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7397630 |
Signal reproducing method and storage apparatus
A signal reproducing method reproduces servo information recorded on a recording medium by use of a head. A current calculation related to a current and an observer calculation related to a...
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7394613 |
Control device, disk device, and seek orbit generation method
A waveform generator generates an acceleration orbit, a velocity orbit, and a position orbit from the seek time. Each orbits multiplied by respective gains, whereupon the orbits are synthesized by...
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7382570 |
Dynamically controlling seek profile in an acceleration tracking seek controller
Methods of controlling seeking of a transducer that is adjacent to a rotatable disk in a disk drive are disclosed. The methods may include accelerating the transducer radially across the rotatable...
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7375917 |
Idle seek calibration method for magnetic disk drive and magnetic disk drive with an intermission calibration
When an idle seek operation of a magnetic disk drive is executed under a velocity control utilizing a back electromotive force of a VCM actuator, the accuracy of the velocity control is...
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7369352 |
Apparatus, medium, and method with seek servo control considering temperature change
An apparatus, medium, and method to control a disk drive, and in particular, an apparatus, medium, and method controlling a disk drive to perform a seek mode at an optimum state with respect to an...
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7362538 |
Torque constant correction method in multiple sinusoidal seek servo and disk drive using the same
A disk drive control method and apparatus. In particular, a torque constant correction method and apparatus in a disk drive using a multiple sinusoidal seek servo scheme. The torque constant...
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7359141 |
Servo control method, apparatus using the same, and recording medium having program for executing the method
The sequential seek method includes calculating a seek length by comparing a cylinder number of a current track with a cylinder number of a target track; checking if the seek length corresponding...
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7359140 |
Method and apparatus of acceleration-based track seeking servo control of disk drive
A method and apparatus directed to acceleration-based track-seeking servo control of a disk drive, which minimize jerk generated at the start and end of track seeking, thereby reducing mechanical...
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7352527 |
Disk drive that balances seek speed and seek acoustics
A disk drive selects seek speed and seek acoustics based on a history of seek requests from a host computer. The history of seek requests can include time intervals between seek requests, seek...
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7349171 |
Method for measuring actuator velocity during self-servo-write
A system comprises a positioning module, a frequency measuring module, a simulation module, and a control module. The positioning module positions an actuator arm adjacent to a track to read...
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7333292 |
Seek servo control method for adapting to supply voltage variation and disk drive using the same
A seek servo control method and device for a disk drive device for performing seek servo control according to a variation in a power supply voltage for the disk drive. The seek servo control method...
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7315432 |
Track-seek control method of HDD and recording medium suitable for the same
A seek control method of smoothly changing to a coast mode and a deceleration mode in a track-seek control device according to a multi-sinusoidal acceleration trajectory, a recording medium...
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