JPH03225681A - disk device - Google Patents

Abstract

PURPOSE:To highly speed up the write and read of information by performing the write and read of the information on plural recording media with one control means and moving a head to a desired track with the other control means. CONSTITUTION:Which disk of plural magnetic disks 1a and 1b should be recorded with information or read out its information is decided in selecting a magnetic head 3a or 3b by magnetic head circuits 4a and 4b. Then, actuators 5a and 5b are fixed with the heads 3a and 3b, and are to be moved by their actuator motors 6a and 6b, so that the heads 3a and 3b are operated to seek in the radial direction of the disks 1a and 1b respectively. Now, the heads 3a and 3b and the actuators 5a and 5b are controlled to be operated alternately. Then the head 3a or 3b can be operated to seek and to be positioned so that one is recording or reading the information while the other is ready for record ing and reproducing the next information. By this method, when one is over, the other immediately becomes accessible, thereby performing the operation at high speed.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a disk device (optical disk device, magnetic disk device) used as an auxiliary storage device in various computer systems, computers, workstations, etc. .

[Conventional technology]

FIG. 4 is a schematic side sectional view of the mechanical components of a conventional disk device and a block diagram showing the configuration of a control system. The configuration shown in FIG. 4 is shown in "Silicon Systems Products Rotary Memory Device Comprehensive Catalog" published by Inter-X, March 1986.

In FIG. 4, reference numeral 1 indicates a magnetic disk 2, a spindle motor, 3 a magnetic head, 4 a b1 head rotation,
5 is an actuator for the magnetic heel 1-3, and 6 is an actuator motor for operating the actuator 5.

In this example, three magnetic disks 1 are provided and are fixed to the rotating shaft of a spindle motor 2 at predetermined intervals in the direction of the rotating shaft. Therefore, when the spindle motor 2 is rotationally driven, the three magnetic disks 1 are rotated. Each magnetic disk 1 has a circumferential track centered around the center of rotation, and an index is provided at the starting point of each track. Note that a magnetic head 3 is provided for each magnetic disk l (that is, three magnetic heads 3 are provided in this example), and each magnetic head 3
The relative position with respect to each magnetic disk 1 is called an address.

As described above, three magnetic heads 3 are provided for recording information on the surface of each magnetic disk 1 and for reading information, and are fixed to the actuator 5. The magnetic head circuit 4 selects one of the magnetic heads 3 to record information on and read information from among the three magnetic disks 1 (the selected head is called a head address). The information signal read from the magnetic disk 1 by the magnetic head 3 is also amplified. Three magnetic nodes 3 are fixed to the actuator 5. As the actuator 5 is driven and moved by the actuator motor 6, the magnetic node 3 is sought in the radial direction of the magnetic disk l.

Therefore, the track on which information is actually recorded or the track from which information is read is determined to be one of the three magnetic disks 1 based on the cylinder address and head address.

In addition, the tracks of the magnetic disk 1 are provided with the above-mentioned index at the starting point, and servo information indicating position information such as the cylinder address of the track is recorded in advance, and the blank areas of these tracks are Original data is recorded.

Above magnetic disk 1. Spindle motor 2° magnetic head 3. Magnetic head circuit 4. The actuator 5 and the actuator motor 6 are hermetically housed in an enclosure 7.

8 is a spindle motor controller, 9 is a servo body modulator, 10 is a servo controller, 11 is a servo driver, 12 is a pulse detector, I3 is a data recovery, 14 is a storage controller, and 16 is an ink face.

The spindle motor controller 8 is the spindle motor 2
The spindle motor 2 is driven to rotate by generating a signal to control the rotation of the spindle motor 2. The servo body modulator 9 converts the servo signal read from the magnetic disk 1 by the magnetic head 3 and amplified by the magnetic head circuit 4 into a position signal (signal representing a cylinder address). The servo controller 10 generates a signal for controlling the actuator 5 in accordance with the signal converted by the servo body modulator 9. The servo driver 11 amplifies the signal generated by the servo controller IO and supplies it to the actuator motor 6. As a result, the actuator motor 6 operates the actuator 5 to cause the magnetic head 3 to seek. The pulse detector 12 is connected to the magnetic head circuit 4 when the magnetic head 3 reads from the magnetic disk 1.
converts the amplified analog signal into a digital signal.

