Servo information recording method and magnetic storage apparatus
AssigneeShowa Denko K.K.
InventorsHideaki Takahoshi, Daisuke Amiya, Hiroshi Sakai
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Abstract
A servo information recording method continuously records servo information in a radial direction of a magnetic disk on a plurality of concentric tracks or on a single spiral track of a first recording layer that forms a magnetic layer of the magnetic disk together with a second recording layer to which data are recorded and from which data are reproduced, wherein the first recording layer has a coercivity higher than that of the second recording layer, and partially overlaps two mutually adjacent tracks when continuously recording the servo information on an entire surface of the first recording layer.
Claims11
A servo information recording method comprising:
- continuously recording, by a magnetic head, servo information in a radial direction of a magnetic disk on a plurality of concentric tracks or on a single spiral track of a first recording layer that forms a magnetic layer of the magnetic disk together with a second recording layer to which data are recorded and from which data are reproduced, wherein the first recording layer has a coercivity higher than that of the second recording layer;
- and
- partially overlapping two mutually adjacent tracks when continuously recording the servo information on an entire surface of the first recording layer in the radial direction from an inner peripheral side towards an outer peripheral side of the magnetic disk, or from the outer peripheral side towards the inner peripheral side of the magnetic disk,
- wherein a distance between the magnetic head and the first recording layer is longer than a distance between the magnetic head and the second recording layer during the continuously recording.
A magnetic storage apparatus comprising:
- a magnetic disk continuously recorded with servo information in a radial direction thereof on a plurality of concentric tracks or on a single spiral track of a first recording layer that forms a magnetic layer together with a second recording layer to which data are recorded and from which data are reproduced, wherein the first recording layer has a coercivity higher than that of the second recording layer, and two mutually adjacent tracks of the continuously recorded servo information on an entire surface of the first recording layer partially overlap each other;
- a magnetic head configured to reproduce the servo information from the first recording layer of the magnetic disk, and to record data to or reproduce data from the second recording layer of the magnetic disk;
- and
- a signal processing part configured to perform a signal processing on input data to supply a recording signal to the magnetic head, and to perform a signal processing on a signal reproduced from the magnetic disk by the magnetic head to supply reproduced data to an outside of the magnetic storage apparatus,
- wherein a distance between the magnetic head and the first recording layer is longer than a distance between the magnetic head and the second recording layer.
Dependencies are inferred from the claim text.