US 12,277,956 B2
Magnetic disk device, method of controlling magnetic disk device, and computer program product
Kenichiro Oozeki, Yokohama Kanagawa (JP); and Yu Chen, Sagamihara 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 Jan. 26, 2024, as Appl. No. 18/424,104.
Claims priority of application No. 2023-093996 (JP), filed on Jun. 7, 2023.
Prior Publication US 2024/0412760 A1, Dec. 12, 2024
Int. Cl. G11B 5/54 (2006.01); G11B 5/48 (2006.01); G11B 20/10 (2006.01); G11B 33/08 (2006.01)
CPC G11B 5/4826 (2013.01) 18 Claims
OG exemplary drawing
 
1. A magnetic disk device comprising:
a first MA (micro actuator) amplifier configured to drive a first micro actuator that positions a corresponding magnetic head;
a second micro actuator configured to position a corresponding magnetic head;
a second MA amplifier configured to drive the second micro actuator; and
a controller configured to, when performing switching from an MA amplifier of a switching source in an on state to an MA amplifier of a switching destination in an off state, start up the MA amplifier of the switching destination while maintaining the MA amplifier of the switching source in the on state, and perform the switching from the MA amplifier of the switching source to the MA amplifier of the switching destination after a predetermined time elapses, wherein
the predetermined time is set as a time in which vibration accompanying switching of a micro actuator corresponding to the MA amplifier of the switching destination is smaller than a predetermined magnitude.