JPH11306660A - Disk driving device and disk driving control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compatibly use a first magnetic disk on which a servo signal recording area having ruggedness or the like is formed and a second magnetic disk having a flat surface. SOLUTION: Relating to this device, a first magnetic disk 3A on which a servo signal recording signal recording area having minute ruggedness or the like is formed and a second magnetic disk 3B having a flat surface are compatibly used. The recording and reproducing of an information signal or the like is performed by a magnetic head mechanism 23 having a floating characteristic with respect to a loaded disk 3. The specification of the loaded disk 3 is detected by a disk discriminating part 26 and when the first magnetic disk 3A is detected, the device rotatingly drives the first magnetic disk 3A at a speed higher than that of the second magnetic disk 3B by a rotary driving mechanism 22 to enhance the floating force of a magnetic head mechanism 23 and it suppresses the reduction of a floating height due to the influence of the servo signal recording area having the ruggedness or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called removable disk drive device which is attached to an information processing apparatus, an image processing apparatus or the like to constitute an external storage device or the like, and in which a disk cartridge containing a magnetic disk is freely replaceable. More particularly, the present invention relates to a disk drive device and a disk drive control method capable of using a magnetic disk of a high density recording specification and a magnetic disk of a low density recording specification interchangeably.

[0002]

2. Description of the Related Art Removable disk drive devices are:
A disk cartridge in which a magnetic disk is rotatably incorporated in a cartridge body is used interchangeably, and constitutes an external storage device such as an information processing device or an image processing device. Removable disk drive devices are exchangeable disk drive devices with large storage capacity,
It has features such as high-speed access and high transfer rate.

A disk drive device includes a disk rotation drive mechanism for rotating a magnetic disk housed in a disk cartridge and a magnetic head mechanism for recording an information signal or the like on the magnetic disk or reproducing the recorded information signal or the like. Provided. The disk rotation drive mechanism includes a spindle motor, a disk table attached to a rotation shaft of the spindle motor, and a magnetic table for magnetically chucking a magnetic disk.

[0004] The magnetic head mechanism comprises a head arm which is rotated by a head drive motor, and a magnetic head assembly attached to the tip of the head arm. The magnetic head structure includes a suspension including a load beam and a gimbal spring, a slider, a head chip attached to the slider, and members such as a load / unload bar. The magnetic head mechanism is normally held in an unloaded state at a position retracted from the magnetic disk by the load / unload bar being relatively engaged with a ramp provided on the apparatus body side. When a recording operation or a reproducing operation of an information signal or the like is performed, the magnetic head mechanism is rotated by a head driving motor, the engagement state of the load / unload bar and the ramp is released, and the slider is moved on the main surface of the magnetic disk. Is brought into contact with the load.

[0005] The disk cartridge comprises a thin box-shaped cartridge body and a magnetic disk rotatably housed inside the cartridge body. The disk cartridge has a recording / reproducing opening formed on one side of the cartridge body to allow the magnetic head mechanism to enter, and a center hub attached to the center hole of the magnetic disk at the center of one main surface. An opening for chucking is formed so as to face. The recording / reproducing opening of the disk cartridge is usually closed by a shutter member.

[0006] The disk cartridge constructed as described above is loaded into the recording / reproducing section from the loading port of the disk drive. In the disk drive device, the shutter member of the disk cartridge is driven by the shutter opening mechanism to open the recording / reproducing opening. In the disk drive device, when a recording and / or reproducing operation is performed, the magnetic head mechanism enters into the inside from the recording / reproducing opening opened to the disk cartridge. The disk drive device records an information signal or the like by a magnetic head mechanism on a magnetic disk rotated and driven by a disk rotation drive mechanism or reproduces the recorded information signal or the like.

[0007]

In a disk drive device, when a magnetic disk is driven to rotate while a slider of a magnetic head mechanism is in contact with a main surface, an air flow generated between the main surface and the slider causes a magnetic flow. The head mechanism generates a floating force. In the disk drive device, the slider of the magnetic head mechanism is thereby kept at a minute interval of, for example, about 0.1 μm between the main surface of the magnetic disk and records information signals and the like on the magnetic disk via the head chip. Or reproduce a recorded information signal or the like. The magnetic head mechanism improves reliability by reducing wear or suppressing damage to the head chip and the magnetic recording layer even when the magnetic disk is rotated at a high speed.

Meanwhile, a conventional general magnetic disk is configured such that a magnetic recording layer having a uniform thickness is formed on a main surface of a disk substrate made of a glass substrate or an aluminum substrate. 2. Description of the Related Art In a magnetic disk, high-density recording of information signals and the like is attempted. For example, a so-called PERM disk (Pre-Embossed Rigid Magnet) formed by forming fine irregularities on a main surface of a disk substrate.
tic Disk) has been proposed. In this specification, a PERM disk is referred to as a first magnetic disk, and a conventional general magnetic disk is referred to as a second magnetic disk.

