Parallel micro-actuator ssw writing
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsThorsten SCHMIDT, Gary W. CALFEE, Gabor SZITA, Hieu PHAM
Life of this patent
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Abstract
A self servo-write process in performed on two or more recording surfaces simultaneously. In a dual-stage servo system, a first fine positioning servo system that includes a first microactuator independently controls the position of a first read/write head over a first recording surface of a hard disk drive, while a second fine positioning servo system that includes a second microactuator independently controls the position of a second read/write head over a second recording surface of the hard disk drive.
Claims19
A method of writing servo information in a disk drive that includes a voice-coil motor configured for coarse positioning of a first magnetic head and a second magnetic head, a first microactuator provided at an end of an actuator arm, coupled to the first magnetic head, and configured for fine positioning of the first magnetic head, and a second microactuator provided at the end of the actuator arm, coupled to the second magnetic head, and configured for fine positioning of the second magnetic head, the method comprising:
- positioning the first magnetic head over a first disk surface of a first disk with the voice-coil motor, the first microactuator, and a first servo controller that receives a first position signal from the first magnetic head and transmits a first correction signal based on the first position signal to the first microactuator;
- while positioning the first magnetic head over the first disk surface, writing servo information for a first track on the first disk surface with the first magnetic head and positioning the second magnetic head over a second disk surface of a second disk with the second microactuator, and a second servo controller that receives a second position signal from the second magnetic head and transmits a second correction signal based on the second position signal to the second microactuator;
- and
- while positioning the second magnetic head over the second disk surface, writing servo information for a second track on the second disk surface with the second magnetic head.
A disk drive comprising:
- a first magnetic head and a second magnetic head;
- a first microactuator provided at an end of an actuator arm, coupled to the first magnetic head, and configured for fine positioning of the first magnetic head;
- a second microactuator provided at the end of the actuator arm, coupled to the second magnetic head, and configured for fine positioning of the second magnetic head;
- a voice-coil motor configured for coarse positioning of at least the first magnetic head;
- and
- a first servo system configured to:
- position the first magnetic head over a first disk surface of a first disk with the voice-coil motor, the first microactuator, and a first servo controller that receives a first position signal from the first magnetic head and transmits a first correction signal based on the first position signal to the first microactuator;
- and
- while positioning the first magnetic head over the first disk surface, write servo information for a first track on the first disk surface with the first magnetic head;
- and
- a second servo system configured to:
- while the first servo system positions the first magnetic head over the first disk surface, position the second magnetic head over a second disk surface of a second disk with the second microactuator, and a second servo controller that receives a second position signal from the second magnetic head and transmits a second correction signal based on the second position signal to the second microactuator;
- and
- while positioning the second magnetic head over the second disk surface, write servo information for a second track on the second disk surface with the second magnetic head.
19-20. (canceled)
Dependencies are inferred from the claim text.