Disk storage apparatus and method for servo controlling
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United States of America Patent
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Dec 2, 2014
Issued Date -
N/A
app pub date -
Mar 13, 2013
filing date -
Nov 30, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
According to one embodiment, a disk storage apparatus includes a servo system. The servo system includes a state observer and performs a seek operation up to a target position with a current position of a head undetermined. The servo system performs the seek operation based on initial values including a temporary position, while allowing the state observer to operate based on the initial values, until the current position is determined. The servo system determines the current position based on the servo data read from the plurality of servo areas by the read module and a result of estimation by the state observer.
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