JPH05210909A - Disk device and duplicator device - Google Patents

Abstract

PURPOSE:To considerably increase the recording/reproducing speed and the dubbing speed by providing one motor servo circuit as well as plural recording and reproducing heads and related circuits and recording and reproducing respective signals on areas divided in the radial direction on a disk by respective heads independently of one another. CONSTITUTION:A disk motor servo circuit 17, recording and reproducing heads 2a to 2d, seek mechanisms for respective heads, and recording and reproduced signal processing circuits 7a to 7d and 8a to 8d are provided for one disk 1. Further, actuator servo circuits 6a to 6d and a system controller 10 which controls these circuits and the circuit 17 are provided, and heads 2a to 2d are divisionally arranged in areas A to D of the disk 1. At the time of recording as well as reproducing, heads independently and simultaneously record or reproduce signals on areas A to D of the disk 1 based on the control of the controller 10 by a head SW switching circuit 18 and changeover switches SW1 to SW4. Thus, the extent of movement of each head is reduced to 1/4, and data is recorded and reproduced at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device having a disk-shaped recording medium such as a magnetic disk device and a duplicator device to which the disk device is applied.

[0002]

2. Description of the Related Art In a magnetic disk device currently in practical use, as shown in FIG. 5, a seek mechanism 3 for seeking (moving) a head carriage holding a magnetic head 2.
Is one per spindle. In FIG. 5, reference numeral 1 is a magnetic disk (hereinafter also simply referred to as “disk”) which is a recording medium, 4 is a spindle motor (hereinafter simply referred to as “motor”), and 23 is a gimbal spring. In such a magnetic disk device, as shown in FIG. 6, when an access request is made, first, a magnetic head (hereinafter also simply referred to as “head”) 2 is moved to a target cylinder, and then,
Recording and reproduction are performed after the target sector comes to the position of the head 2 due to the rotation of the disk 1.

In the conventional magnetic disk device as shown in FIG. 5, the waiting time until the sector to be recorded or reproduced reaches the position of the head 2 is determined by the rotation cycle of the disk 1, and the rotation cycle is the maximum value. Become. Therefore, in order to shorten this waiting time, the rotation speed of the disc 1 must be increased. Further, since there is only one set of the seek mechanism 3, if two or more disk accesses are concentrated, it is necessary to wait for the second and subsequent disks and read and write one by one.

Therefore, a large number of head carriages and seek mechanisms are provided so that recording and reproducing can be performed in parallel by the respective magnetic heads 2 to shorten the rotation waiting time and to read / write different sectors on the disk in parallel. It is conceivable to increase the disk access throughput by performing the above. FIG. 7 shows an example of the configuration, in which three sets of head carriages and seek mechanisms 3 are provided, and the head 2 is provided for each carriage.
Are connected to recording / reproducing amplifiers, modulator / demodulator circuits, etc., which are not shown, so that data on the same disk 1 can be simultaneously read / written in parallel by three sets of head systems. In this way, it is possible to shorten the rotation waiting time and increase the access throughput.

[0005]

In the above-described magnetic disk device, which is a typical disk device of the related art, a large amount of data information is distributed corresponding to the number of heads, and each head can record and reproduce at the same time. It is preferable because it can correspond to high speed. However, when it is necessary to transmit input / output data information at a higher speed and record / reproduce at an extremely high speed, the conventional magnetic disk device may seek from the outermost circumference to the innermost circumference to some extent. However, there is a problem that the above speedup cannot be supported.

[0006]

DISCLOSURE OF THE INVENTION A disk device according to the present invention includes a motor servo circuit, a signal recording / reproducing head, a head seek mechanism, a recording signal processing circuit, and a reproduction signal processing circuit for one disk. , A plurality of seek control circuits for the seek mechanism, further comprising a seek control circuit and a system controller for supplying a control signal to the motor servo circuit, and the plurality of heads are arranged by dividing the upper area in the radial direction of the disk. Then, each head is configured to independently record and reproduce signals in an individual annular area.

Further, the duplicator device is provided with two or more such disc devices, one of which is a reproducing side and the other is a recording side, and the reproducing side and the recording side are electrically connected via a reproducing / recording signal processing circuit. The above problem was solved by connecting all the seek control circuits and the motor servo circuits with one system controller, and further speeding up the dubbing and recording / playback of a large amount of data was achieved. ..

