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公开(公告)号：US20250077360A1
公开(公告)日：2025-03-06
申请号：US18601179
申请日：2024-03-11
Applicant: Hitachi, Ltd.
Inventor： Mitsuo HAYASAKA , Yuto KAMO , Akira YAMAMOTO
Abstract: When the latest data and a backup of the latest data are infected, the data is recovered from the backup older than the data. Therefore, it is necessary to eliminate a difference from the latest data, leading to loss of business opportunities. A data recovery system that recovers data stored in a storage system includes a storage device that holds original data, an analyzing server that holds a copy of the original data, and generates formatted data by formatting the copy data for analysis, a managing server that holds the copy data and data history management information storing a history of the formatted data, and a data recovery unit that refers to the data history management information, selects the copy data or the formatted data as recovery data, and recovers the data from the selected recovery data when a security threat is detected in the data.
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公开(公告)号：US20240361822A1
公开(公告)日：2024-10-31
申请号：US18469175
申请日：2023-09-18
Applicant: Hitachi, Ltd.
Inventor： Masanori TAKADA , Akira YAMAMOTO
IPC: G06F1/3234
CPC classification number: G06F1/3234
Abstract: When receiving power requirement for power control and performing power control of a target device in accordance with the received power requirement, based on power consumption for a performance of each component of the target device and a device configuration of the target device, power saving level management information is created, which respectively defines the performance of each component at each power saving level associated with each of a plurality of divided power consumption ranges of the target device, and based on a power consumption upper limit value or the power saving level of the target device designated as the received power requirement, the power saving level management information is referred to and the performance of each component is set to a performance of the power saving level according to the power requirement, respectively.
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公开(公告)号：US20220147456A1
公开(公告)日：2022-05-12
申请号：US17579746
申请日：2022-01-20
Applicant: Hitachi, Ltd.
Inventor： Akira YAMAMOTO , Ryosuke TATSUMI , Yoshinori OHIRA , Junji OGAWA
IPC: G06F12/0804 , G06F3/06 , G06F11/10
Abstract: In a complex system including; one or more storage systems including a cache and a storage controller; and one or more storage boxes including a storage medium, the storage box generates redundant data from write data received from a server, and writes the write data and the redundant data to the storage medium. The storage box transmits the write data to the storage system when it is difficult to generate the redundant data or it is difficult to write the write data and the redundant data to the storage medium. The storage system stores the received write data in the cache.
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公开(公告)号：US20190310925A1
公开(公告)日：2019-10-10
申请号：US16298619
申请日：2019-03-11
Applicant: HITACHI, LTD.
Inventor： Misato YOSHIDA , Masakuni AGETSUMA , Hideo SAITO , Tsukasa SHIBAYAMA , Akira YAMAMOTO
Abstract: A configuration of a redundancy group, which includes a control unit disposed in a storage node and set in an active mode for processing a request from a compute node and a control unit disposed in another storage node and set in a passive mode for taking over the process when a failure occurs in the control unit and the like, is inquired to the storage node, a plurality of paths from the compute node to a volume correlated with the redundancy group are set on the basis of the inquiry result, and the highest priority is set in a path connected to a storage node provided with the control unit of the active mode while the second highest priority is set in a path connected to a storage node provided with the control unit of the passive mode.
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公开(公告)号：US20190155684A1
公开(公告)日：2019-05-23
申请号：US16133039
申请日：2018-09-17
Applicant: HITACHI, LTD.
Inventor： Hiroaki AKUTSU , Akira YAMAMOTO
Abstract: In write processing of a data set group to be written to be one or more data sets to be written, a storage system performs encoding processing including processing for generating a data model showing regularity of the data set group to be written and having one or more input values as an input and the data set group as an output. In the write processing, the storage system writes the data model generated in the encoding processing and associated with a key of the data set group to be written.
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Patent Agency Ranking
公开(公告)号：US20190129971A1
公开(公告)日：2019-05-02
申请号：US16122907
申请日：2018-09-06
Applicant: Hitachi, Ltd.
Inventor： Kazuei HIRONAKA , Akira YAMAMOTO , Tomohiro KAWAGUCHI
IPC: G06F17/30
Abstract: A storage system having a deduplication function that stores a plurality pieces of data having duplicated content as one piece of data in a storage device, the storage system includes a processor and a controller including a memory, in which the controller includes a deduplication processing/address conversion unit which creates a first volume corresponding to an external device that transmits a write request and a read request and a second volume corresponding to the storage device, and converts an address of data deduplicated between the first volume and the second volume, and a deduplication determination unit which investigates a duplication level of each area of the first volume, and determines whether deduplication for each area is necessary, and the controller performs access control to the storage device based on the determination as to whether the deduplication is necessary.
