JP2001195846A - Disk device and information processing system using the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device which makes it possible to obtain a low-noise effect without degrading performance. SOLUTION: An MPU 11 of the disk device reads the time data from a present time discriminating means 20 and selects/controls the seek operation mode of the circuit constitution attenuating the high-frequency component of analog data from the inside of a seek operation controller 15 which has plural seek operation modes and is capable of discretely controlling the seek operation modes in accordance with the time data. When the MPU 11 executes the low- noise seek operation mode, the high-frequency component of the analog data 100 passing a notch filter 16 through a digital-to-analog converter 13 in the disk device 1 attenuates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device and an information processing system using the same, and more particularly, to a disk device and a host device having the disk device.

[0002]

2. Description of the Related Art Conventionally, in a disk device, a plurality of disks (disks) serving as storage media are stacked, and thousands of tracks are allocated on each disk. It moves (seeks) to the target track while keeping the gap, and reads and writes signals.

In recent years, control of a disk drive requires high-speed data transfer. Therefore, when seeking (moving) the head, it is necessary to rotate the disk medium at high speed or move the head itself at high speed. Seek noise is generated, and the seek noise contains many high-frequency components that cause discomfort to humans.

In order to solve this noise problem, Japanese Patent Laid-Open No.
No. 5,303,827 discloses a hard disk drive control method and apparatus, and a personal computer (hereinafter, referred to as a personal computer).
Conventional example 1), a personal computer described in JP-A-11-126422 (hereinafter referred to as Conventional example 2), a disk device described in JP-A-07-334950 (hereinafter referred to as Conventional example 3), and the like. Proposed.

In the above proposed method, a low noise effect can be obtained by selecting a unique seek operation mode from a plurality of seek operation modes. For example, the conventional example 1 is characterized in that a current is cut off by a motor driver and the moving speed of the head is reduced to obtain a low noise effect. Further, in Conventional Example 2 and Conventional Example 3, Reference Example 1 is used.
As with, you can reduce the rotation speed of the disk media,
It is characterized in that a low noise effect is obtained by a method of reducing the moving speed of the head.

[0006]

In the above-mentioned conventional disk drive, the moving speed of the head is reduced or the rotational speed of the disk medium is reduced in order to obtain a low noise effect. And the performance of the disk device itself is degraded.

In a conventional disk device, when a disk is frequently accessed, a high-speed access can be selected by a switch (SW). However, depending on the use situation of a user, for example, the disk is frequently accessed. When used only under such conditions, a low noise effect may not be obtained.

An object of the present invention is to solve the above-mentioned problems and to provide a disk device capable of obtaining a low noise effect without deteriorating performance and an information processing system using the same.

[0009]

According to the present invention, there is provided a disc apparatus for discriminating a current time, a means for selecting a low noise seek operation mode based on time data obtained from the discriminating means, and a selection therefor. Means for controlling the seek operation from among a plurality of modes in accordance with the set mode.

[0010] An information processing system according to the present invention is an information processing system including at least a disk device for storing data. The disk device includes means for selecting a seek operation mode and means for controlling a seek operation from among a plurality of modes in accordance with the selected mode.

That is, the disk device of the present invention selects / controls the seek operation mode from the time data. The seek operation mode here is characterized by attenuating high frequency components of analog data.

More specifically, the disk device of the present invention
Time data is acquired from the current time discriminating means, and a specific seek operation is selected / controlled from among a plurality of seek operation modes based on the time data, and a high frequency component of analog data is attenuated in the specific seek operation selected at that time. Circuit.

Thus, by automatically selecting the low-noise seek operation mode according to the user's use conditions, it is possible to realize a low-noise effect without lowering the performance.

[0014]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a disk drive according to one embodiment of the present invention. In FIG. 1, a disk drive 1 is an MPU (Micro Proc).
essing Unit) 11 and A / D (analog /
Digital) converter 12, D / A (digital / analog) converter 13, position error signal generating circuit 14, seek operation control unit 15, notch filter 16, VCM
(Voice coil motor) It comprises a driver 17, a disk drive 18, a switch (SW) 19, and a current time discriminating means 20.

The MPU 11 controls the disk device 1 itself. The D / A converter 13 converts digital data, which is a VCM drive signal from the address / data bus 100, into analog data. The disk drive 18 drives a disk-shaped storage medium (not shown) and a head (not shown).

The position error signal generation circuit 14 generates a position error signal from a signal from the disk drive 18. A /
The D converter 12 converts analog data, which is a position error signal generated from the position error signal generation circuit 14, into digital data.