Data recovery 13: Generates a lock necessary to demodulate the single digital signal obtained by the pulse detector 12 into an NRZ (non-return to zero) signal. The storage controller 14 not only modulates the signal to be recorded on the magnetic disk l into a suitable signal, but also modulates the digital signal obtained by the pulse detector 12 into Nl? Demodulates to Z signal. The ink face 16 controls servo circuits (servo body modulator 9, servo controller 10, servo driver 11, etc.) according to instructions given from a host computer (not shown), and also controls information to be recorded on the magnetic disk 1 or from the magnetic disk 1. The read information is exchanged with the host computer.

Note that the above spindle motor controller 8° servo body modulator 9. Servo controller 10, servo driver 11. Pulse detector 12. Data recovery 13. Storage controller 14. interface 1
6 is controlled by a microprocessor 17.

The basic operation of such a conventional disk device is as follows.

A spindle motor 2 driven by a spindle motor controller 8 according to a control signal output from a microprocessor 17 rotates a magnetic disk 1 at a constant speed.

The servo information recorded on the track of the magnetic disk l where the magnetic head 3 is located is read by the magnetic head 3,
The signal is amplified by the magnetic head circuit 4 and converted into a position signal by the servo body modulator 9.

Based on this position signal, servo controller 10 controls servo driver 11 in accordance with a control signal output from microprocessor 17. As a result, the actuator motor 6 is driven and the actuator 5 is moved.
Seeking and positioning of the magnetic field 3 is performed.

When recording information on the magnetic disk 1, the information is given from the host computer to the storage controller 14 via the ink face 16, where it is converted into a code suitable for recording on the magnetic disk 1, and sent to the magnetic node circuit. given to 4. The magnetic head circuit 4 records the information on the magnetic disk 1 by driving the magnetic head 3 according to the signal given from the storage controller 12.

On the other hand, when reproducing information recorded on the magnetic disk 1, the information is read from the magnetic disk 1 by the magnetic head 3, amplified by the magnetic head circuit 4, and then converted into a digital signal by the pulse detector 12. This digital signal is separated into a data signal and a black signal by a data recovery device, and then sent to the storage controller 14.
The data is demodulated to the original NRZ data and sent to the host computer via the ink face 16.

[Problem to be solved by the invention]

By the way, since the conventional disk "AH" performs the basic operations as described above, as shown in FIG. Repeat alternately.

That is, as shown in FIG. 5 (al), information (11) for one track is first read from the index indicating the starting point of the track on the magnetic disk 1, and the data is sent to the interface 16. The magnetic head 3 moves to the track where the information (I2) to be read next is recorded.
After the index is sought (at this time, if the time required for the magnetic head 3 to seek to the target track position is shorter than the time required for one rotation of the magnetic disk 1, the index reaches the position of the magnetic head 3. The information (I2) is read out and sent to the ink face 16. This love 11a (1
1) and (I2) are read by the magnetic head 3, time required for a seek operation to move the magnetic head 3 between both tracks is required. Therefore, the time actually required to read one track of information recorded on the magnetic disk 1 is the time required to seek the magnetic head 3 to the position of the track where the target information is recorded. This is the sum of the time required to actually read the information after that. This applies not only to reading information but also to recording information.

In addition, FIG. 5 (bl) shows a situation in which seeking by the magnetic head 3 takes a relatively long time, specifically, more time than the time required for one rotation of the magnetic disk 1. In this case, takes more time to access.

The present invention was made in view of these circumstances, and
An object of the present invention is to provide a disk device that can read information recorded on a recording medium such as a magnetic disk at a higher speed, and can also record information on a recording medium at a higher speed.

[Means to solve the problem]

The disk device of the present invention includes two sets of recording media configured to individually record information on the recording media and to read information individually from the recording media, a magnetic head, structural parts such as a means for moving the 7F, and the like. The control means that controls the entire system reads information from one recording medium, and while information is being recorded on the other recording medium, the magnetic head is activated in preparation for recording or reading the next information. Control to perform soaking and positioning.

[Effect]

In the disk device of the present invention, 2) the Jl recording medium and its control means operate alternately, and while information is being read from and recorded on one recording medium, the other recording medium is reading the next information. Seeking and positioning of the magnetic head are performed in preparation for recording or reading, so as soon as information is read from one recording medium and information is recorded on the magnetic disk, information is read from the other recording medium and read from the other recording medium. Information can be recorded to.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof.

FIG. 1 is a schematic side sectional view of the mechanical components showing the structure of the disk device of the present invention, and a block diagram showing the structure of the control system.

In FIG. 1, reference numbers 1a and lb are first and second magnetic disks, respectively, 2a and 2b are first and second magnetic disks, and 2a and 2b are first and second magnetic disks.
3a and 3b are first and second magnetic heads; 4a and 4b are first and second magnetic head circuits; 5a and 5b are first and second magnetic heads, respectively; The first and second actuators 6a and 6b of the first magnetic heads 3a and 3b are first and second actuator motors that operate the first and second actuators 5a and 5b, respectively.

