Disk storage apparatus and servo control method
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United States of America Patent
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Aug 12, 2014
Grant Date -
N/A
app pub date -
Sep 4, 2013
filing date -
Apr 18, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to one embodiment, a disk storage apparatus includes a read controller and a servo controller. The read controller contains a combined position generator including a state observer and a combined position calculator. The servo controller controls a seek operation of the head based on the combined position. The servo controller stores the servo information in a memory and determines an occurrence of a state offset as an error between an actual position of the head and the combined position. The servo controller corrects the predicted position by the state observer based on the servo information stored in the memory and the combined position when the occurrence of the state offset is detected.
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