In the first magnetic disk, guard band grooves are formed concentrically between data tracks, and fine servo signals and the like are recorded in a servo signal recording area for recording track addresses and track king position information. An uneven groove is formed. Therefore, the first magnetic disk is configured not as a uniform plane but as a plane having fine irregularities, like the second magnetic disk.

As described above, the magnetic head mechanism generates a levitation force by the air flow generated between the slider and the main surface of the magnetic disk which is rotationally driven. Recording and / or reproduction. As described above, when recording and / or reproducing information signals and the like is performed on the second magnetic disk whose main surface is formed as a uniform plane as described above, the flying height is kept constant. You. On the other hand, when performing recording and / or reproduction of an information signal or the like on the first magnetic disk whose main surface is configured as a plane having fine irregularities, the magnetic head mechanism has a flying height of the irregular shape. It fluctuates under the influence.

That is, the levitation force on the magnetic head mechanism changes according to the load capacity of the airflow generated between the slider and the main surface of the magnetic disk. The flying force decreases as the distance between the slider and the main surface of the magnetic disk increases. In a magnetic head mechanism, a slider is pressed against a main surface of a magnetic disk by a suspension with a fixed load. The magnetic head mechanism maintains a constant flying height relative to the main surface of the magnetic disk by balancing the elastic force of the suspension and the floating force due to the air flow.

Therefore, in the disk drive device, when the first magnetic disk is loaded, the flying height of the magnetic head mechanism is reduced due to the influence of the main surface constituted by the flat surface having fine irregularities. A phenomenon that the magnetic head mechanism contacts the first magnetic disk may occur. As a result, in the disk drive device, the durability of the magnetic head mechanism and the magnetic disk is deteriorated, and at the same time, a situation such as damage of valuable information signals recorded on the magnetic disk may occur.

In consideration of a decrease in the flying height when the first magnetic disk is loaded, for example, the disk drive device may be configured so that the flying height of the magnetic head mechanism with respect to the magnetic disk is set higher. Is done.
However, when such a configuration is adopted, the disk drive device, when the second magnetic disk is loaded, increases the magnetic spacing between the head chip of the magnetic head mechanism and the main surface of the magnetic disk, thereby increasing the magnetic efficiency. And it becomes difficult to achieve high-density recording of information signals and the like.

Therefore, the present invention is intended to be used interchangeably with a first magnetic disk in which an uneven servo signal recording area or the like is formed on a main surface and a second magnetic disk in which the main surface is formed as a substantially flat surface. The present invention has been proposed for the purpose of providing a disk drive device and a disk drive control method for recording and / or reproducing an information signal or the like with high accuracy by making it possible.

[0015]

According to the present invention, there is provided a disk drive apparatus comprising: a first magnetic disk having a main surface on which a servo signal recording portion or the like having fine irregularities is formed; Is loaded with a second magnetic disk having a substantially flat surface, and when the loaded magnetic disk is driven by a rotary drive mechanism, recording and / or reproduction of information signals and the like is performed by a magnetic head mechanism having flying characteristics. Done. The disk drive device has a rotary drive mechanism,
The first magnetic disk is rotationally driven at a high speed with respect to the second magnetic disk.

According to the disk drive device of the present invention having the above-described structure, the magnetic head mechanism is provided with a servo signal recording portion or the like having fine irregularities formed on the main surface with respect to the first magnetic disk. Although the flying height decreases due to the influence, the floating force is increased by rotating the first magnetic disk at a high speed by the rotation drive mechanism. Therefore, in the disk drive device, since the magnetic head mechanism is held at a substantially equal flying height with respect to the first magnetic disk and the second magnetic disk, it is possible to prevent the occurrence of a head crash and the like and to improve Recording and / or reproduction of information signals and the like recorded at high density by magnetic efficiency are performed with high accuracy.

Further, in the disk drive control method according to the present invention, which achieves the above-mentioned object, a first magnetic disk in which a servo signal recording portion having fine irregularities is formed on a main surface and a substantially flat main surface are provided. The second magnetic disk is used interchangeably, and the loaded magnetic disk is driven by a rotary drive mechanism, and recording of information signals and the like is performed by a magnetic head mechanism having flying characteristics with respect to the magnetic disk driven to rotate. And / or regenerate. According to the disk drive control method, when the first magnetic disk is loaded, the first magnetic disk is controlled to be rotationally driven at a high speed with respect to the second magnetic disk by a rotational drive mechanism.