In this embodiment, the remagnetic disks la and lb are each 3
The first and second spindle motors 2a, 2 are provided as a set and are spaced at predetermined intervals in the direction of the rotating shaft.
It is fixed to the rotating shaft of b. Therefore, when the first and second spindle motors 2a and 2b are rotationally driven, the three first and second magnetic disks la and lb are rotated, respectively. Each magnetic disk has a circumferential track centered around the center of rotation, and an index is provided at the starting point of each track. Note that each magnetic disk Ia.

Magnetic heads 3a and 3b are provided for each magnetic head 1b (that is, in this example, there are two magnetic heads in a set of three).
The relative position of each magnetic head 3a, 3b with respect to the magnetic disks la, Ib is called a cylinder address.

To magnetic, 7 dos 3a, 3b are magnetic disks la, lb
In order to record information on each surface and read out information, a set of three actuators (2 kI) are provided as described above, and are fixed to the first and second actuators 5a and 5b, respectively.

The first and second magnetic head circuits 4a and 4b each control one of the magnetic heads 3a and 3b to determine which of the three magnetic disks la and lb to record information on and read information from. (The selected head is called a head address), and the magnetic heads 3a and 3b address the magnetic disks la and Ib.
amplify the information signal read from the

As described above, three magnetic heads 3a and 3b are fixed to the first and second actuators 5a and 5b, respectively. and first and second actuators 5a,
5b is driven and moved by the first and second unit motors a and 6b, respectively, thereby causing the magnetic heads 3a and 3b to seek in the radial direction of the magnetic disks la and lb, respectively.

Therefore, the track on which information is actually recorded or the track on which information is read is determined to be one of the six magnetic disks la and lb based on the cylinder address and head address.

In addition, the tracks of magnetic disks LA and LB are provided with the aforementioned index at their starting point, and servo information representing position information such as the cylinder address of the track is formed in advance, and the margins of these tracks are The original data is recorded in that section.

The above first and second magnetic disks Ia, lb, spindle motors 2a, 2b, magnetic heads 3a, 3b,
magnetic head circuits 4a, 4b, actuator 5a,
5b and actuator motors 6a, 6b are hermetically housed in enclosures 7a, 7b, respectively.

8a and 8b are first and second spindle motor controllers, respectively; 9a and 9b are first and second spindle motor controllers, respectively;
servo body modulators, 10a, 10b are first and second servo controllers, lla, ll, respectively;
12 is a pulse detector, 13 is a data recovery, 14 is a storage controller, 15 is a multiplexer, and 16 is an interface.

first and second spindle motor controllers 8a;
8b are first and second spindle motors 2a, respectively;
A signal is generated to control the rotation of spindle motor 2b, thereby driving the first and second spindle motors 2a and 2b to rotate.

The first and second servo body modulators 9a and 9b respectively correspond to the first and second magnetic heads 3a and 3b.
The second magnetic disk circuits 4a and 4b convert the amplified sabot (No. 3) into a position signal (a signal representing a cylinder address).

The first and second servo controllers lOa and 10b respectively include the first and second servo body modulators 9a and 10b.
9b generates a signal for controlling the first and second actuators 5a and 5b in accordance with the converted signal.

The first and second servo drivers lla and llb are the first and second servo controllers 10a and 10, respectively.
b amplifies the generated signal and supplies it to the first and second actuator motors 6a and 6b. As a result, the first and second actuator motors 6a and 6b operate the first and second actuators 5a and 5b, respectively, to cause the first and second magnetic heads 3a and 3b to seek.

The pulse detector 12 is connected to the first and second magnetic heads 3a.
, 3b are the first and second magnetic disks Ia, respectively.
reading from lb to the first and second magnetic circuits 4a,
4b converts the amplified analog signal into a digital signal.

The data recovery 13 generates a lock necessary for demodulating the digital signal obtained by the pulse detector 12 into an NRZ (non-return to zero) signal.

The storage controller 14 modulates the signals to be recorded on the first and second magnetic disks la and lb into appropriate signals, and also demodulates the digital signal obtained by the pulse detector 12 into an NRZ signal.

The ink face 16 controls servo circuits (first and second servo body modulators 9a, 9b, servo controllers 10a, lob, servo drivers 1la, 11b, etc.) according to commands given from a host computer that is not received orally. The information recorded on the magnetic disks la and lb or the information read from the magnetic disks la and lb is exchanged with the host computer.

