Inventor
TATSUMI RYOSUKE
US38 patents
⚠️ This page may combine multiple inventors who share the name “TATSUMI RYOSUKE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
34 patentsUS11543972B1Jan 3, 2023
Storage system and control method thereof
HITACHI LTD3 citations73
US11200172B2Dec 14, 2021
Storage system and method of controlling storage system
HITACHI LTD2 citations73
US11327653B2May 10, 2022
Drive box, storage system and data transfer method
HITACHI LTD2 citations72
US10739999B2Aug 11, 2020
Computer system having data amount reduction function and storage control method
HITACHI LTD2 citations72
US12340108B2Jun 24, 2025
Metadata access and conversion during storage system controller update
HITACHI LTD0 citations62
US11836386B2Dec 5, 2023
Storage system and method of controlling storage system that set ports associated with a logical unit
HITACHI LTD0 citations62
US11816336B2Nov 14, 2023
Storage system and control method thereof
HITACHI LTD0 citations62
US11714751B2Aug 1, 2023
Complex system and data transfer method
HITACHI LTD0 citations62
US11429316B2Aug 30, 2022
Multi controller storage system and method of controlling multi controller storage system
HITACHI LTD0 citations62
US11334508B2May 17, 2022
Storage system, data management method, and data management program
HITACHI LTD0 citations62
US11237962B2Feb 1, 2022
Complex system and data transfer method
HITACHI LTD0 citations62
US11080192B2Aug 3, 2021
Storage system and storage control method
HITACHI LTD1 citations62
US10936518B2Mar 2, 2021
Storage system, data management method, and data management program
HITACHI LTD1 citations62
US11755249B2Sep 12, 2023
Storage system including storage nodes to determine cache allocations to implement cache control
HITACHI LTD0 citations60
US11347432B2May 31, 2022
Storage system including storage nodes to determine cache allocations to implement cache control
HITACHI LTD0 citations60
US11836393B2Dec 5, 2023
Storage system and control method of migrating storage control unit based on maximum amount of mountable storage control units
HITACHI LTD0 citations59
US11461032B1Oct 4, 2022
Storage controller replacement and firmware upgrade without service interruption
HITACHI LTD1 citations59
US12481564B2Nov 25, 2025
Method and system for preventing service level agreement violations in backup-as-a-service
HITACHI LTD0 citations58
US11086562B2Aug 10, 2021
Computer system having data amount reduction function and storage control method
HITACHI LTD0 citations52
US10884924B2Jan 5, 2021
Storage system and data writing control method
HITACHI LTD0 citations52
US12367115B2Jul 22, 2025
Storage system
HITACHI LTD0 citations51
US11960771B2Apr 16, 2024
Storage system and data management method
HITACHI LTD0 citations51
US11853582B2Dec 26, 2023
Storage system
HITACHI LTD0 citations51
US11675545B2Jun 13, 2023
Distributed storage system and storage control method
HITACHI LTD0 citations51
US11455105B2Sep 27, 2022
Storage system and data management method of switching access authority
HITACHI LTD0 citations51
US11330056B2May 10, 2022
Storage system and controller location method
HITACHI LTD0 citations51
US11301159B2Apr 12, 2022
Storage system and data transfer method
HITACHI LTD0 citations51
US11256585B2Feb 22, 2022
Storage system
HITACHI LTD0 citations51
US11201788B2Dec 14, 2021
Distributed computing system and resource allocation method
HITACHI LTD0 citations51
US11093134B2Aug 17, 2021
Storage device, management method, and program in tiered storage system
HITACHI LTD0 citations51
US12105972B2Oct 1, 2024
Storage system and storage control method of data deduplication between virtual devices
HITACHI LTD0 citations50
US11914868B2Feb 27, 2024
Storage system, method for moving drives, and non-transitory computer-readable medium
HITACHI LTD0 citations50
US11861205B2Jan 2, 2024
Distributed storage system and volume migration method
HITACHI LTD0 citations50
US9977813B2May 22, 2018
Storage device and data migration method
HITACHI LTD0 citations40