Therefore, according to the disk drive control method of the present invention, the magnetic head mechanism is affected by the servo signal recording portion and the like formed on the main surface of the first magnetic disk. Although the flying height is reduced, the flying force is increased by rotating the first magnetic disk at a high speed by the rotation drive mechanism. Therefore, according to the disk drive control method, the magnetic head mechanism maintains the flying height of the first magnetic disk substantially equal to that of the second magnetic disk, thereby preventing the occurrence of a head crash and the like, and Recording and / or reproduction of information signals and the like recorded at high density with high magnetic efficiency are performed with high accuracy.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. As an embodiment of the present invention, the disk drive device 20 is attached to an information processing device, an image processing device, or the like to constitute an external storage device,
As shown in FIG. 1, a disk cartridge 1 containing a magnetic disk 3 as a storage medium is removably loaded.
This is a so-called removable disk drive device.
The disk drive device 20 includes the disk cartridge 1
The first disk cartridge 1A and the second disk cartridge 1B are used interchangeably.

The first disk cartridge 1A has a first magnetic disk 3A rotatably housed inside a cartridge body 2. Further, the second disk cartridge 1B has a second magnetic disk 3B rotatably housed inside the cartridge body 2. The first disk cartridge 1A and the second disk cartridge 1B, and the first magnetic disk 3A and the second magnetic disk 3B, as described above, except as described individually, Shall be collectively referred to as

FIG. 2 and FIG.
As shown in FIG.
A magnetic disk 3 rotatably housed inside the cartridge body 2, a shutter member 5 for opening and closing a recording / reproducing opening 4 formed by opening one side of the cartridge body 2, and the like. The cartridge body 2 is formed with a circular chucking opening 5 located substantially at the center, together with the recording / reproducing opening 4 described above.
The disk cartridge 1 has a disk cartridge 1
Is provided with a specification discriminating section 7 for discriminating whether the disc is the first disc cartridge 1A or the second disc cartridge 1B. When the disk cartridge 1 is the first disk cartridge 1A, the specification identifying section 7 has a configuration in which a circular small hole is provided in the cartridge main body 2 as shown in FIG. When the disk cartridge 1 is the second disk cartridge 1B, the specification identifying section 7 does not have a small hole in the cartridge body 2.

The magnetic disk 3 includes a disk substrate 8 made of a glass substrate or an aluminum substrate, on which a recording portion for information signals and the like is formed on a main surface 3a, and a center hub 9 attached to a center hole 8a of the disk substrate 8. Consists of When the magnetic disk 3 is the second magnetic disk 3B, the main surface 3a is formed as a plane that is entirely uniform. The magnetic disk 3 is a first magnetic disk 3
If it is A, its main surface 3a will be described in detail later.
Is formed as a flat surface on which fine irregularities and grooves are formed.
The second magnetic disk 3B is a conventional general magnetic disk, and has a magnetic recording layer formed with a uniform thickness on the main surface of the disk substrate 8.

In the disk cartridge 1, the magnetic disk 3 is rotatably accommodated in the cartridge body 2 with the center hub 9 facing outward from the chucking opening 5. In the disk cartridge 1, the recording / reproducing opening 4 is normally closed by a shutter member 5.
When the disc cartridge 1 is loaded into the disc drive device 20 as described later, the shutter member 5 is rotated by the shutter opening mechanism to open the recording / reproducing opening 4. In the disk cartridge 1, the magnetic head mechanism 23 enters the inside of the cartridge main body 2 from the opened recording / reproducing opening 4.

FIGS. 4 and 5 show the first magnetic disk 3A.
As shown in FIG.
A recording area 10 for information signals and the like is formed on the main surface of the recording medium. The first magnetic disk 3A has fine irregularities formed on its main surface 3a by a stamping technique used when manufacturing an optical disk or the like in the recording area 10.
That is, on the first magnetic disk 3A, concentric data recording tracks 11 are divided by guard bands 12 each formed of a groove having a constant depth. On the first magnetic disk 3A, a servo signal recording area 13 is formed radially in a part of the recording area 10.

The servo signal recording area 13 is an area in which servo signal information such as track address and tracking position information is recorded. As shown in FIG. 5, on the circumference of the data recording track 11 adjacent in the radial direction, The servo signal recording portion 14 is formed by the fine convex portions 14a and the concave portions 14b formed over the region. Each servo signal recording unit 14
Is formed in such a manner that the convex portions 14a and the concave portions 14b are magnetized in different directions in advance as indicated by arrows in FIG.