Note that the first and second spindle motor controllers 8a and 8b, the first and second servo day modulators 9a and 9b, the first and second servo controllers 10a and 10b, and the first and second Servo driver ll
a llb, pulse detector 12. day recovery 1
Month 3. Storage controller 14. ink face 1
6 is controlled by a microprocessor 17.

Note that the multiplexer 15 selectively connects the pulse detector 12 to either the first magnetic head circuit 4a or the second magnetic head circuit 4b according to instructions from the storage controller 14.

The basic operation of the magnetic disk device of the present invention is as follows.

A spindle motor 2 driven by a spindle motor controller 8 rotates the magnetic disk 1 at a constant speed in accordance with a control signal output from a microprocessor 17.

The servo information recorded on the tracks of the first and second magnetic disks la and lb on which the first and second magnetic heads 3a and 3b are located, respectively, is stored in the first and second magnetic heads 3a and 3b, respectively. read, first and second
The signal is amplified by the magnetic head circuits 4a and 4b, and converted into a position signal by the first and second servo body modulators 9a+9b. Based on this position signal, the first and second servo controllers 10a and 10b respectively control the first
and a second servo driver 11a.

11b. As a result, the first and second actuator motors 6a, 6b are driven, and the first and second actuator motors 6a, 6b are driven.
actuators 5a and 5b move, and the first and second actuators 5a and 5b move.
Seeking and positioning of the magnetic heads 3a and 3b are performed.

When recording information on the first (or second) magnetic disk 1a (lb), the information is given from the host computer via the ink face 16 to the storage controller 14, where it is suitable for recording on the magnetic disk. Zl tA is given to the first (or second) magnetic circuit 4a (4b) by selection of the multiplexer 5.
4b) drives the first (or second) magnetic node 3a (3b) according to the signal given from the storage controller 12 via the multiplexer 15, thereby transmitting the information to the first (or second) magnetic node 3a (3b). Magnetic disk Ia (
1b).

On the other hand, if the information recorded on the first (or second) magnetic disk 1a (Ib) is not read, the first (or second)
The information is read from the first (or second) magnetic disk 1a (lb) by the magnetic head 3a (3b) of
After being amplified by the (or second) magnetic head circuit 4a (4b), it is applied from the multiplexer 15 to the pulse detector 12 and converted into a digital signal. This digital signal is separated into a data signal and a clock signal by the data recovery 13, and the storage controller 14
8P1 restored to original NRZ data, ink face 16
is sent to the host computer via

By the way, in the Deinuk device of the present invention, two yobed disks 1a (Ib), spindle motors 2a (2b),
Magnetic head circuit 4a (3b), magnetic head circuit 4a (
4b), an actuator 5a (5b), an actuator motor 6a (6b) and other mechanisms, and a spindle motor driver 8a (8b) for controlling them individually, a servo circuit control system, that is, a servo body module. controller 9a (9b), servo controller 1Oa (10b), servo driver l1a (ll
There are also two sets of b). Then, while one set (hereinafter referred to as the first system) with the reference number suffixed with a is recording and reading information on the first magnetic disk 1a, a suffix b is added with the reference numeral. One set (hereinafter referred to as the second system) performs a seek operation, and conversely, while the second system is recording and reading information to and from the second magnetic disk 1b, the second system performs a seek operation. The system is controlled by a microprocessor 17 for sorter operation.

FIG. 2 (al) shows the operating state when the rotations of both spindle motors 2a and 2b are synchronized by index and the seek time is shorter than the time tr required for one rotation of both magnetic disks Ia and lb.

That is, in the first system, the tiger of the first m-disk 1a,
First, information t8 (I
la) is read out and the data is sent to the ink face 14. During this time, in the second system, the second magnetic node 3b seeks the track in which the information to be read next (lTo) is recorded.

At this time, since both spindle motors 2aI2b are rotated in synchronization with the index, the time required for the shifting operation of the second system is the time t required for one revolution of the magnetic disk 1.
If it is shorter than r, the second system can read the target information (Ilb) from the second magnetic disk 1a in the next rotation. At this time, it may be necessary to wait for the index to rotate after the second magnetic head 3b seeks to the target track until the index rotates to the position of the second magnetic head 3b.

Information (Ilb) read from the second magnetic disk 1b
The information (ll) that cannot be extracted from the first magnetic disk 1a.
a) Then the data is sent to the interface 14-.

While the information (Ilb) is being read from the second magnetic disk lb in this second system, the track in which the information (I2a) to be read next is recorded is being read in the first system. A seek operation is performed.

