US 11,682,430 B2
Magnetic disk device
Osamu Yoshida, Kanagawa (JP); and Tatsuo Nitta, Tokyo (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed by Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Electronic Devices & Storage Corporation, Tokyo (JP)
Filed on Sep. 13, 2021, as Appl. No. 17/473,596.
Claims priority of application No. JP2021-048567 (JP), filed on Mar. 23, 2021.
Prior Publication US 2022/0310123 A1, Sep. 29, 2022
Int. Cl. G11B 5/58 (2006.01); G11B 21/08 (2006.01); G11B 5/012 (2006.01)
CPC G11B 21/08 (2013.01) [G11B 5/012 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A magnetic disk device comprising:
a plurality of magnetic disks;
a plurality of magnetic heads provided correspondingly to the plurality of magnetic disks and configured to carry out read/write of data from/to the magnetic disks; and
a control section configured to control read/write of the magnetic heads, wherein
each of the plurality of magnetic disks includes a first storage section storing therein control information concerning read/write of the magnetic head,
the control section switches the first storage section which is a storage destination of first information that is at least a part of the control information from the magnetic disk to another magnetic disk, controls to allow the switched original first storage section to store the first information therein again,
the plurality of magnetic disks are divided into a plurality of sets,
the control section switches the storage destination within the set each time the control section stores the control information, and
when a storage count of the control information reaches a specified value, the control section switches the storage destination from one set to the other set.