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the disk device of the present invention will be described with reference to FIG. FIG. 1 is a schematic block diagram of the device 11 of the first embodiment of the present invention.
6d is an actuator servo circuit, 7a to 7d are recording signal processing circuits, 8a to 8d are reproduction signal processing circuits, 10 is a system controller, 11 to 13 are magnetic disk devices,
Reference numeral 15 is a signal distribution circuit, 16 is a signal selection circuit, 17 is a disk motor servo circuit, 18 is a head Sw switching circuit, Sw
1 to Sw4 are changeover switches.

A plurality of (for example, four) heads 2a to 2d for recording and reproducing information signals are arranged on the disk 1 at positions where they do not collide with each other. Each head 2a-2d
Each has a seek mechanism (actuator; not shown) that operates individually, and each head is independently slidable in the radial direction and is driven by a stepping motor or the like.

The greatest feature of the device 11 of the present invention, that is, the greatest difference from the prior art shown in FIG.
That is, d is arranged in the radial direction of the disk 1 by dividing the area, and each of the heads 2a to 2d is in charge of an individual area (recording area). That is, on the radial direction of the disc 1, four annular regions A are formed from the inner side to the outer side of the disk.
To D, and the heads 2 are respectively provided in the annular areas A, B, C, and D.
a, 2b, 2c, 2d are arranged, and each head is configured to independently record and reproduce signals in each area.

Disk rotation control and head movement control are
A system controller (hereinafter sometimes abbreviated as "syscon") 10 is controlled by a disk motor control (servo) circuit 17 and actuator servo circuits (seek control circuits) 6a to 6d, respectively. As a result, the heads 2a to 2d are controlled to move within the annular regions A to D, respectively, and the recording or reproducing operation is performed.

Next, the signal system will be described. First, when recording, when the user presses the recording operation button (not shown),
A head Sw (switch) changeover circuit 18 connects all the changeover switches Sw1 to Sw4 to the terminal r side by a control signal from the system controller 10. The signal from the input terminal In is divided into four (serial-to-parallel conversion) by the signal distribution circuit 15, and then the recording signal processing circuits (including the modulation circuit) 7a to 7 respectively.
It is supplied to d and undergoes predetermined signal processing there. Further, the respective areas A to D on the disk 1 are supplied to arbitrary heads 2a to 2d via respective changeover switches Sw1 to Sw4.
Will be recorded at the same time.

Further, at the time of reproduction, the head Sw switching circuit 18
Changeover switch Sw1 ~
Sw4 is connected to the terminal r side. After that, each head 2a
2d scans the respective areas A to D and reproduces already recorded signals substantially at the same time. Each reproduction signal is reproduced through a switch Sw1 to Sw4, and a reproduction signal processing circuit (including a demodulation circuit) 8a to 8d.
Is subjected to a predetermined reproduction process, is then returned to the original signal by the signal selection circuit 16 (parallel-serial conversion), and is output from the output terminal Out.

As described above, in the apparatus of the present invention, since the heads 2a to 2d assigned to the annular areas A to D respectively record and reproduce at substantially the same time, the moving amounts of the heads 2a to 2d are small (conventional). About 1/4 of the number of heads}
Therefore, data information can be recorded and reproduced at high speed.

Next, a second embodiment of the disk device of the present invention will be described with reference to FIG. FIG. 2 is a block diagram of a second embodiment device 12 of the present invention. In this figure, the same components as those of the first embodiment device 11 shown in FIG. Omit it. In the device 12 of the second embodiment, as shown in FIG.
Independent input / output terminals In1 to In4 and Ou corresponding to a to 2d
Each of t1 to Out4 is provided so that a maximum of four different signals can be recorded and reproduced. Therefore, the signal distribution circuit 15 and the signal selection circuit 16 in the apparatus 11 of the first embodiment do not exist, and a plurality of information signals can be recorded or reproduced simultaneously or arbitrarily.

Next, a disk device according to a third embodiment of the present invention will be described with reference to the block diagram of FIG. Note that, also in this drawing, the first and the first shown in FIGS.
The same components as those of the devices 11 and 12 of the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In the device 13 of the third embodiment, as shown in FIG.
Tuners 5a to 5d are connected to In4, and a program of an arbitrary channel set in each tuner can be freely recorded and reproduced in each annular area A to D by each head 2a to 2d. ing.

When reproducing, each head 2a ...
If only a desired one of 2d is selectively sought, or only one of the signals reproduced simultaneously by all the heads 2a to 2d is selected by the signal selection circuit 16 and output. good.

