Patent ID: 11862204
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 including a track having a plurality of sectors;
a motor configured to rotate the magnetic disk;
a magnetic head; and
a controller configured to:
perform a first read operation of reading target sectors among the sectors of the track, with the magnetic head during a first revolution of the magnetic disk;
detect an off-track state of the magnetic head during the first revolution of the magnetic disk;
perform a first error correction with respect to data read from the target sectors during the first read operation; and
perform a second read operation of selectively reading a part of the target sectors for which the off-track state has been detected or for which the first error correction is unsuccessful, with the magnetic head during a second revolution of the magnetic disk.