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. 01, 2025
Filed:
Aug. 09, 2023
Western Digital Technologies, Inc., San Jose, CA (US);
Brian Johnson, Laguna Hills, CA (US);
Jaesoo Byoun, Irvine, CA (US);
Gaku Ikedo, Fujisawa, JP;
Hideaki Ito, Fujisawa, JP;
Naoyuki Kagami, Fujisawa, JP;
Hiroki Watanabe, Fujisawa, JP;
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
A data storage device comprises a lead actuator that actuates a first read-write head over a first disk and a support actuator that actuates a second read-write head over a second disk. A spindle motor rotates the first and second disks. In response to an emergency power off (EPO) event, a processing device retracts and parks the actuators using an internal supply voltage generated from a back electromotive force (BEMF) voltage of the spindle motor, and brakes the spindle motor. The spindle motor is not braked until both the lead and support actuators have been retracted and parked.