US 12,406,698 B1
Magnetic disk device and method of controlling the same
Yuma Kinohara, Yokohama Kanagawa (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. 11, 2024, as Appl. No. 18/830,907.
Claims priority of application No. 2024-062233 (JP), filed on Apr. 8, 2024.
Int. Cl. G11B 5/54 (2006.01); G11B 19/04 (2006.01); G11B 27/30 (2006.01)
CPC G11B 19/045 (2013.01) [G11B 27/3045 (2013.01); G11B 2220/2516 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A magnetic disk device comprising:
a circular magnetic disk including a plurality of tracks for data recording composed of a plurality of sectors arranged in a circumferential direction, the tracks being formed to be arranged in a radial direction;
a magnetic head provided to seek in the radial direction of the magnetic disk and which writs and reads data to and from the magnetic disk; and
a controller which controls rotation of the magnetic disk and seek of the magnetic head, wherein
the controller includes:
a first write control section of writing first data and second data to each of the sectors of a predetermined track among the tracks;
a second write control section of writing the first data to each of the sectors of a predetermined track among the tracks; and
a selection control section of, when receiving a write command, estimating the time required from start of a process of the first write control section to end of the process, and selectively executing the process of the first write control section or a process of the second write control section by comparing the estimated time with a time limit specified in advance.