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公开(公告)号：US20190012270A1
公开(公告)日：2019-01-10
申请号：US16081876
申请日：2016-06-15
Applicant: HITACHI, LTD.
Inventor： Miho IMAZAKI , Akira YAMAMOTO , Tomohiro YOSHIHARA , Kohei TATARA
IPC: G06F12/126 , G06F12/0804
Abstract: An information processing system including a processor, a memory, and a plurality of drives, wherein when a write request of new data is received, the processor stores the new data in the memory, transmits a response for the write request to a transmission source of the write request, reads old data updated by the new data from a first drive of the plurality of drives and old parity related to the old data from a second drive of the plurality of drives according to transmission of the response, store the old data and the old parity in the memory, generates new parity related to the new data from the new data, the old data, and the old parity stored in the memory, and stores the new data in the first drive to store the new parity in the second drive.
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公开(公告)号：US20180095873A1
公开(公告)日：2018-04-05
申请号：US15549283
申请日：2015-05-12
Applicant: HITACHI, LTD.
Inventor： Hiroshi NAKAGOE , Akira YAMAMOTO , Yoshihiro YOSHII
Abstract: A storage system selects from a plurality of physical areas constituting a physical address space as copy source physical areas, one or more non-additionally recordable physical areas each including a fragmented free area, and also selects a recordable physical area as a copy destination physical area. The storage system then writes one or more pieces of live data from the selected one or more copy source physical areas to the free area of the selected copy destination physical area on a per-strip or per-stripe basis, sequentially from the beginning of the free area. If the size of the write target data is such that it is not possible to write the write target data to the free area on a per-strip or per-stripe basis, then the storage system pads the write target data, and writes the padded write target data to the free area on a per-strip or per-stripe basis.
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公开(公告)号：US20180067851A1
公开(公告)日：2018-03-08
申请号：US15806644
申请日：2017-11-08
Applicant: HITACHI, LTD.
Inventor： Hiroaki AKUTSU , Akira YAMAMOTO , Shigeo HOMMA , Masanobu YAMAMOTO , Yoshinori OHIRA
IPC: G06F12/02 , G06F3/06 , G06F12/1009
Abstract: A storage system monitors the first access frequency of occurrence which is the access frequency of occurrence from a host device during a first period, and the second access frequency of occurrence which is the access frequency of occurrence from a host device during a second period shorter than the first period. Along with performing data relocation among the tiers (levels) in the first period cycle based on the first access frequency of occurrence, the storage system performs a decision whether or not to perform a second relocation based on the first access frequency of occurrence and the second access frequency of occurrence, synchronously with access from a host device. Here the threshold value utilized in a decision on whether or not to perform the first relocation is different from the threshold value utilized in a decision on whether or not to perform the second relocation.
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公开(公告)号：US20170123679A1
公开(公告)日：2017-05-04
申请号：US15128089
申请日：2014-04-22
Applicant: HITACHI, LTD.
Inventor： Yoshihiro YOSHII , Kazuei HIRONAKA , Akira YAMAMOTO , Norio SHIMOZONO
IPC: G06F3/06 , G06F12/0802
CPC classification number: G06F3/0608 , G06F3/06 , G06F3/0619 , G06F3/0661 , G06F3/0685 , G06F12/04 , G06F12/0802 , G06F12/0804 , G06F12/0868 , G06F12/1009 , G06F2212/1016 , G06F2212/1024 , G06F2212/262 , G06F2212/312 , G06F2212/401 , G06F2212/60
Abstract: A storage system is adapted for efficiency by defining beforehand a first size, which is the maximum data that can be read at one time, a second size, which is equal to or less than the first size, and a third size, which is a factor of the first size. A controller provides a virtual volume comprising a plurality of virtual pages. Upon receiving a write request, the controller allocates a pool area comprising a plurality of stripes of the first size, stores the write request data in a cache, and when writing the data stored in the cache to the storage device, compresses the data in accordance with the third size unit, selects a storage area in accordance with the second size unit, and writes the compressed data to the selected second size storage area sequentially from the start address of a free area without leaving spaces therebetween.
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