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

Claim 0:
1. A magnetic disk device comprising:
a magnetic disk;
a magnetic head that is positioned on a track having a predetermined track pitch of the magnetic disk, writes data to the track of the magnetic disk, and reads data from the track of the magnetic disk; and
a controller that controls positioning of the magnetic head, and registers an address of a sector of the track in which the data is written and a positioning error of the magnetic head with respect to the track at the address, determines whether or not a positioning error of a second sector that is two tracks ahead in a radial direction of a first sector to which the data is written is registered, and when the positioning error of the second sector is registered, sets a first threshold that allows a write operation for a positioning error of the first sector based on the positioning error of the second sector, and determines whether or not the positioning error of the first sector exceeds the first threshold, and stops the write operation when the positioning error of the first sector exceeds the first threshold.