JPH01178188A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent a system from failing by detecting metallic powder floating in the inside of a magnetic head and magnetic disk assembling body (HDA), controlling the operation of the HDA by judging the presence/absence of the metallic powder, and also, displaying the above state. CONSTITUTION:When a metallic powder detector 4 detects the metallic powder floating in the HDA 1 during rotating a magnetic disk medium 2 at high speed, the metallic powder detector 4 sends an output signal to inform the fact to a metallic powder judging circuit 5, and the metallic powder judging circuit 5 detects the signal, and sends a detection signal to a control part 6. The control part 6 inputs the signal from the metallic powder judging circuit 5 and informs it to a host device, and also, makes a state display part 7 display a fault by sending the signal, and stops the operation of the HDA 1. In such a way, it is possible to prevent the fault due to the damage of the magnetic disk medium 2 from being generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device including a magnetic head-magnetic disk assembly in which a magnetic head positioning mechanism and a magnetic disk medium are housed in a sealed container. Regarding equipment.

[Conventional technology]

Conventionally, in this type of magnetic disk drive, when metal powder is generated inside a magnetic head/magnetic disk assembly (hereinafter referred to as HDA) due to some factor, the metal powder circulates in a sealed container and is connected to the magnetic head. It enters between the magnetic disk media and damages the magnetic disk media. Such an abnormal state is detected when a read error occurs when the magnetic disk device is operated.

[Problem that the invention seeks to solve]

As mentioned above, in conventional magnetic disk drives,
When metal powder is generated inside the HDA and enters between the magnetic head and the magnetic disk medium, and even if the magnetic disk medium is scratched, the magnetic disk device does not operate according to commands from the host device. cannot detect this, and the configuration is such that the abnormal state can only be discovered once the magnetic disk drive is operating.

Therefore, conventional magnetic disk devices have the disadvantage that they cannot detect failures early or predict failures, and in the worst case, the stored information may be destroyed and the database in the computer system may be lost. There is.

[Means for solving problems]

The magnetic disk device of the present invention includes a magnetic head/magnetic disk assembly in which a magnetic disk medium and a magnetic head positioning mechanism are housed in a sealed FI container, and metal powder floating inside the magnetic head/magnetic disk assembly. A metal powder detector for detecting metal powder, a control unit for inputting an output signal of the metal powder detector to control the operation of the metal powder detector, and a status display unit for displaying the status of the magnetic head/magnetic disk assembly. It is equipped with

〔Example〕

Lacking drawings about the invention? This will be explained in detail with reference to the following.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, a magnetic disk device is usually 1. An access command from a host device is inputted to the control unit 6, and the magnetic head positioning mechanism 3 is driven to position the magnetic head in a designated cylinder of the magnetic disk medium 2, thereby executing a data writing or reading operation. The magnetic disk medium 2 and the magnetic head positioning mechanism 3 are housed in a sealed container and constitute a magnetic head/magnetic disk assembly (HDA') 1, and a metal powder detector 4 is provided inside the HDA. It is being When the metal powder detector 4 detects metal powder floating in the HDAl while the magnetic disk medium 2 is rotating at high speed, the metal powder detector 4 outputs a signal to notify this fact. The metal powder determination circuit 5 detects this and sends a detection signal to the control unit 6. The control section 6 inputs the signal from the metal powder determination circuit 5 and reports this to the host device, and also sends a signal to the status display section 7 to display a failure and stop the operation of the HDAl.

〔Effect of the invention〕

As explained above, the magnetic disk device of the present invention has H
By detecting metal powder inside the DA, it is possible to prevent failures due to damage to the magnetic disk medium. Therefore, in the operation of the computer system, system failures can be prevented by systematically performing switching to the standby machine, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. l...HDA, 2...magnetic disk medium, 3...magnetic head positioning mechanism, 4...
... Metal powder detector, 5 ... Metal powder judgment circuit, 6 ... Control section, 7 ... Status display section. Agent Patent Attorney Uchihara Oto 1st Area

Claims (1)

[Claims] a magnetic head/magnetic disk assembly containing a magnetic disk medium and a magnetic head positioning mechanism in a sealed container;
a metal powder detector that detects metal powder floating inside the magnetic head/magnetic disk assembly; a metal powder determination circuit that inputs an output signal of the metal powder detector to determine the presence or absence of metal powder; a control unit that controls the operation of the magnetic head/magnetic disk assembly based on the output of the metal powder determination circuit;
A magnetic disk drive comprising: a status display unit that displays the status of the magnetic head/magnetic disk assembly.