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公开(公告)号：US11461032B1
公开(公告)日：2022-10-04
申请号：US17472837
申请日：2021-09-13
申请人： Hitachi, Ltd.
IPC分类号： G06F3/06
摘要： A storage system includes: a storage drive having a storage medium storing a data; and a plurality of storage control units having a processor, a memory, and a port to process the data input and output to and from the storage drive, in which information related to a list of the storage control units mounted on the storage system and a maximum number of the storage control units that can be mounted on the storage system is allowed to be stored, and in which, when the storage control unit is replaced, it is determined whether the configuration to be migrated from the storage control unit to be reduced to the storage control unit to be added is migrated directly or via another storage control unit based on the number of the mounted storage control units and the maximum number of the storage control units that can be mounted.
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公开(公告)号：US10969985B1
公开(公告)日：2021-04-06
申请号：US17007119
申请日：2020-08-31
申请人： Hitachi, Ltd.
摘要： In a case of exchanging a migration source storage controller and a migration destination storage controller sharing one storage medium during replacement of storage devices, when hardware configurations or data management forms of the storage controllers are different, data in the storage medium cannot be shared even when data management information can be copied. Accordingly, a storage system, having a storage control unit and a storage drive provided with a storage medium, includes data management information for accessing data in the storage drive. A first storage control unit copies data management information about the data in the storage drive to a second storage control unit. When a write request is received from a host after copying of the data management information begins, each of the first storage and second storage control units stores write data related to the write request in a separate storage area of the storage drive.
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公开(公告)号：US11836393B2
公开(公告)日：2023-12-05
申请号：US17714281
申请日：2022-04-06
申请人： Hitachi, Ltd.
IPC分类号： G06F3/06
CPC分类号： G06F3/0689 , G06F3/0607 , G06F3/0632
摘要： A storage system includes: a storage drive having a storage medium storing a data; and a plurality of storage control units having a processor, a memory, and a port to process the data input and output to and from the storage drive, in which information related to a list of the storage control units mounted on the storage system and a maximum number of the storage control units that can be mounted on the storage system is allowed to be stored, and in which, when the storage control unit is replaced, it is determined whether the configuration to be migrated from the storage control unit to be reduced to the storage control unit to be added is migrated directly or via another storage control unit based on the number of the mounted storage control units and the maximum number of the storage control units that can be mounted.
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公开(公告)号：US11543989B2
公开(公告)日：2023-01-03
申请号：US17208129
申请日：2021-03-22
申请人： Hitachi, Ltd.
摘要： In a case of exchanging a migration source storage controller and a migration destination storage controller sharing one storage medium during replacement of storage devices, when hardware configurations or data management forms of the storage controllers are different, data in the storage medium cannot be shared even when data management information can be copied. Accordingly, a storage system, having a storage control unit and a storage drive provided with a storage medium, includes data management information for accessing data in the storage drive. A first storage control unit copies data management information about the data in the storage drive to a second storage control unit. When a write request is received from a host after copying of the data management information begins, each of the first storage and second storage control units stores write data related to the write request in a separate storage area of the storage drive.
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公开(公告)号：US10572171B2
公开(公告)日：2020-02-25
申请号：US15769424
申请日：2016-02-29
申请人： Hitachi, Ltd.
发明人： Nobumitsu Takaoka , Akira Yamamoto , Tomohiro Kawaguchi , Yasuo Watanabe , Yoshihiro Yoshii , Kazuki Matsugami
IPC分类号： G06F3/06
摘要： A storage system according to an aspect of the present invention includes one or more storage devices for storing write data to which a write request from a host computer is directed, and a storage controller that provides one or more volumes to the host computer. Further, the storage system manages the time when a write request is last received from the host computer for each partition within the volume. Then, the storage controller performs a deduplication process upon detecting the partition not receiving a write request for a predetermined time or more from the time when the write request is last received.
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公开(公告)号：US11836386B2
公开(公告)日：2023-12-05
申请号：US17881945
申请日：2022-08-05
申请人： Hitachi, Ltd.
IPC分类号： G06F3/06
CPC分类号： G06F3/0659 , G06F3/0607 , G06F3/067 , G06F3/0619 , G06F3/0622 , G06F3/0658 , G06F3/0679
摘要： In a multi controller storage system, hardware and software are updated without interruption. The storage system including a node has storage control units each including a processor, a memory, and a port; and a storage drive, and the storage control units each request data access and transmit and receive data with respect to a host computer via the ports. The processors process input and output data from the host computer, the memories store the control information in order to access the data stored in the storage drive, and the storage system transmits the control information stored in the memories to another node, stores the control information in the memories of the storage control units, and sets ports of the other node in consideration of a relationship between the storage control units and the ports of the nodes, if the other node can access data relating to the control information.
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公开(公告)号：US20230113507A1
公开(公告)日：2023-04-13
申请号：US17691253
申请日：2022-03-10
申请人： Hitachi, Ltd.
发明人： Kazuki Matsugami , Akira Deguchi
摘要： 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.
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公开(公告)号：US11294578B2
公开(公告)日：2022-04-05
申请号：US16860237
申请日：2020-04-28
申请人： HITACHI, LTD.
IPC分类号： G06F3/06 , G06F9/54 , G06F12/0802
摘要： With omission of a duplication process of compressed data, a cache access frequency is reduced to improve throughput. A storage system includes first and second control units and a storage drive. Upon receiving a data write command, the first control unit stores data to be subjected to the write command in a first cache area of the first control unit, and stores the data in a second cache area of the second control unit to perform duplication, and upon completion of the duplication, the first control unit transmits a response indicating an end of write, performs a predetermined process on the data to be subjected to the write command, stores the data in a buffer area, reads the data stored in the buffer area, and transmits the read data to the storage drive.
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公开(公告)号：US20190303022A1
公开(公告)日：2019-10-03
申请号：US16117330
申请日：2018-08-30
申请人： HITACHI, LTD.
IPC分类号： G06F3/06 , G06F12/0802 , G06F9/54
摘要： With omission of a duplication process of compressed data, a cache access frequency is reduced to improve throughput. A storage system includes first and second control units and a storage drive. Upon receiving a data write command, the first control unit stores data to be subjected to the write command in a first cache area of the first control unit, and stores the data in a second cache area of the second control unit to perform duplication, and upon completion of the duplication, the first control unit transmits a response indicating an end of write, performs a predetermined process on the data to be subjected to the write command, stores the data in a buffer area, reads the data stored in the buffer area, and transmits the read data to the storage drive.
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公开(公告)号：US12124337B2
公开(公告)日：2024-10-22
申请号：US18119147
申请日：2023-03-08
申请人： Hitachi, Ltd.
CPC分类号： G06F11/1464 , G06F3/0619 , G06F3/0653 , G06F3/0673 , G06F11/1458 , G06F11/1662 , G06F2201/84
摘要： A data store volume (DSVOL) for a snapshot group which is a group of the PVOL and one or more SVOLs for the PVOL is a data storage region where data of which a storage destination is one volume (VOL) of the snapshot group and meta-information of the data are stored, and the meta-information is information including address mapping between a reference source address which is an address of a position of the data in the snapshot group and a reference destination address which is an address of a position of the data in the DSVOL. A process of a storage system increases the number of DSVOLs in the snapshot group when an input/output (I/O) load on the snapshot group exceeds a threshold.
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