JPH05128835A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent the destruction of data by detecting the generation of the dust to be the cause for a head clash and knowing the sign for the head clash by the detection of this dust. CONSTITUTION:A dust counter 3 is provided within a disk enclosure which hermetically houses a magnetic head 1 and a magnetic disk medium 2 and a buzzer 5 is provided on a PKGA 4a. A buzzer 5 is sounded by the dust detection signal from the dust counter 3. As a result, the data is registered into another device before the data is destroyed by the head clash occurring in the dust, by which the destruction of the data is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device, and more particularly to detection of dust in a disk enclosure that hermetically houses a magnetic head and a magnetic disk.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk device of this type does not have a dust detecting means in a disk enclosure that hermetically houses a magnetic head and a magnetic disk, and detects dust even in the disk enclosure. It is a structure that cannot be done.

A conventional magnetic disk device will be described with reference to the drawings.

FIG. 2 is a sectional view of a conventional magnetic disk device.

In FIG. 2, the conventional magnetic disk device performs magnetic disk medium 2 arranged on a spindle 8 and rotated by a spindle motor (not shown), and data writing / reading on the magnetic disk medium 2 is performed. The magnetic head 1 and a head drive unit that drives the magnetic head 1 to perform a seek operation and a base plate 7 to which a spindle is fixed are included, and a disk enclosure having a structure covered and covered with a cover 6 is provided. The parts are a magnet housing 9, a magnet 10, a coil 11, and a shaft 12.
And a bearing 13 and a support 14. Then, writing / reading of data by the magnetic head 1 is performed by the PKGb 4b, and the seek operation is controlled by the head drive unit.

As described above, since the inside of the disk enclosure is hermetically sealed, there should be no dust, but a slight amount of dust is mixed in during assembly of the device, wear of the operating part during operation of the device, and magnetic head. In the magnetic disk device that performs contact start / stop (so-called CSS) between the magnetic disk medium and the magnetic disk medium,
Dust is generated little by little.

However, the conventional magnetic disk device does not have a mechanism for detecting this dust.

[0008]

The above-described conventional magnetic disk device has a structure in which even if dust is generated in the disk enclosure, it cannot be detected. Therefore, the magnetic head in which dust floats at a height of submicron. And a magnetic disk medium enter between them and a head crash (a phenomenon in which the magnetic head collides with the magnetic disk medium and the data stored in the magnetic disk medium is destroyed. If left unattended, it progresses on the storage surface of the magnetic disk medium. ) It has the drawback of causing it.

Although a head crash may occur due to a cause other than dust, in this case also, since the magnetic disk device has no mechanism for detecting dust, the dust generated by the head crash cannot be detected and data destruction progresses. There is a drawback that it does.

Further, there is a drawback that it is not possible to determine how long the problem will occur because it is not possible to know the elapsed time of dust generation.

An object of the present invention is to solve the above-mentioned drawbacks and to have a dust detecting means in a disk enclosure for hermetically containing a magnetic head and a magnetic disk medium, and to generate an alarm signal by the dust detection signal. By providing the alarm generation means, it is possible to detect the dust in the disk enclosure, register the data in another device before the data is destroyed by the head crash due to the dust, and prevent the data from being destroyed. By detecting dust in the early stage, the head crash that occurs in the system can be detected and the data can be prevented from being completely destroyed. Furthermore, the dust detected by the dust detection means in the memory on the control package. By storing the generation amount and time of dust, it is possible to know the elapsed time of dust generation and It is to provide a magnetic disk apparatus which can grasp the life of the disk device.

[0012]

A magnetic disk device according to the first aspect of the present invention comprises a magnetic disk medium arranged on a spindle and rotated by a spindle motor, and a magnetic head for writing / reading information on / from the magnetic disk medium. In a magnetic disk device having a sealed disk enclosure that includes a head drive unit that drives a magnetic head to perform a seek operation and a base plate that fixes a spindle, a dust that detects dust in the disk enclosure in the disk enclosure. It has a detection means.

The magnetic disk device of the second aspect of the present invention is the magnetic disk device of the first aspect of the present invention, further comprising dust alarm generating means for generating an alarm signal in response to a detection signal from the dust counter.