Thereafter, information is sequentially and alternately read out in both systems, and the ink face 16 transmits and receives data without any idle time (time during which the ink face 16 does not transmit or receive data).

The above operation is the same not only when reading information but also when recording information.

In addition, as shown in FIG.
, 3b is relatively long, and in this case it takes more time to access than in the above case. However, in this case as well, information is read (or recorded) from the magnetic disks Ia, lb once within the total time of the seek time (including rotational waiting time) for each magnetic disk 1a, 1b. Therefore, the entire device can record (or read) information twice.

FIG. 3 shows the operating state when both spindle motors 2a, 2b are not synchronized.

In this case, the read/write circuit (pulse detector 12.
When the data recovery 13) completes the read operation of the information (Ila) signal from the first magnetic head circuit 4a, the second magnetic head circuit 4b completes the seek operation, and the information (Ila) signal is read out from the first magnetic head circuit 4a.
Although the read operation of i(rlb) can be started, since the index of the second magnetic disk lb cannot be detected, the state waits for rotation.

In this way, when both spindle motors 2a and 2b are not synchronized, a rotation waiting time is always required even if the seek is completed in a short time.

As is clear from FIG. 3, both spindle motors 2a,
When the ink face 2b is synchronized, the time to when the ink face 16 is in the idle state is to= [ts/ti] time).

On the other hand, when both spindle motors 2a and 2b are synchronized, the idle time t of the ink face 16.

is to−= [(ts/li) + l l Xt
Represented by i.

From these two equations, it can be seen that by synchronizing both spindle motors 2a and 2b, it is possible to write and read data to and from the magnetic disks la and lb in a shorter time.

It should be noted that the above embodiment may be applied to one enclosure 7, for example.
It is clear that the same effect can be obtained even if the magnetic disks 1a, 1b and the actuator motors 6a, 6b are each provided 2 m long.

Furthermore, in the above embodiment, both spindle motors 2a2b are synchronized with the indexes of the respective magnetic disks Ia and Ib, but if the indexes are synchronized with sector pulses indicating the positions of further divided sectors,
The time required to pull both spindle motors 2a, 2b into synchronization becomes shorter.

In addition, in the above embodiment, 5, 2, and 2 motors, 2 a 2 h
Control by t-spindle motor controller 8 1Tll
However, two sets of +a disks 1a1b
It is also possible to have a configuration in which the upper and lower ends of both rotations are matched and rotated by the same spindle motor.

Furthermore, although the above embodiment describes a disk device that uses a magnetic disk as the recording medium, it is of course possible to apply the present invention to a disk device that uses an optical disk as the recording medium.

〔Effect of the invention〕

As described in detail above, the disk device of the present invention includes two systems: a disk-shaped recording medium, a head for recording information on the medium, a head for reading information from the medium, and a means for controlling the head. Since the data is controlled individually, there is no need to make major changes to the basic configuration of conventional disk devices, and data transmission/reception pauses during seek operations can be eliminated.
Alternatively, since it becomes possible to shorten the length, high-speed access is realized, and even higher-speed access becomes possible when the rotation of the recording medium is synchronized.

[Brief explanation of drawings]

FIG. 1 is a schematic side sectional view showing the mechanical components of a disk device according to the present invention and a block diagram of a control system, FIGS. 2 and 3 are schematic diagrams showing its operating state, and FIG. 4 is a conventional FIG. 5 is a schematic side sectional view showing the mechanical components of the disk device and a block diagram of the control system, and FIG. 5 is a schematic diagram showing the operating state thereof. 1 (la, lb) -(*ki disk 2 (2
a, 2b) ...Spindle motor 3 (3
a, 3b) - Magnetic head 4 (4a4b)...
Magnetic head circuit 5 (5a, 5b)...actuator 6 (6a, 6b)...actuator motor 8 (8a, 8b)...spindle motor controller 9 (9a, 9b) - servo body modulator 10 (10a10b) ) - Servo controller 11 (lla, 1lb) - Servo driver 12
...Pulse detector 13...Data recovery 14...Storage controller 16...Ink face In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A rotating recording medium having circumferential tracks on which information is to be recorded; a head for recording information on the tracks of the recording medium; and a head for reading information from the tracks of the recording medium; a moving means for moving the head in the radial direction of the recording medium to a desired track by a seek operation; controlling the head and the moving means to record information on the desired track of the recording medium; and a first control means for reading information from a desired track of one of the systems; A second control means for reading information from the recording medium and, during that time, giving predetermined information to the first control means of the other system to cause the moving means to perform a seek operation. disk device.