| 摘要 |
A magnetic disk apparatus includes a magnetic head slider in which a magnetic head element is mounted, a magnetic disk to which recording and reproduction of data are made by means of the magnetic head element, a spindle motor which rotatably supports the magnetic disk, and a controller for controlling the rotational speed of the magnetic disk in each proper idle time that recording or reproduction is not made after completion of recording or reproduction to the magnetic disk by the magnetic head element until next recording or reproduction time.
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