Hard disk drive having dual micro-actuators on carriage arms
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsKoichiro Miyamoto, Kenichiro Oozeki, Yu Chen
Life of this patent
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Abstract
According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.
Claims20
A hard disk drive comprising:
- a first recording surface;
- a second recording surface;
- a first magnetic head that performs reading/writing on the first recording surface;
- a first actuator that moves the first magnetic head;
- a second actuator that moves the first magnetic head and the first actuator in an integrated manner;
- a second magnetic head that performs reading/writing on the second recording surface;
- a third actuator that moves the second magnetic head;
- a fourth actuator that moves the second magnetic head and the third actuator in an integrated manner;
- a fifth actuator that moves the second actuator and the fourth actuator in an integrated manner;
- a drive circuit that implements at least one of a first mode in which the first actuator and the third actuator perform same operation and the second actuator and the fourth actuator perform different operations or a second mode in which the second actuator and the fourth actuator perform same operation and the first actuator and the third actuator perform different operations;
- and
- a controller that controls the drive circuit.
A hard disk drive comprising:
- a plurality of recording surfaces including a first recording surface and a second recording surface;
- a first magnetic head that performs reading/writing on the first recording surface;
- a second magnetic head that performs reading/writing on the second recording surface;
- a first actuator and a second actuator that move the first head;
- a third actuator and a fourth actuator that move the second head;
- a fifth actuator that moves the second actuator and the fourth actuator in an integrated manner;
- a drive circuit that switches a combination of actuators to be operated independently among the first to fourth actuators;
- and
- a controller that controls the drive circuit;
- wherein the first actuator, the second actuator and the fifth actuator constitute a triple stage actuator (TSA), and the third actuator, the fourth actuator and the fifth actuator constitute a triple stage actuator (TSA).
A hard disk drive comprising:
- a plurality of recording surfaces including a first recording surface and a second recording surface;
- a first magnetic head that performs reading/writing on the first recording surface;
- a second magnetic head that performs reading/writing on the second recording surface;
- a first actuator and a second actuator that move the first head;
- a third actuator and a fourth actuator that move the second head;
- at least one signal generation circuit that outputs a plurality of digital signals different from each other for controlling any of the first actuator, the second actuator, the third actuator, and the fourth actuator;
- and
- a drive circuit including a plurality of converters that receives different digital signals and converts the digital signals into analog signals, a plurality of amplifiers that amplifies the analog signals output from the converters and outputs the analog signals, and a switch having at least one end and another end, one end of the switch being electrically connected to the converter, and the other end being electrically connected to the amplifier.
Dependencies are inferred from the claim text.