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.
Claims1
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, the method comprising:
- positioning the first magnetic head over a first disk surface with the voice-coil motor, a first microactuator coupled to the voice-coil motor, 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, a second microactuator coupled to the voice-coil motor, 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.
Dependencies are inferred from the claim text.