| 摘要 |
In an embodiment of the present invention, with Self Servo Write (SSW), a head slider is used to perform AC erase to a recording surface of a magnetic disk. The AC erase is performed asynchronously to every track. A frequency for use with AC erase, i.e., a frequency of an AC erase pattern is three times or higher than a burst frequency of a product servo pattern or a burst frequency of a radial pattern. By satisfying such requirements, for the magnetic disk of vertical magnetic recording, it becomes possible to substantially stop adversely affecting pattern reading in an AC erase area.
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