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:
Jan. 27, 2026
Filed:
Mar. 12, 2024
Hitachi, Ltd., Tokyo, JP;
HITACHI VANTARA, LTD., Yokohama, JP;
Abstract
Storage controllers shift from a normal operation mode to a degraded operation mode in accordance with a command from a management apparatus. Each of the storage controllers in the normal operation mode works in the normal operation state. In transition from the normal operation mode to the degraded operation mode in accordance with a command from the management apparatus, a storage controller designated by the management apparatus changes from the normal operation state into the standing-by state and the other storage controllers except for the designated storage controller change from the normal operation state into the degraded operation state. The storage controller in the standing-by state changes into the degraded operation state in response to stop of a storage controller in the degraded operation state because of occurrence of a failure under the degraded operation mode.