In the first magnetic disk 3A configured as described above, each data recording track 11 has a guard band 1
2, the magnetic head 3 described later.
6, magnetic interference between adjacent data recording tracks 11 caused by the lateral leakage magnetic field is suppressed. Therefore, on the first magnetic disk 3A, high density recording of information signals and the like is achieved by making the track pitch of each data recording track 11 dense. Also, the first magnetic disk 3A is
When the magnetic head 36 detects the magnetization reversal portion of the servo signal recording area 13 formed by the convex portion 14a and the concave portion 14b, the reproduced output is used as a servo signal to perform a seek control operation to the target data recording track 11 or a predetermined data. A tracking control operation on the recording track 11 is performed.

As shown in FIGS. 1 to 3, the disk drive device 20 has a cartridge loading port 21 for loading the disk cartridge 1 on one side surface, a disk rotation drive mechanism 22, a magnetic head mechanism 23,
A mechanical unit such as a head driving mechanism 24 and a head holding mechanism 25 is provided, and further, a disk identification unit 26 and a control unit 27 are provided. Disk rotation drive mechanism 22
Is provided substantially at the center of the cartridge loading space 20a of the disk drive device 20, and the spindle motor 28
And a disk table 29 provided on the rotating shaft. The disk table 29 is provided with a magnet (not shown), which attracts the center hub 9 of the magnetic disk 3 and positions and holds the center hub 9.

When the disk cartridge 1 is loaded from the cartridge loading port 21 into the cartridge loading space 20a, the disk rotation drive mechanism 22 positions the magnetic disk 3 on the disk table 29 by magnet-chucking the center hub 9. Hold. When a recording operation or a reproducing operation is performed, the disk rotation drive mechanism 22 drives the spindle motor 28 to rotate the magnetic disk 3. The rotation speed of the disk rotation drive mechanism 22 is controlled by the control unit 27 according to the first disk cartridge 1A and the second disk cartridge 1B, as will be described in detail later.

As shown in FIGS. 1, 2, 6 and 7, the magnetic head mechanism 23 includes an arm member 30, a base plate 31, a suspension 32 including a load beam 33 and a gimbal spring 34, a slider 35, , A magnetic head 36, a holding lever 37, and a coil portion 38. As shown in FIGS. 1 and 2, the magnetic head mechanism 23 is configured such that an arm member 30 having mechanical rigidity is rotatably supported by a support shaft 39.
The arm member 30 is provided with a coil portion 38 at one end thereof and a cantilever suspension 32 at the other end thereof via a base plate 31.

The suspension 32 comprises the load beam 33 and the gimbal spring 34 as described above, and supports the slider 35 so as to be elastically displaceable in the height direction in FIG. The load beam 33 is formed of a thin metal plate as a material and is formed to be gradually narrower toward the distal end, and one end is fixed to the base plate 31. In the load beam 33, a gimbal spring 34 is combined on the free end side, and a pivot 33a is formed on the bottom surface. Gimbal spring 34
One end is cantilevered by the load beam 33, and the tip is bent in a U-shape as shown in FIG. Gimbal spring 34
Although not shown, a notch is formed on the tip side, and the pivot 33a is made to penetrate through the notch.

The slider 35 is made of, for example, a synthetic resin or a ceramic material having excellent wear resistance and has a substantially block shape. The slider 35 is mounted on the magnetic disk 3
A groove 35b in the rotation direction of the magnetic disk 3 is formed over the entire length on a surface (slider surface) 35a facing the slider. The slider 35 is freely movably supported by the pivot 33a abutting on the center thereof. A magnetic head 36 is attached to one side of the slider 35. The magnetic head 36 is connected to the read / write IC 40 with its lead wire 36a guided along the side end of the load beam 33 as shown in FIG.

The magnetic head mechanism 2 configured as described above
As will be described later in detail, 3 is normally held by the head holding mechanism 25 at a position retracted from the cartridge loading space 20a as shown in FIG. When the disk cartridge 1 is loaded in the cartridge loading space 20a and a recording operation or a reproducing operation is performed as described later, the magnetic head mechanism 23 is rotated by the head driving mechanism 24 into the cartridge loading space 20a. Is done. The magnetic head mechanism 23 enters the inside of the disk cartridge 1 through the recording / reproducing opening 4 and will be described in detail later.
As shown in FIG. 9, the slider 35 is pressed against the main surface 3a of the magnetic disk 3 with a predetermined pressing force by the elastic force of the suspension 32.

When the magnetic disk 3 is rotationally driven at a predetermined rotational speed by the disk rotation driving mechanism 22, the magnetic head mechanism 23 is generated between the main surface 3a of the magnetic disk 3 and the slider surface 35a of the slider 35. A levitation force is applied by the air flow. The magnetic head mechanism 23 causes the slider 35 to float at a predetermined interval with respect to the main surface 3a of the magnetic disk 3 against the elastic force of the suspension 32 by the flying force. The magnetic head mechanism 23 keeps the flying state, and the data recording area 10 of the magnetic disk 3
The data information signal and the servo information signal recorded on the data recording track 11 are reproduced, or the data information signal is recorded on the data recording track 11.

