specific region on a disk medium, when a disk is loaded in a device, a head 1 is switched to a reproducing side by rotating it. Next, the head 1 is moved to an information track, a format and a characteristic of the disk are discriminated, switching and characteristics of reproduced and recorded data processing circuits 4 and 6 are changed in accordance with read information. Further, after a characteristic of a tracking servo is set based on various control information, operation is started, and the circuits 4 and 6 are controlled in accordance with a control command of a host computer 11. Thereby, plural disk cassettes having different specifications can be discriminated without changing a shape and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium identification of a medium exchangeable disk device having a servo mechanism for tracking by a pattern signal formed on a data recording surface.

[0002]

2. Description of the Related Art Conventionally, a disc medium used in a 3.5-inch floppy disc drive (FDD) or the like is discriminated by a medium discriminating hole provided in a disc cassette by a microswitch or the like provided in the disc device side. Was taken.

[0003]

However, in the method as in the above-mentioned conventional example, the identification is performed only by the identification hole of the disk cassette, so that a plurality of different specifications (track density, servo pattern system, If there is a format capacity etc., it cannot be determined which drive specifications the cassette is compatible with. Especially, in a device having a medium servo / format function, a similar disc with different magnetic magnetism is inserted in the disc drive device itself. In that case, there is a drawback that the servo / format is erroneously used.

It is also conceivable that a disc cassette discriminating hole is provided for each disc having different specifications. In this case, however, there are various types of discs currently announced, and disc disc cassettes are perforated for discrimination. The way to do is impractical and virtually impossible.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and reliably discriminates corresponding media between disk devices that process media of various different specifications in the same cassette. A specific position on the disc medium is defined as an "information track", the track is divided and assigned to each disc specification, and information corresponding to each disc specification is read in that area by each drive itself. By recording possible information, when the disc cassette is inserted into the disc device, it is possible to seek the above information track and confirm whether or not the information corresponding to the own drive is stored. It was done.

[0006]

As a result, it is possible to identify a plurality of types of disc media without changing the shape of the disc cassette.

[0007]

Embodiments of the disk drive device according to the present invention will be described in detail below with reference to the drawings.

1 and 2 are diagrams showing the disk formats on the recording surfaces of disks having different formats. As is clear from each figure, the number of tracks Tm
a, Tmb, and Tnc are different from each other, and the numbers of sectors a, b, and c are also different from each other.

Further, one track is composed of a plurality of sectors, and a tracking servo pattern for automatically controlling the head position with respect to the track is formed between the sectors. In the example of FIG. 1, signals having the same wave numbers F ₁ and F ₂ that are different from each other are alternately recorded by shifting the data tracks by a half track pitch. This is a servo pattern called a dual frequency system. In addition, a servo pattern called a staggered burst system, in which the four burst patterns in the examples of FIGS. 2 and 3 are arranged in a shifted manner in the time direction, that is, the longitudinal direction of the track, is applied.

Further, the pulse waveform shown at the uppermost part in each figure shows the detection output of the index hole for detecting the recording start position of the disk medium, that is, the rotation phase.

Hereinafter, description will be made using a disk medium having a format as shown in FIGS. That is, when different disk specifications (disk capacity, servo method, track density, recording method, linear recording density, etc.) exist in the same cassette shape (for example, 3.5 inch FD cassette),
An information track (INF, TRACK) is provided on the outer circumference of the outermost track of the medium (usually called track 0).
This track is divided into m parts, each position is assigned to each disk specification, and information readable by a disk drive device corresponding to each disk specification is recorded in this part, and the disk is a drive device. When it is inserted into the drive, the drive device reads the corresponding position of the drive specifications assigned to the information tracks on the medium and confirms that the drive is a medium that can be processed, and then performs the track servo, etc. . Therefore, on the side of the disc drive device, where in the area 1 to m on the information track the signal is recorded, and the recorded contents,
The specifications of the disc can be discriminated from the recording state, and reading and writing can be performed according to the information. Moreover, since the track width of the information track varies depending on the specifications, a track and a space that can handle even the maximum width are secured.

FIGS. 4, 5, and 6 show examples in which the drive device itself has a servo write function. In this case, the information corresponding to the drive recorded on the information track on the medium is read and confirmed for processing.

7 to 10 show the positional relationship of the information tracks on the disk medium. In each of FIGS. 7 to 10, the information track is set to the outermost track of the disk medium, for example, 12 areas (m = 12). ) Is divided into.

In the disk medium shown in FIG. 7, a predetermined signal pattern such as a burst signal is recorded in the area of m = 3. Similarly, in the example of FIG. 8, a predetermined signal pattern different from the signal pattern of FIG. 7 is recorded in the area of m = 2.

FIG. 9 is an example showing another disk format using the signal patterns of FIGS. 7 and 8.
In this way, it is possible to identify various disc formats by making the used area of the plurality of areas on the information track and the information or signal pattern written in the area different.

FIG. 10 is a block diagram showing the configuration of a disk drive device which reads the information track formed on the disk as described above and changes the read / write characteristics and the heading servo characteristic in accordance with the disk format. FIG. 11 is a flow chart showing the operation.

