Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsTakato Uchida, Naomichi Ikeda
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Abstract
A magnetic disk device includes a case including a magnetic disk, a magnetic head configured to read or write data from or to the magnetic disk, an actuator configured to move the magnetic head, and a humidity sensor positioned within the case to measure a humidity in the case and output a measurement value; a control circuit configured to calculate a value of a voltage to be applied to the actuator based on a displacement amount of the magnetic head and the measurement value output from the sensor, and output the calculated value; and a servo controller configured to control the actuator by applying the voltage to the actuator according to the value output by the control circuit.
Claims20
A magnetic disk device comprising:
- a case housing
- a magnetic disk,
- a magnetic head configured to read or write data from or to the magnetic disk,
- an actuator configured to move the magnetic head, and
- a humidity sensor positioned within the case to measure a humidity within the case and output a measurement value;
- a control circuit configured to
- calculate a value of a voltage to be applied to the actuator based on a displacement amount of the magnetic head per unit voltage and the measurement value output from the sensor, and
- output the calculated value;
- and
- a servo controller configured to control the actuator according to the value output by the control circuit.
A magnetic disk device comprising:
- a case housing
- a magnetic disk,
- a magnetic head configured to read or write data from or to the magnetic disk,
- an actuator configured to move the magnetic head, and
- a temperature sensor positioned within the case to measure a temperature in the case and output a measurement value;
- a control circuit configured to
- calculate a value of a voltage to be applied to the actuator based on a displacement amount of the magnetic head per unit voltage and the measurement value output from the sensor, and
- output the calculated value;
- and
- a servo controller configured to control the actuator according to the value output by the control circuit.
A method for controlling a magnetic disk device, the method comprising:
- measuring a humidity or a temperature in a case of the magnetic disk device, the case housing:
- a magnetic disk,
- a magnetic head configured to read or write data from or to the magnetic disk, and
- an actuator configured to move the magnetic head;
- calculating a value of a voltage to be applied to the actuator based on a displacement amount of the magnetic head per unit voltage and the measurement value;
- and
- controlling the actuator by applying the voltage to the actuator according to the calculated value.
Dependencies are inferred from the claim text.