Although not described in detail, the head driving mechanism 24 is constituted by a voice coil motor, and drives the coil section 38 of the magnetic head mechanism 23. Head drive mechanism 2
When the magnetic disk 3 is rotationally driven at a constant rotation speed by the disk rotation drive mechanism 22, the magnetic disk drive 4 rotates the magnetic head mechanism 23 held by the disk holding mechanism 25 with the support shaft 39 as a fulcrum. Magnetic head mechanism 23
Is rotated into the cartridge loading space 20a as described above, enters the disk cartridge 1 through the recording / reproducing opening 4, and applies a predetermined pressing force to the main surface 3a of the magnetic disk 3. Therefore, it is pressed.

As shown in FIGS. 2 and 3, the disk holding mechanism 25 is provided at a side of the cartridge loading space 20a. The disk holding mechanism 25 is composed of a ramp 41 having an overall arc shape and having an inclined guide surface 41a formed at the tip. Disk holding mechanism 25
As shown in FIG. 8, when the holding lever 37 rides on the ramp 41, the slider 35 is held in a state separated from the main surface 3a of the magnetic disk 3. When the magnetic head mechanism 23 is rotated by the head drive mechanism 24, the disk holding mechanism 25 moves the holding lever 37 as shown in FIG.
Slides down from the ramp 41 to bring the slider 35 into pressure contact with the main surface 3 a of the magnetic disk 3.

When the magnetic head mechanism 23 is returned and rotated by the head driving mechanism 24 after the recording operation or the reproducing operation is completed, the disk holding mechanism 25 moves the holding lever 37 along the inclined guide surface 41a to the upper surface of the ramp 41. As a result, the slider 35 is maintained in a state separated from the main surface 3a of the magnetic disk 3.

In the magnetic head mechanism 23 described above, the slider 35 is divided into a positive pressure slider 35A and a negative pressure slider 35B due to its characteristics. The positive pressure slider 35A has a slider surface 35A as shown in FIG.
a, a groove 35b parallel to the rotation direction of the magnetic disk 3;
Are formed over the entire length. Positive pressure slider 35A
As shown in FIG. 11, the flying height h gradually increases as the rotation speed v of the magnetic disk 3 increases.
The positive pressure slider 35A is designed by appropriately designing the rotation speed of the magnetic disk 3 or its shape specification, the load load of the suspension 32, and the like, as shown in FIG. Is used in a range in which the change in the flying height h with respect to the change in the peripheral speed is stable.

On the other hand, in the negative pressure slider 35B, as shown in FIG. 12, a groove 35b is formed in the slider surface 35a as a concave portion that is not opened in the rotation direction of the magnetic disk 3, and a negative pressure is generated in the groove 35b. You. As shown in FIG. 13, the negative pressure slider 35B gradually increases the negative pressure component and the positive pressure component as the rotation speed v of the magnetic disk 3 increases, and cancels the increase in the positive pressure component, thereby increasing the flying height. The dependency of h on the peripheral speed is reduced. The negative pressure slider 35B can be given a peripheral speed dependency by designing it in consideration of the balance between the negative pressure component and the positive pressure component, and is used in the usage range shown in FIG.

The flying height of the magnetic head mechanism 23 changes depending on the state of the main surface 3a of the magnetic disk 3. That is,
When the first magnetic disk 3A is loaded, the magnetic head mechanism 23 controls the guard band 12, the fine convex portions 14a and the concave portions 14 of the data recording area 10 formed on the main surface 3a.
Under the influence of b, the load capacity of the air film between the main surface 3a and the slider 35 varies. The magnetic head mechanism 23 is shown in FIG.
As shown in FIG. 4, when the slider 35 has a groove parallel to the longitudinal direction, the flying height h gradually decreases as the groove depth d increases. This phenomenon depends on the depth d of the groove and the principal surface 3
This is caused by a change in the average gap between the slider a and the slider 35, and when the depth d of the groove increases, the effective gap increases and the load capacity decreases.

FIG. 14 shows the data recording track 11
The first magnetic disk 3A has a track width of 3.6 μm, a guard band 12 having a groove width of 1.8 μm, and a length of 1.7 μm.
78 mm, the width is 1.464 mm, the thickness is 0.8 mm, and the rail width constituted by the groove 35b is 252 μm.
FIG. 7 is a diagram showing a change in the flying height h between the slider 35 and the slider 35 whose load applied by the suspension 32 is 3.0 g.