In FIG. 10, 1 is a read / write head, 2 is a read / write changeover switch for selectively connecting the head to a read amplifier and a write amplifier in accordance with read and write operations, 3a read amplifier, and 4 is a read amplifier. A reproduction data processing circuit for discriminating data from the reproduction signal output from the amplifier 3 can change its reproduction equalizer characteristic, a data signal read clock, and the like based on a control signal from a controller described later.

Reference numeral 5 is a write amplifier, and 6 is a recording data processing circuit for outputting a recording data signal to the write amplifier 5, which also has its recording equalizer characteristics, a data signal writing clock, etc. based on a control signal from a controller described later. Can be changed.

Numeral 7 moves the head position on a track-by-track basis in accordance with a control signal output from a controller, which will be described later, and detects a head tracking servo pattern recorded between each sector in the reproduced signal to constantly move the head. It is a head movement and tracking control circuit for on-tracking on the traced track.
Reference numeral 8 denotes an actuator such as a voice coil or a pulse motor which controls the movement of the head according to the head movement / tracking control circuit 7.

Reference numeral 9 denotes a controller that generally controls the disk drive device according to a control command from a connected host computer. The controller 9 switches the switch 2 according to a control command from the host computer to switch the read / write mode, and discriminates the disc format, various characteristics and the like based on the information read from the information track on the disc, and The characteristics of the reproduction data processing circuit 4, the characteristics of the recording data processing circuit 6, the head movement and the sampling clock for reading the servo pattern of the tracking control circuit 7 are changed according to the identification information, and the reproduction data signal is sent to the host computer. Is performed or various kinds of processing such as recording data input from the host computer is performed. Reference numeral 10 denotes an interface for connecting the host computer 11 and the controller 9 of the disk drive device to input / output various data signals and control command signals.

Next, the operation performed by the controller of the disk drive device will be described with reference to the flow chart of FIG.

When the process is started,
In step S1, the loading of the disc is detected. If the loading is detected, the process proceeds to step S2 to rotate the disc, and in step S3 the head is switched to the reproducing side and the head is moved onto the information track. , Disc format and characteristics are identified.

Then, in step S4, the read data processing circuit and the write data processing circuit are switched and the characteristics are changed in accordance with the information read from the information track in step S3, and the disc recorded in the information track in step S5. The tracking servo characteristic is set based on various control information such as the warm mat and the number of recording tracks, and the tracking servo operation is started in step S6.

In step S7, the host computer 1
It is determined whether the control command from the 1 side is a read command or a write command, and the reproduction data processing circuit 4 is controlled according to the determination result (step S7).
The recording data processing circuit 6 is controlled (step S10).

In step S11, the host computer 1
It is determined whether or not the access operation by the various control commands from 1 is completed, and if the access is not completed, the process proceeds to step S7 and the control command from the host computer is awaited.

If the access operation by the various control commands from the host computer 11 is completed in step S11, the process is completed.

As described above, according to this embodiment, by changing the read / write characteristics of the disk drive and the servo pattern reading characteristics in accordance with the identification data recorded in the information tracks on the disk medium, the cassette is read. It is possible to support multiple disc formats without changing the shape.

Although the information track is located outside (outer circumference) of the recording / reproducing track in the above embodiment, it may be located inside (inner circumference) or may be provided in part of the other recording / reproducing track. .

Further, in this embodiment, the information track is provided on one side (sidero) of the disc, but it may be provided on the side 1 side, or may be provided on both sides for the purpose of sure reading.

The same information may be recorded in the same information track a plurality of times. It is also possible to record the copy prohibition information and the like of the disc sold with the application software (program) in the information track for use.

[0031]

As described above, by recording the information corresponding to the kind of disc specifications in the predetermined area on the disc medium, It is possible to process with the same cassette without providing media with different specifications.

2. In particular, in a system in which the drive device itself can perform servo writing and formatting, it is possible to confuse the market by using the system in which information is recorded at the corresponding position of the information track, and the current 1M / Servo / formatting with respect to a disk medium such as 2 MB is also eliminated. And so on.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a track layout of a disc format and information tracks.

FIG. 2 is a diagram showing an example of a disk format having specifications different from those in FIG.

FIG. 3 is a diagram showing an example of a disc format having specifications different from those of the discs of FIGS. 1 and 2;

FIG. 4 is a diagram showing an example of a format of an information track.

5 is a diagram showing an example of an information track different from FIG.

FIG. 6 is a diagram showing an example of an information track different from FIGS. 4 and 5;

FIG. 7 is a diagram showing a relationship between a recording / reproducing area and an information track on a disc medium.

FIG. 8 is a diagram showing a disk medium having specifications different from those in FIG.

FIG. 9 is a diagram showing a disk medium having specifications different from those in FIGS. 7 and 8;

FIG. 10 is a block diagram showing a configuration of a disk drive device of the present invention.

11 is a diagram showing a control operation of the disk drive device of FIG.

Claims (1)

[Claims] 1. A disk drive device using a disk medium in which disk medium identification information is recorded in a specific area of a data recording surface, the disk medium identification information is read according to loading of the disk medium, and the read disk A disk drive device characterized by being configured to control read / write characteristics and drive characteristics of the disk drive device based on medium identification information.