Data storage device with assistive bursts in servo sectors
AssigneeWestern Digital Technologies, Inc.
InventorsGuoxiao Guo, Charles A. Park, Yun Hong, Scott A. Ottele, Gary Herbst, Satoshi Yamamoto
Life of this patent
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Abstract
Various illustrative aspects are directed to a data storage device, method, and one or more processing devices that are configured to: during a read operation, open a servo gate in the selected head in order to read the first servo bursts, the sync mark, and the second servo bursts in one of the servo sectors; and determine a position error signal for the selected head based on reading the first servo bursts and the second servo bursts.
Claims20
A data storage device, comprising:
- one or more disks each comprising a plurality of servo sectors defining a plurality of data tracks, wherein each of the servo sectors comprises first servo bursts followed by a sync mark followed by second servo bursts;
- an actuator mechanism configured to position a selected head among one or more heads proximate to a corresponding disk surface of a corresponding disk among the one or more disks;
- and
- one or more processing devices, individually or in combination, configured to:
- during a read operation, open a servo gate in the selected head to read the first servo bursts, the sync mark, and the second servo bursts in one of the servo sectors;
- and
- determine a position error signal for the selected head based on reading the first servo bursts and the second servo bursts.
A method comprising:
- during a read operation, opening a servo gate in a selected head to read first servo bursts followed by second servo bursts in a servo sector that is devoid of a preamble and devoid of a sync mark;
- determining a position error signal for the selected head based on reading the first servo bursts and the second servo bursts;
- and
- controlling a position of the selected head using the position error signal,
- wherein the opening the servo gate, the determining the position error signal, and the controlling the position of the selected head are performed by one or more processing devices individually or in combination.
One or more processing devices comprising, individually or in combination:
- means for opening a servo gate in a selected head, during a read operation, to read repeatable runout (RRO) correction data followed by a sync mark followed by servo bursts in a servo sector;
- means for generating a control signal for the selected head based on reading the RRO correction data and the servo bursts;
- and
- means for controlling a position of the selected head using the control signal.
Dependencies are inferred from the claim text.