In the disk drive device 20, the rotational speed v of the magnetic disk 3 is reduced to the first magnetic disk 3A.
Head mechanism 2 with respect to the second magnetic disk 3B
3 is determined by the peripheral speed dependency of the slider 35. The slider 35 has a flying height h at a certain radial position with respect to the first magnetic disk 3A and the second magnetic disk 3B as shown in FIG. As is clear from the drawing, the flying height h of the slider 35 is the flying height hA for the first magnetic disk 3A and the flying height hB for the second magnetic disk 3B for a certain rotational speed nB. Becomes Therefore, the disk drive device 20
In order to raise the flying height h of the slider 35 on the magnetic disk 3A to the flying height hB of the slider 35 on the second magnetic disk 3B, the first magnetic disk 3A is configured to be rotationally driven at the rotation speed nA. .

As described above, the smaller the depth of the guard band 12 or the depth of the recess 14b formed on the first magnetic disk 3A, the greater the flying height hA of the slider 35 and the higher the second disk drive device 20 is. Approaching to the magnetic disk 3B. Therefore, the disk drive device 20 is provided with the guard band 12 and the concave portion 14.
By using the first magnetic disk 3A whose depth b is made shallow in the allowable range of the magnetic characteristics of the magnetic head mechanism 23, the first magnetic disk 3A is driven with a reduced rotation speed increase. It becomes possible. Thus, the power consumption of the disk drive device 20 is reduced.

For the first magnetic disk 3A, the recording density of information signals and the like is slightly reduced.
2 may be formed without forming the servo signal emboss in the servo signal recording area 13.

In the disk drive device 20, the first disk cartridge 1A having the first magnetic disk 3A and the second disk cartridge 1B having the second magnetic disk 3B are identified by the disk identifying section 26. . As shown in FIGS. 1 to 3, the disc identification unit 26 is arranged near the cartridge loading slot 21 corresponding to the specification identification unit 7 of the disc cartridge 1. The disk identification unit 26 detects the presence or absence of a detection hole provided in the specification identification unit 7 to identify whether the loaded disk cartridge 1 is the first disk cartridge 1A or the second magnetic disk 3B.

The disc identification section 26 is constituted by, for example, a switch provided with an arc tutor protruding on a path through which the specification identification section 7 of the disc cartridge 1 passes. When the first disk cartridge 1A having the detection hole is loaded from the cartridge loading opening 21, the disk identification unit 26 is held in the OFF state by the arcuator being relatively engaged with the detection hole. Also, the disc identification unit 2
6 is a second disk cartridge 1 having no detection hole.
When B is loaded from the cartridge loading port 21,
The arcuator is pressed and turned on. The disk identification unit 26 outputs detection signals of the first disk cartridge 1A and the second disk cartridge 1B to the control unit 2
7 is sent out.

The disk identification unit 26 is not limited to the above-described mechanical-electrical switch in which the arcuator switches to two positions. For example, the disc identification unit 45 shown in FIG. 16 is configured by an optical switch including a light emitting element 46 and a light receiving element 47. Disk identification unit 45
The detection light emitted from the light emitting element 46 is applied to the disc cartridge 1 loaded from the cartridge loading port 21, and the detection light is received by the light receiving element 47 so that the disc cartridge 1 is moved to the first disc cartridge. 1A or the second magnetic disk 3B is identified.

The disc discriminating section 45 detects that the first disc cartridge 1A having a detection hole is
When the light receiving element 47 is loaded from the position 1, the detection light emitted from the light emitting element 46 enters the detection hole and is not reflected, so that the light receiving element 47 is turned off. Further, when the second disk cartridge 1B having no detection hole is loaded from the cartridge loading slot 21, the detection light is reflected by the second disk cartridge 1B and is transmitted to the light receiving element 45b. The light receiving element 45b is turned on by receiving the light.

The disk identification section 26 may be constituted by a magnetic sensor on condition that the data recording area 10 is not magnetically affected. Further, the disk identification unit 26 may be configured to read information in a semiconductor memory built in the disk cartridge 1 to identify the first disk cartridge 1A or the second magnetic disk 3B.

The control unit 27 controls the rotation frequency by changing the frequency division ratio of the reference crystal oscillator based on the identification signal D of the disk cartridge 1 sent from the disk identification unit 26. The control unit 27 includes a high-speed rotation frequency dividing circuit 42, a low-speed rotation frequency dividing circuit 43, and a driver circuit 44, as shown in FIG. When the first disk cartridge 1A is loaded into the control unit 27, an identification signal DA is output from the disk identification unit 26 to the high-speed rotation frequency dividing circuit 42. When the second disk cartridge 1B is loaded into the control unit 27, an identification signal DB is output from the disk identification unit 26 to the frequency dividing circuit 43 for low-speed rotation.

