Magnetic disk device, controller, and seeking method
AssigneeKabushiki Kaisha Toshiba
InventorsShihpo Hsu, Takeyori Hara
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Abstract
A magnetic disk device includes a magnetic disk having a plurality of tracks, a magnetic head used for writing data on the magnetic disk and reading data from the magnetic disk, a controller configured to control seek operations of the magnetic head, and a vibration sensor. The controller predicts a first vibration caused by a currently executed seek operation, based on a seek control signal, predicts a second vibration based on vibration detected by the sensor, and determines an adjusted start time of the currently executed seek operation so that a phase of the first vibration does not match a phase of the second vibration.
Claims16
A magnetic disk device comprising:
- a magnetic disk which includes a plurality of tracks;
- a magnetic head which is used for writing data on the magnetic disk and reading data from the magnetic disk;
- a controller configured to control seek operations of the magnetic head;
- and
- a vibration sensor,
- wherein the controller
- predicts a first vibration caused by a current seek operation, based on a seek control signal,
- predicts a second vibration based on vibration detected by the vibration sensor, and
- determines an adjusted start time for the current seek operation so that a phase of the first vibration does not match a phase of the second vibration.
In a magnetic disk device which includes a magnetic disk having a plurality of tracks, a magnetic head which is used for writing data on the magnetic disk and reading data from the magnetic disk, a controller that configured to control seek operations of the magnetic head, and a vibration sensor, a method of seeking the magnetic head, the method comprising:
- predicting a first vibration caused by a current seek operation, based on a seek control signal;
- predicting a second vibration based on vibration detected by the vibration sensor;
- and
- determining an adjusted start time for the current seek operation so that a phase of the first vibration does not match a phase of the second vibration.
A controller of a magnetic disk device which includes a magnetic disk having a plurality of tracks, a magnetic head which is used for writing data on the magnetic disk and reading data from the magnetic disk, and a vibration sensor, wherein the controller
- predicts a first vibration caused by a current seek operation, based on a seek control signal for moving the magnetic head to a target track,
- predicts a second vibration based on vibration detected by the vibration sensor, and
- determines an adjusted start time of the current seek operation so that a phase of the first vibration does not to match a phase of the second vibration.
Dependencies are inferred from the claim text.