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US 2004/0105186 A1Published application
Method for servo writing and disk drive with servo control system
AssigneeKabushiki Kaisha Toshiba
InventorKoji Yano
Life of this patent
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Abstract
In a disk drive, a disk medium includes servo areas on which servo data is recorded and data areas on which data is recorded. In each of data tracks in, e.g., an outer radius of the disk medium, the inclination θ2 of the servo data recorded on the servo areas is smaller than the inclination θ1 of the data recorded on the data areas.
Claims12
A disk drive comprising:
- a head which reads/writes data from/to a disk medium that rotates;
- an actuator which includes the head and rotates in a radial direction of the disk medium to move the head to a target point;
- and
- a controller which controls the actuator to position the head in the target point in accordance with serve data read from the disk medium by the head,
- wherein the disk medium includes a number of data tracks having servo areas and data areas and, when the head records data on the data areas in one of outer and inner radiuses of the disk medium, the servo data whose inclination differs from that of the data is recorded on the servo areas in one of the outer and inner radiuses.
2 more elements
A servo write method that is applied to a disk drive including a head which reads/writes data from/to a disk medium that rotates and an actuator which moves the head to a target point, the method comprising:
- using a servo head whose skew angle θ2 differs from a skew angle θ1 of the head;
- and
- recording servo data to position the head on servo areas in each of data tracks of the disk medium at an inclination different from that of data recorded on data areas by the head with the skew angle θ1.
Dependencies are inferred from the claim text.