In the disk driver device 20, the frequency dividing ratio set in advance according to the first disk cartridge 1A or the second disk cartridge 1B is selected by the frequency dividing circuit 42 for high-speed rotation or the frequency dividing circuit 43 for low-speed rotation. As a result, the driver circuit 44 is driven. Driver circuit 44
Drives the spindle motor 28 at a predetermined number of rotations according to the first disk cartridge 1A or the second disk cartridge 1B.

Of course, the control unit 27 is not limited to the configuration in which the rotation of the spindle motor 28 is controlled by changing the frequency division ratio described above. The control unit 27 includes, for example, a crystal oscillator having a different frequency and one frequency dividing circuit, and employs an appropriate control method such as controlling the rotation of the spindle motor 28.

In the disk drive device 20 configured as described above, the disk cartridge 1 is loaded from the cartridge loading port 21 into the cartridge loading space 20a. In the disk drive device 20, the disk identification unit 26 identifies whether the loaded disk cartridge 1 is the first disk cartridge 1A or the second disk cartridge 1B. The disk drive device 20 positions and holds the magnetic disk 1 by the disk table 29 of the disk rotation drive mechanism 22.

When the disk drive device 20 identifies the first disk cartridge 1A, the disk identification unit 26
Sends the identification signal DA to the high-speed rotation frequency dividing circuit 42 of the control unit 27. The disk drive device 20
When the second disk cartridge 1B is identified, an identification signal DB is transmitted from the disk identification unit 26 to the low-speed rotation frequency dividing circuit 43 of the control unit 27.

When a recording operation or a reproducing operation is performed, the disk drive 20
The magnetic disk 1 is driven to rotate. When the magnetic disk 1 reaches a predetermined rotation speed, the disk drive device 20 causes the head driving mechanism 24 to operate the head holding mechanism 2.
The magnetic head mechanism 23 held at 5 is rotated to enter the disk cartridge 1 from the recording / reproducing opening 4.

When the loaded disk cartridge 1 is the first disk cartridge 1A, the driver circuit 44 is driven based on the high-speed rotation frequency dividing circuit 42 to drive the first magnetic disk. 3
A is driven to rotate at high speed. When the loaded disk cartridge 1 is the second disk cartridge 1B, the driver circuit 44 is driven based on the frequency dividing circuit 43 for low-speed rotation, and the disk drive device 20 drives the second magnetic disk 3B. Is rotated at a low speed.

The disk drive device 20 uses the airflow generated between the main surface 3 a and the slider 35 of the magnetic head mechanism 23 with the rotation of the magnetic disk 3 so that the slider 35
The levitation force is applied to The disk drive device 20
The slider 35 balances the elastic force of the suspension 32 and maintains a predetermined flying height. The disk drive device 20 reproduces an information signal or the like recorded on the magnetic disk 3 by the magnetic head 36 or records the information signal or the like.

The disk drive device 20 reproduces, using the magnetic head 36, information signals or the like recorded on the data recording tracks 11 divided by the guard band 12 of the data recording area 10 for the first disk cartridge 1 A, or An information signal or the like is recorded on the recording track 11. The disk drive device 20 includes a magnetic head 36
The seek operation or the tracking operation is controlled based on the servo signal recorded in the servo signal recording area 13 detected by the above.

As described above, the disk drive device 20 drives the first magnetic disk 3A by the disk rotation drive mechanism 22 for the first disk cartridge 1A.
Is driven at a high speed, the magnetic head mechanism 23
Thus, a larger levitation force is applied. Thus, the disk drive device 20 can use the magnetic head mechanism 2
The third slider 35 is held at a flying height equal to that of the second magnetic disk 3B, thereby avoiding the occurrence of a contact state between the slider 35 and the first magnetic disk 3A. Therefore, in the disk drive device 20, the first disk cartridge 1A and the second disk cartridge 1b can be used interchangeably, and the durability of the slider 35, the magnetic head 36, and the magnetic disk 3 is maintained, and the disk drive device 20 is driven by a head crash. High-precision recording and reproduction are performed while preventing damage to valuable information signals and the like.

[0059]

As described above in detail, according to the disk drive of the present invention, the first magnetic disk is driven to rotate at a high speed, so that the servo signal of the unevenness formed on the main surface of the first magnetic disk is rotated. The magnetic head mechanism, which is affected by the flying height due to the recording area, etc., has an increased flying force and records and / or reproduces information signals and the like with a flying height equivalent to that of the second magnetic disk. With such a configuration, the first magnetic disk and the second magnetic disk can be used interchangeably, and recording and / or reproduction of information signals and the like on these magnetic disks can be performed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a disk drive system including a disk drive device according to the present invention.

FIG. 2 is a horizontal sectional view of a main part of a disk drive device and a disk cartridge constituting the disk drive system.

FIG. 3 is a longitudinal sectional view of a main part of a disk drive device and a disk cartridge constituting the disk drive system.

