Patent ID: 11887633
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The magnetic disk device according to claim 2, wherein
the controller
sets a second threshold configured to determine registration of the positioning error of the first sector,
determines whether or not the positioning error of the first sector exceeds the second threshold,
determines presence or absence of a registered positioning error in the first sector,
determines whether or not directions of the positioning error of the first sector and the registered positioning error match in either the radial inner direction or the outer radial direction,
determines whether or not an absolute value of the positioning error of the first sector is larger than the registered positioning error, and
registers the positioning error of the first sector when the positioning error of the first sector exceeds the second threshold, and the registered positioning error in the first sector exists, and the directions of the positioning error of the first sector and the registered positioning error match, and the absolute value of the positioning error of the first sector is larger than the registered positioning error.