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. 24, 2025
Filed:
Sep. 19, 2023
Hitachi, Ltd., Tokyo, JP;
Shugo Ogawa, Tokyo, JP;
Yoshihiro Yoshii, Tokyo, JP;
Ryosuke Tatsumi, Tokyo, JP;
Tomohiro Yoshihara, Tokyo, JP;
Yusuke Nonaka, Tokyo, JP;
Hiroshi Miki, Tokyo, JP;
Hitachi Vantara, Ltd., Yokohama, JP;
Abstract
Performance deterioration of a storage system is prevented. A storage controller includes one or more processors, and one or more memories configured to store one or more programs to be executed by the one or more processors. The one or more processors are configured to execute conversion of converting metadata before conversion for controlling the storage system into metadata after conversion in a format corresponding to a new controller newly installed in the storage system, execute control of switching an access destination between the metadata before conversion and the metadata after conversion according to an access control code during the conversion, and access the metadata before conversion without using the access control code before start of the conversion.