FIG. 4 is a plan view of a high-density recording magnetic disk.

FIG. 5 is a schematic diagram of a main part illustrating a configuration of a signal recording unit of the high-density recording magnetic disk.

FIG. 6 is a perspective view from the bottom side of a floating magnetic head device provided in the disk drive device.

FIG. 7 is a schematic diagram illustrating a state during recording and reproduction of the flying magnetic head device.

FIG. 8 is an explanatory diagram of an unloaded state of the flying magnetic head device.

FIG. 9 is an explanatory diagram of a loading state of the flying magnetic head device.

FIG. 10 is a plan view of a positive pressure slider provided in the flying magnetic head device.

FIG. 11 is an explanatory diagram of flying characteristics of the same positive pressure slider.

FIG. 12 is a plan view of a negative pressure slider provided in the flying magnetic head device.

FIG. 13 is an explanatory diagram of flying characteristics of the negative pressure slider.

FIG. 14 is a diagram showing a relationship between a groove depth and a flying height of a high-density recording magnetic disk in a flying magnetic head device.

FIG. 15 is an explanatory diagram of flying characteristics of a high-density recording magnetic disk and a low-density recording magnetic disk in the flying magnetic head device.

FIG. 16 is a diagram illustrating another disk identification unit.

[Explanation of symbols]

1 disk cartridge, 1A first disk cartridge (disk cartridge for high density recording), 1B
2nd disk cartridge (low density recording disk cartridge), 3 magnetic disks, 3A 1st magnetic disk (high density recording magnetic disk), 3B 2nd magnetic disk (low density recording magnetic disk), 7 specifications Identification section, 10 data recording area, 11 data recording track, 12 guard band, 13 servo signal recording area, 14 servo signal recording section, 14a convex section, 14b
Recess, 20 disk drive device, 21 cartridge loading port, 22 disk rotation drive mechanism, 23 magnetic head mechanism, 24 head drive mechanism, 25 head holding mechanism, 26 disk identification section, 27 control section, 28 spindle motor, 32 suspension, 35 Slider, 36 magnetic head, 42 high-speed rotation frequency dividing circuit, 4
3 Low-speed rotation frequency divider, 44 driver circuit

Claims (6)

[Claims] 1. A disk drive device for recording and / or reproducing information signals and the like by a magnetic head mechanism having a flying characteristic with respect to a magnetic disk driven by a rotary drive mechanism, wherein a servo signal recording unit having irregularities is provided. By being formed, the first magnetic disk whose main surface is formed with a fine uneven surface and the second magnetic disk whose main surface is formed as a substantially flat surface can be used interchangeably. The magnetic head mechanism is configured such that the first magnetic disk is rotationally driven at a high speed with respect to the second magnetic disk by the rotary drive mechanism, so that the first magnetic disk and the second magnetic disk are rotated. A disk drive device for recording and / or reproducing information signals and the like with substantially the same flying height. 2. The rotation drive mechanism according to claim 1, wherein the switching control of the number of revolutions is performed based on a detection output of a disc identification means for discriminating between the first magnetic disk and the second magnetic disk. The disk drive device according to claim 1. 3. The magnetic disk according to claim 1, wherein the first magnetic disk is formed with a servo signal recording portion having irregularities and a data signal recording portion divided by a guard band formed of a groove having a constant depth. 2. The disk drive device according to claim 1, wherein: 4. The disk drive device according to claim 1, wherein said first magnetic disk and said second magnetic disk are respectively rotatably housed in a cartridge body to constitute a disk cartridge. . 5. A first magnetic disk in which a main surface is formed with a fine uneven surface by forming a servo signal recording portion or the like having unevenness, and a main surface is formed as a substantially flat surface. The magnetic disk drive can be used interchangeably with the second magnetic disk. The loaded magnetic disk is driven by a rotary drive mechanism, and information signals and the like are transmitted by a magnetic head mechanism having flying characteristics with respect to the magnetic disk driven by rotation. When the recording and / or reproduction is performed and the first magnetic disk is loaded, the first magnetic disk is rotationally driven at a high speed with respect to the second magnetic disk by the rotational drive mechanism, Recording and / or reproduction of information signals and the like is performed by making the flying height of the magnetic head mechanism with respect to the first magnetic disk substantially equal to the flying height with respect to the second magnetic disk. A disk drive control method characterized in that: 6. A magnetic disk loaded by disk identification means for identifying whether the magnetic disk is the first magnetic disk or the second magnetic disk, and based on the mounted identification of the first magnetic disk, the rotational drive. 6. The disk drive control method according to claim 5, wherein switching control of the output rotation speed of the mechanism is performed, and the first magnetic disk is driven to rotate at a high speed with respect to the second magnetic disk.