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:
Dec. 15, 2020
Filed:
Dec. 11, 2018
Fujitsu Limited, Kawasaki, JP;
Kazuhiro Urata, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A control device receives a first request signal for requesting to write first data in a first logical address area of a logical volume set stores the first data in a physical volume in accordance with the first request signal, erases, after receiving the first request signal, the first data in the first logical address area of the logical volume without erasing the first data in the physical volume, and when executing a first erasure processing for erasing the first data in the physical volume, holds the first data in the physical volume, in a case where history information for indicating that a second erasure processing has been executed prior to the first erasure processing is held, and erases the first data in the physical volume, in a case where the history information is not held.