The seek operation control section 15 has a plurality of seek operation modes, and individually controls the plurality of seek operation modes. Notch filter 16 eliminates mechanical resonance. The VCM driver 17 controls current to a VCM (not shown). The switch 19 sets whether to execute the low noise seek operation mode. The current time determination means 20 acquires time data, and the MPU 11 confirms the set time.

FIG. 2 is a flowchart showing the processing operation of the disk device 1 according to one embodiment of the present invention. The processing operation of the disk device 1 according to one embodiment of the present invention will be described with reference to FIGS. The processing operation shown in FIG. 2 is realized by the MPU 11 executing a program in a control memory (not shown).
(Read only memory), IC (integrated circuit) memory, and the like can be used.

First, the MPU 11 of the disk device 1 checks the setting of the switch 19, and confirms whether or not the low noise seek operation mode can be executed and the set time (step S in FIG. 2).
1). When the low-noise seek operation mode is executable, the MPU 11 obtains the current time data from the current time discriminating means 20 and confirms the content (step S2 in FIG. 2), and if the time data is the set time (step S3 in FIG. 2). ), The seek operation control unit 15 is controlled to select / set a seek operation mode (step S4 in FIG. 2).

When the MPU 11 executes the low noise seek operation mode (step S5 in FIG. 2), the D
The effect of attenuating the high-frequency component of the analog data 100 passing through the / A converter 13 and passing through the notch filter 16 can be obtained.

When the low noise seek operation mode is not set or is not set time (steps S1, S2 in FIG. 2)
3), the MPU 11 sets and executes the normal seek operation mode (Step S7 in FIG. 2). The above processing operation is repeatedly performed until the entire processing is completed (step S1 in FIG. 2).
~ S7).

For example, the normal seek operation mode here is mode # 1 in the seek operation control unit 15, and the low noise seek operation mode is mode #n. of course,
It does not matter if the MPU 11 of the disk device 1 can set the seek operation mode. Therefore, the low-noise seek operation mode is the mode # 1 in the seek operation control unit 15 and the normal seek operation mode is the mode #n. .

In the process of selecting the low-noise seek operation mode based on the time data, it is assumed that the low-noise seek operation mode is executed at a time when ambient noise is small, such as at night, and that the seek noise is not so noticeable. By setting the normal seek operation mode to be executed in a time zone such as the daytime, a low noise effect can be obtained in a unit of time.

As a circuit configuration for attenuating high-frequency components of the analog data 100, a low-pass filter circuit may be used. In this case, in the present embodiment, it is possible to realize the circuit configuration as one of the modes in the seek operation control unit 15.

As a characteristic of the low-pass filter circuit, since it has an effect of cutting off a frequency higher than a certain set frequency, a circuit configuration for removing a high frequency component included in a large amount of seek noise is provided in the same manner as described above. Thus, the effect of attenuating the high frequency component of the analog data passing through the D / A converter 13 in the disk device 1 and passing through the notch filter 16 can be obtained.

Similarly, as a circuit configuration for attenuating high-frequency components of the analog data 100, a band-pass filter circuit may be used. Also in that case, it is possible to realize by applying a circuit configuration as one of the modes in the seek operation control unit 15.

The characteristics of the bandpass filter circuit include:
Since some high-frequency or low-frequency components can be removed and components with a certain frequency bandwidth can be passed, the circuit configuration is designed to remove high-frequency components that are often included in seek noise, just as when using a low-pass filter circuit. Is performed, the D / A converter 13 in the disk device 1 is
To attenuate high-frequency components of analog data that pass through the notch filter 16.

When the current time discriminating means 20 is configured using time information from a clock, it can be realized with the same configuration as in this embodiment, and can be controlled in the same manner as in this embodiment.

FIG. 3 is a block diagram showing the configuration of a disk drive according to another embodiment of the present invention. In FIG. 3, the second embodiment of the present invention is the same as the embodiment of the present invention except that the second A / D converter 21 is provided in the disk device 2 and the time information included in the broadcast stream is used. The same components are denoted by the same reference numerals. The operation of the same component is the same as that of the embodiment of the present invention.

The second A / D converter 21 converts the broadcast stream signal, which is analog data, into digital data after receiving it. Time information data is extracted from the digital data converted by the second A / D converter 21 by the current time determination means 20.

The subsequent processing is the same as in the embodiment of the present invention.
The seek operation control unit 15 is controlled according to the content of the time data to select / set the seek operation mode. When the low noise seek operation mode is executed, the D in the disk device 1 is changed.
The effect of attenuating the high-frequency component of the analog data 100 passing through the / A converter 13 and passing through the notch filter 16 can be obtained.

FIG. 4 is a block diagram showing the configuration of an information processing system according to another embodiment of the present invention, and FIG. 5 is a block diagram showing the configuration of a disk drive according to another embodiment of the present invention. 4 and 5, an information processing system 4 according to another embodiment of the present invention includes a current time determination unit 20.

