MAGNETIC DISK STORAGE DEVICE AND METHOD CONTROLLING OF MAGNETIC DISK STORAGE DEVICE
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Jun 22, 2010
filing date -
Jun 29, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
According to one embodiment, a magnetic disk storage device includes a magnetic disk, a head, a clock generator, an estimating module, and a controller. The magnetic disk includes a servo area and a corresponding data area, and has a surface divided into zones in the radial direction. The basic frequency varies in the servo area depending on the zones. The head is driven to read a signal from the magnetic disk. The clock generator generates a clock signal for decoding a signal read from the data area corresponding to the servo area based on a signal read from the servo area. The estimating module estimates the position of the servo area in the radial direction, from which the head reads a signal next. The controller controls the clock generator to generate a clock signal of the basic frequency before the head reaches the servo area based on the estimated position.
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