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AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsTakuya Ogawa, Shinichirou Kouhara, Wataru Tsukahara
Estimating the term…
A controller for a magnetic disk device acquires a reproduction signal of servo burst data while moving a magnetic head along data tracks that intersect servo tracks at a plurality of points. The controller acquires correction values for correcting repeatable runout on a per servo sector basis based on the reproduction signal. The correction values include a first correction value, which is a correction value for a servo sector at a position where the data track and the servo track are substantially parallel to each other and a second correction value, which is a correction value fora servo sector at a position where the data track and the servo track are not substantially parallel to each other. The controller adjusts the first correction value based on the second correction value, and writes the correction values including the adjusted first correction value onto a magnetic disk.
A magnetic disk device comprising:
A method of manufacturing a magnetic disk device comprising a magnetic head and a magnetic disk having a surface on which servo burst data are written, the servo burst data defining a plurality of servo tracks in a form of concentric circles and a plurality of servo sectors arranged on the plurality of servo tracks along a circumferential direction of the magnetic disk, the method comprising:
Dependencies are inferred from the claim text.