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:
Jun. 14, 2022
Filed:
Aug. 23, 2019
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Hirotaka Nakagawa, Tokyo, JP;
Akihiro Hara, Tokyo, JP;
Assignee:
HITACHI, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 3/06 (2006.01); G06F 9/455 (2018.01);
U.S. Cl.
CPC ...
G06F 3/0652 (2013.01); G06F 3/067 (2013.01); G06F 3/0608 (2013.01); G06F 3/0659 (2013.01); G06F 9/45558 (2013.01); G06F 2009/45583 (2013.01); G06F 2009/45595 (2013.01);
Abstract
There is provided a storage device that is connected to a computer and receives an UNMAP command to cancel a relationship between a logical address and a physical address provided to the computer, in response to data deletion on the computer. The storage device includes a control unit configured to make data stored in a physical address specified by the UNMAP command irreversible.