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US 9,905,256 B1Granted
Magnetic disc apparatus
AssigneeKabushiki Kaisha Toshiba
InventorMakoto Asakura
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Abstract
According to one embodiment, servo patterns different in servo pattern frequency are recorded in zones divided in a radial direction on a magnetic disc, and the servo patterns in the adjacent zones overlap each other in a predetermined area from a zone servo boundary between the zones, and a determination boundary where it is determined to execute a crossing process is set within the overlapping area of the servo patterns upstream from the zone servo boundary, based on position information on a seek destination and the present position of the magnetic head.
Claims20
A magnetic disc apparatus comprising:
- a magnetic disc in which servo patterns different in servo pattern frequency are recorded in zones divided in a radial direction and the servo patterns in the adjacent zones overlap each other in a predetermined area from a zone servo boundary between the zones;
- a magnetic head provided for the magnetic disc;
- a determination unit that determines whether to execute a process of crossing over the zone servo boundary;
- and
- a setting unit that sets a determination boundary where it is determined to execute the crossing process within the overlapping area of the servo patterns upstream from the zone servo boundary, based on position information on a seek destination and the present position of the magnetic head.
2 more elements
Dependencies are inferred from the claim text.