| 摘要 |
PROBLEM TO BE SOLVED: To precisely detect a cylinder as a boundary even in a storage medium having one head, and to prevent deterioration in servo quality. SOLUTION: The storage device extracts a difference obtained by subtracting predetermined cylinder information detected using the servo information written from the outermost cylinder by normal servo from the cylinder information detected using the servo information written from the innermost cylinder by double servo and not overwritten from the outermost cylinder. When the head is positioned over a track at the inner side of the border at the predetermined cylinder, the storage device uses the head to read servo information obtained by adding the extracted difference to the position of the track, and controls the position of the head by using the read servo information. COPYRIGHT: (C)2009,JPO&INPIT
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