Servo information detection method and disk apparatus using the same
AssigneeFujitsu Limited
InventorsHiroshi Ashikaga, Nobuyuki Suzuki
Life of this patent
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Abstract
In a servo information detection method and disk apparatus of the present invention, it is determined whether a pattern of detection bits, detected from a vicinity of a servo sync mark of a disk, matches with a given comparison bit pattern. A pattern of tolerance bits is changed based on a location of the disk where the servo sync mark is detected, so that the matching between the detection bit pattern and the comparison bit pattern is performed based on the changed tolerance bit pattern.
Claims18
A servo information detection method for detecting a servo sync mark of a disk, comprising the steps of:
- determining whether a pattern of detection bits, detected from a vicinity of the servo sync mark of the disk, matches with a given comparison bit pattern;
- and
- changing a pattern of tolerance bits based on a location of the disk where the servo sync mark is detected, so that the matching between the detection bit pattern and the comparison bit pattern is performed based on the changed tolerance bit pattern.
A disk apparatus in which a servo sync mark of a disk is detected, the disk apparatus comprising:
- a determination unit determining whether a pattern of detection bits, detected from a vicinity of the servo sync mark of the disk, matches with a given comparison bit pattern;
- and
- a control unit changing a pattern of tolerance bits based on a location of the disk where the servo sync mark is detected, so that the determination unit is allowed to perform the matching between the detection bit pattern and the comparison bit pattern based on the changed tolerance bit pattern.
Dependencies are inferred from the claim text.