In one embodiment of the present invention, the disk device 1 has the present time discriminating means 20. In this embodiment, except that the disk device 3 does not have the present time discriminating means 20, one embodiment of the present invention is described. The configuration is similar to that of the example, and the same components are denoted by the same reference numerals. The operation of the same component is the same as that of the embodiment of the present invention.

That is, in another embodiment of the present invention, the current time discriminating means 20 is provided in the information processing system 4 including the disk device 3. The disk device 3 itself is controlled by an information processing system 4, and the information processing system 4 has a CPU (Central Processing Unit) 5 that controls its own system.

The CPU 5 of the information processing system 4 checks the setting of the switch 19 via the MPU 11 of the disk device 3, and checks whether or not the low noise seek operation mode can be executed and the set time.

After the CPU 5 of the information processing system 4 obtains the current time data from the current time discriminating means 20, the seek operation control unit 15 is controlled by the contents of the time data to perform the seek operation, as in the embodiment of the present invention. When the mode is selected / set and the low noise seek operation mode is executed,
The effect of attenuating the high frequency component of the analog data 100 passing through the D / A converter 13 in the disk device 3 and passing through the notch filter 16 can be obtained.

In one embodiment, another embodiment, and another embodiment of the present invention, the case where a magnetic disk device is used as the disk devices 1 to 3 has been described. However, the same applies to an optical disk device such as a CD-ROM. Similar effects can be obtained.

As described above, since the method of attenuating the high frequency component in the seek noise by the circuit configuration such as the low-pass filter is used, the low noise effect can be obtained without deteriorating the performance of the disk devices 1 to 3 themselves. Can be.

Further, since the time data is used for realizing the low noise effect, even when the user constantly accesses the disk frequently, the seek operation mode is automatically switched at a certain time. As a result, the low noise effect can be obtained, so that the low noise effect can be obtained irrespective of the use situation of the user.

[0040]

As described above, according to the present invention, the discriminating means for discriminating the current time, the means for selecting the low noise seek operation mode based on the time data obtained from the discriminating means, By providing means for controlling the seek operation from among a plurality of modes in accordance with the selected mode, it is possible to obtain a low noise effect without lowering the performance.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a processing operation of the disk device according to one embodiment of the present invention.

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

FIG. 4 is a block diagram showing a configuration of an information processing system according to another embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a disk device according to another embodiment of the present invention.

[Explanation of symbols]

 1-3 Disk device 4 Information processing system 5 CPU 11 MPU 12 A / D converter 13 D / A converter 14 Position error signal generation circuit 15 Seek operation control unit 16 Notch filter 17 VCM driver 18 Disk drive 19 Switch 20 Current time Determination means 21 second A / D converter 100 analog / data bus

Claims (13)

[Claims] 1. A discriminating means for discriminating a current time, a means for selecting a low noise seek operation mode based on time data obtained from the discriminating means, and a seek operation in a plurality of modes according to the selected mode. Means capable of being controlled from among the following. 2. The disk drive according to claim 1, further comprising a circuit for attenuating high frequency components in an audible frequency band when the low noise seek operation mode is selected. 3. The disk drive according to claim 2, wherein the circuit for attenuating the high-frequency component comprises a low-pass filter circuit. 4. The circuit according to claim 2, wherein the circuit for attenuating the high-frequency component comprises a band-pass filter circuit.
The disk device as described above. 5. The apparatus according to claim 1, wherein the determination unit determines the current time from time information from a clock circuit provided in the own device. Disk unit. 6. The apparatus according to claim 1, wherein said determining means determines the current time using time information included in an external broadcast stream.
The disk device according to any one of the above. 7. An information processing system including at least a disk device for storing data, wherein a discriminating means for discriminating a current time, and a low noise seek operation mode is selected based on the time data obtained from said discriminating means. An information processing system comprising: a disk device; and means for controlling a seek operation from among a plurality of modes in accordance with the selected mode. 8. The information processing system according to claim 7, wherein the disk device includes a circuit for attenuating high frequency components in an audible frequency band when the low noise seek operation mode is selected. Disk device. 9. The information processing system according to claim 8, wherein the circuit for attenuating the high-frequency component comprises a low-pass filter circuit. 10. The information processing system according to claim 8, wherein the circuit for attenuating the high-frequency component comprises a band-pass filter circuit. 11. The apparatus according to claim 7, wherein the determining means determines the current time from time information from a clock circuit provided in the apparatus. Information processing system. 12. The apparatus according to claim 7, wherein the determination unit determines the current time by using time information included in an external broadcast stream. Information processing system. 13. The information processing system according to claim 7, wherein said discriminating means is provided outside said disk device.