| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a disk storage device wherein an offset value is measured precisely even when an offset is greatly changed by one rotation of a disk. Ž<P>SOLUTION: A disk drive 1 is disclosed which has an offset measuring function for measuring a dynamic offset value necessary to a dynamic offset control using a DTM type disk 10. A CPU 17 writes offset measuring position information to an optimum position of lands on the disk 10 and calculates a dynamic offset value based on the offset measuring position information. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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