JPH0464984A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent head crush caused by the seek operation of an actuator for stored data reading / writing head by providing an actuator for auxiliary head loading an auxiliary head for removing duct. CONSTITUTION:When an actuator seek instruction 201 for stored data reading/ writing head is not inputted for more than fixed time, a control circuit 1 outputs an actuator seek instruction 202 for auxiliary head to a driving circuit 3 according to the over-flow of a timer 2. Since the driving circuit 3 executes a cleaning seek operation for an actuator 103 for auxiliary head according to a driving signal 203 so as not to interfer an actuator 102 for stored data read / write head, dust is prevented from being stuck in an HDA or on a magnetic disk, and the head crush caused by the seek operation of the actuator for read / write head can be prevented.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a magnetic disk device.

[Conventional technology]

A magnetic disk drive includes a head disk assembly (hereinafter referred to as HDA) in which a magnetic head, an actuator that drives the magnetic head, and a magnetic disk are housed in a sealed container, and the magnetic head reads and writes data to the magnetic disk. The contact star l-stop (C3S) starts and stops while the magnetic head remains in contact with the magnetic disk.
method is adopted.

[Problem to be solved by the invention]

In the above-mentioned conventional magnetic disk drive, if the magnetic head is kept positioned on the same cylinder for a long time after repeatedly performing positioning operations (hereinafter referred to as seek operations), dust and magnetism inside the HDA will be generated. Since the dust on the disk accumulates on the magnetic disk at positions corresponding to both end portions of the magnetic head, there is a problem in that a head crash does not occur during the next seek operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic disk device that can prevent head crashes caused by seek operations of actuators for data read and damage heads.

[Means to solve the problem]

A magnetic disk device of the present invention houses a magnetic disk and an actuator for a storage data read/write head that carries a magnetic head that reads and writes storage data on the magnetic disk and performs a positioning operation in a sealed container. In the magnetic disk drive, the auxiliary head actuator includes an auxiliary head for removing dust from the magnetic disk, a drive circuit that drives the auxiliary head actuator, and a drive circuit that controls the drive circuit to control the auxiliary head. It has a control circuit that controls the reciprocating movement of the head actuator independently of the movement of the direct storage data read/write head actuator.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of one embodiment of the present invention.

HD A 1.01 of the same embodiment includes a rotary storage data read/write head actuator 102 having a storage data read/write head, and a rotary auxiliary head actuator 10 having an auxiliary spatula 1 to 3.
3, an auxiliary head actuator, and 7- an auxiliary head actuator drive circuit 3 for driving the ator 103, and a control circuit 1 having a built-in timer 2 for controlling the auxiliary head actuator drive circuit 3. .

Next, the operation of this embodiment will be explained in section 1-. Control circuit 1
If the actuator seek command 201 for the on-device storage data read/write head is not input for a certain period of time,
When the timer 2 overflows, an auxiliary head actuator seek command 202 is output to the auxiliary head actuator drive circuit 3. The auxiliary head actuator drive circuit 3 causes the auxiliary head actuator 103 to perform a cleaning seek operation using the auxiliary head actuator drive signal 203 so as not to interfere with the storage data read/write head actuator 102 .

〔Effect of the invention〕

As described below, the present invention provides an auxiliary head actuator, its 11I control circuit, and drive circuit, and performs a cleaning seek operation to remove dust.
By preventing dust from accumulating inside A and on the magnetic disk F at both ends of the magnetic head, it is possible to prevent a head crash caused by a seek operation of the actuator for the storage data read/write head.

Actuator for 103... Actuator for auxiliary head, 201... Actuator seek command for storage data read/write head, 202...
・・Auxiliary head actuator seek command, 203・
-...- Actuator drive signal for auxiliary spatula 1~.

Agent Patent Attorney Oto Uchihara

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the present invention. ]...--Control circuit, 2... Timer, 3.
・−・−・Auxiliary head actuator drive circuit, ]0
1...T(DA, 102...Stored data read/write head No.

Claims (1)

[Claims] In a magnetic disk device in which a magnetic disk and an actuator for a storage data read/write head that carries a magnetic head for reading and writing storage data on the magnetic disk and performs a positioning operation are housed in a sealed container, the magnetic an auxiliary head actuator equipped with an auxiliary head for removing dust from a disk; a drive circuit for driving the auxiliary head actuator; A magnetic disk device comprising a control circuit that independently controls the movement of an actuator for a storage data read/write head.