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. 17, 2025
Filed:
Mar. 10, 2022
Hitachi, Ltd., Tokyo, JP;
Kazuki Matsugami, Tokyo, JP;
Akira Deguchi, Tokyo, JP;
HITACHI VANTARA, LTD., Yokohama, JP;
Abstract
This invention prevents valid data written from a healthy host from being lost when restoring data corrupted by a host infected by malware from a backup. In the disclosed storage system, a storage controller records history of data updates to data in volumes made by hosts (host computers) as update history information (an update history management table) with information that can identify the hosts respectively. When having been requested to restore data in a particular volume of the volumes with specifications of a host for which to invalidate data updates and a date and time to do so, based on the update history information, the storage controller invalidates data updates made by the specified host after the specified date and time, whereas keeping data updates valid made by a host different from the specified host after the specified date and time, and restores the particular volume.