The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 2021
Filed:
Feb. 27, 2020
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Hiroshi Tani, Kawasaki Kanagawa, JP;
Hiroyuki Suzuki, Kamakura Kanagawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo, JP;
Abstract
A magnetic disk device includes a magnetic disk, a first read element, a second read element, and a controller. In the magnetic disk, first servo information is written. The controller controls the servo writing of second servo information on the magnetic disk, based on the first servo information. In addition, the controller controls acquisition of the first servo information by the first read element. The controller switches a read element to be used to control the servo writing from the first read element to the second read element based on quality of the first servo information acquired by the first read element.