Patent ID: 11862213
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. A magnetic disk device comprising:
a disk that has a track comprising a first servo sector and a second servo sector that is different from the first servo sector;
a head that writes data to the disk and reads data from the disk; and
a controller that records first signal strength record data related to a signal strength at which first target servo data that is a target of the first servo sector is read, and standardizes first signal strength data related to a signal strength at which the first target servo data is read when the first target servo data is read,
wherein
the head has a first read head and a second read head that read data from the disk, and
when the first target servo data is read by the first read head and the second read head, the controller calculates first averaged signal strength record data in which the first signal strength record data in which the first target servo data is read by the first read head and second signal strength record data related to a signal strength at which the first target servo data is read by the second read head are averaged, calculates first averaged signal strength data in which the first signal strength data read from the first target servo data by the first read head and second signal strength data related to a signal strength read from the first target servo data by the second read head are averaged, and standardizes the first averaged signal strength data to first averaged standardized data based on the first averaged signal strength record data.