A magnetic disk device according to the third aspect of the present invention is the magnetic disk device according to the first aspect of the present invention, which has means for storing the amount of dust detected by the dust detecting means and the time when the dust occurs.

[0015]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a sectional view of a magnetic disk device according to an embodiment of the present invention.

In FIG. 1, the magnetic disk device of the present embodiment is arranged on a spindle 8 to rotate a magnetic disk medium 2 by a spindle motor (not shown), and to write / read data on / from the magnetic disk medium 2. A magnetic head 1 to be performed, and a base plate 7 to which a spindle is fixed and a head drive unit that drives the magnetic head 1 to perform a seek operation.
And a disk enclosure having a structure in which the disk enclosure is sealed by being covered with a cover 6, and the head drive section thereof has a magnet housing 9, a magnet 10, a coil 11, and a shaft 12.
And the bearing 13 and the support 14, and the dust counter 3 is mounted on the base plate 7. Then, the magnetic head 1 is composed of the PKGa4a having the memory 15.
The writing / reading of data by means of, the head drive unit controls the seek operation, etc., and the buzzer 5 is operated by the dust detection signal of the dust counter 3.

Here, the magnetic head 1 is floating above the rotating magnetic disk medium 2 at a height of submicron. At this time, if dust is generated in the disk enclosure, the dust counter 3 detects this and PGKa4
The buzzer 5 on the a sounds to notify the abnormality. At this point, the use of the device is stopped and the data is registered in another device to prevent the data from being destroyed by the head crash.

A head crash may occur due to factors other than dust. In this case as well, the dust counter 3 detects the generation of dust due to the head crash in the initial stage, and the buzzer 5 on the PKGa 4a sounds and an abnormality is detected. The user is informed that the same measures as above are taken to prevent the data from being completely destroyed or the data from being destroyed.

When the amount of dust generated and the time detected by the dust counter 3 are stored in the memory 15 on the PKCa 4a and the user wants to know the amount of dust and the elapsed time of dust generation, those data are stored in the memory 15. To read and use.

In the above description, the dust counter 3 is used as the dust detecting means and the buzzer 5 is used as the dust alarm generating means, but it goes without saying that other means can be used.

[0022]

As described above, the magnetic disk device of the present invention has the dust detecting means in the disk enclosure that hermetically accommodates the magnetic head and the magnetic disk medium, and the alarm signal is generated by the dust detection signal. By providing a dust alarm generating unit that generates dust, it is possible to detect the dust in the disk enclosure and register the data in another device before the data is destroyed by the head crash due to the dust and prevent the data from being destroyed. effective.

Further, the head crash caused by factors other than dust can be detected by detecting dust at an early stage.
Since the occurrence can be detected, it is possible to prevent the data from being completely destroyed.

Further, by storing the amount and time of dust generation detected by the dust detecting means in the memory on the control package, it is possible to know the elapsed time of dust generation and to grasp the life of the magnetic disk device. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a sectional view of a magnetic disk device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional magnetic disk device.

[Explanation of symbols]

 1 Magnetic Head 2 Magnetic Disk Medium 3 Dust Counter 4a PKGa 4b PKGb 5 Buzzer 6 Cover 7 Base 8 Spindle 9 Magnet Housing 10 Magnet 11 Coil 12 Shaft 13 Bearing 14 Support 15 Memory

Claims (3)

[Claims] 1. A magnetic disk medium arranged on a spindle and rotated by a spindle motor, and a magnetic head for writing / reading information on / from the magnetic disk medium.
In a magnetic disk device having a sealed disk enclosure that includes a head drive unit that drives the magnetic head and performs a seek operation and a base plate that fixes the spindle, in the disk enclosure, dust in the disk enclosure is removed. A magnetic disk device comprising a dust detecting means for detecting. 2. The magnetic disk device according to claim 1, further comprising a dust alarm generating means for generating an alarm signal according to a detection signal from the dust counter. 3. The magnetic disk device according to claim 1, further comprising a unit that stores the amount of dust detected by the dust detection unit and the time when the dust is generated.