As a concrete example of use, at home, for example, a couple and a child each individually select a channel for each tuner, and each has a use area for its own use.
When each person wants to watch, it is possible to freely select a program recorded in his / her own recording area (other person's recording area is also acceptable), connect a monitor TV to the output terminal Out, and watch the program.

Finally, a fourth embodiment device 14 shown in FIG.
Is configured as a duplicator device (copying machine). That is, as shown in the figure, two disk devices are used,
One is a master (playback) side and the other is a slave (recording) side, both of which are electrically connected by the playback / recording signal processing circuits 9a to 9d and controlled by one system controller 10. Also in this figure,
The same components as those of the first to third embodiment devices 11 to 13 shown in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.

As is well known, the duplicator is a duplication device that reads data from an arbitrary storage location of a storage medium and writes the data in another storage location in the same physical form as a prototype. Therefore, each head 2a on the master side 14a
2d and each annular area A to D of the disk 1 and the slave side
The heads 2a to 2d and the annular regions of 14b correspond to each other.

In this structure, the heads 2a to 2d on the master side 14a reproduce signals from the disk 1a, and the reproduction / recording signal processing circuits 9a to 9d perform predetermined signal processing, and then the heads on the slave side 14b. Since the data is recorded on the disc 1b with 2a to 2d, a quick dubbing operation can be simultaneously performed in each of the annular areas A to D, whereby the time required for dubbing can be significantly shortened. In addition,
The configuration of the slave side 14b is not limited to one disk device, but may be provided with a plurality of disk devices.

As described above, the apparatus of the present invention divides the recording area of one disk into a plurality of annular areas. In the above embodiment, the number of annular areas, heads and seek mechanisms is four. However, 5 or more is acceptable,
Alternatively, even if the number of heads is two or three, if each head is configured so as to divide the disk into respective annular areas,
This satisfies the concept of the device of the present invention.

In the description of the prior art, the disk 1 is a magnetic disk and the head is a magnetic head, but the disk is an optical disk or a magneto-optical disk.
An optical pickup or the like may be provided instead of the magnetic head. When a hard disk is used as the magnetic disk, it is convenient to set the start and stop contact areas (areas) at the boundary between the annular areas A to D.

[0024]

Since the disk device of the present invention is constructed as described above, it is possible to realize a higher speed in recording and reproducing large-capacity data information. It has an excellent feature that it can realize higher speed dubbing of data information.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a first embodiment of a disk device of the present invention.

FIG. 2 is a block configuration diagram showing a second embodiment of the disk device of the present invention.

FIG. 3 is a block configuration diagram showing a third embodiment of the disk device of the present invention.

FIG. 4 is a block configuration diagram showing an embodiment in which the device of the present invention is configured as a duplicator.

FIG. 5 is a side view of a main part of a conventional magnetic disk device.

FIG. 6 is a diagram for explaining access time of a magnetic disk.

FIG. 7 is a plan view of another conventional example of a magnetic disk device.

[Explanation of symbols]

 1, 1a, 1b disk 2, 2a-2d magnetic head 3 seek mechanism 4 spindle motor 5a-5d tuner 6a-6d actuator servo circuit 7a-7d recording signal processing circuit 8a-8d reproduction signal processing circuit 9a-9d reproduction / recording signal Processing circuit 10 System controller 11 to 13 Magnetic disk device 14 Duplicator device 15 Signal distribution circuit 16 Signal selection circuit 17 Disk motor servo circuit 18 Head Sw switching circuit A to D Annular area Sw1 to Sw4 changeover switch

Claims (2)

[Claims] 1. A plurality of heads for one disk,
A plurality of seek mechanisms for seeking each head, a plurality of recording signal processing circuits and reproducing signal processing circuits for respectively recording and reproducing each signal for each head, operation of each seek mechanism and rotation of a disk motor A plurality of seek control circuits and a motor servo circuit for controlling each, and a system controller for supplying a control signal to the seek control circuit and the motor servo circuit are provided, and the heads are provided at different positions in the radial direction of the disk. A disk device characterized in that the heads are divided and arranged so that each head independently records and reproduces a signal in an individual annular area. 2. A disk device according to claim 1, wherein two or more disk devices are provided, one of which is a reproducing side and the other is a recording side, and the reproducing side and the recording side are electrically connected via a reproducing / recording signal processing circuit. A duplicator device characterized in that, while being connected, all seek control circuits and motor servo circuits are configured to be controlled by one system controller.