公开(公告)号：US20220374165A1

公开(公告)日：2022-11-24

申请号：US17881945

申请日：2022-08-05

Applicant: Hitachi, Ltd.

Inventor： Ryosuke TATSUMI ,  Akira YAMAMOTO ,  Kazuki MATSUGAMI

IPC: G06F3/06

Abstract: 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.

公开(公告)号：US20220326870A1

公开(公告)日：2022-10-13

申请号：US17714281

申请日：2022-04-06

Applicant: Hitachi, Ltd.

Inventor： Ryosuke TATSUMI ,  Kazuki MATSUGAMI ,  Akira YAMAMOTO ,  Kenta SHINOZUKA

IPC: G06F3/06

Abstract: 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.

公开(公告)号：US20220121402A1

公开(公告)日：2022-04-21

申请号：US17561814

申请日：2021-12-24

Applicant: Hitachi, Ltd.

Inventor： Takashi NAGAO ,  Tomohiro YOSHIHARA ,  Akira YAMAMOTO ,  Yuusaku KIYOTA

IPC: G06F3/06 ,  H03M7/30

Abstract: The present invention realizes a storage device that has a high data reduction effect without decreasing I/O performances. The storage device includes a processor, an accelerator, a memory, and a storage medium, the processor specifies data to be compressed that is data stored in the storage medium from data stored in the memory and transmits a compression instruction including information relating to the data to be compressed to the accelerator, and the accelerator reads the plurality of continuous items of data from the memory and compresses the plurality of items of data to be compressed obtained by excluding data that is not to be compressed from the plurality of items of data, based on the information relating to the data to be compressed received from the processor, to generate compressed data stored in the storage device.

公开(公告)号：US20220066664A1

公开(公告)日：2022-03-03

申请号：US17194579

申请日：2021-03-08

Applicant: Hitachi, Ltd.

Inventor： Shugo OGAWA ,  Kazuki MATSUGAMI ,  Ryosuke TATSUMI ,  Akira YAMAMOTO

IPC: G06F3/06

Abstract: Each controller moves authority for access processing to data in a logical area allocated to the controller between the controllers, for a first storage area in which there is data related to the logical areas of the plurality of controllers by moving the authority for the access processing from a first controller to a second controller. Each of the first controller and the second controller writes data after update related to a write request to the storage area allocated to the own controller and deletes data before update in the first storage area, and moves data for which the own controller has the authority for the access processing in the first storage area to another storage area allocated to the own controller while taking over the allocation of the first storage area in relocation processing of relocating data.

公开(公告)号：US20200073584A1

公开(公告)日：2020-03-05

申请号：US16491520

申请日：2017-08-03

Applicant: Hitachi, Ltd.

Inventor： Akiyoshi TSUCHIYA ,  Keiichi MATSUZAWA ,  Mitsuo HAYASAKA ,  Akira YAMAMOTO

IPC: G06F3/06

Abstract: When a second storage device in a second site receives an update notification regarding a first element updated according to a write request from a first host, from a first storage device in a first site, for a second element specified on the basis of the update notification, the second storage device manages data of the first element corresponding to the second element as latest data. The first storage device provides a first volume capable of including a plurality of first elements. The second storage device provides a second volume capable of including a plurality of second elements corresponding to the plurality of first elements. When the second storage device receives a read request from a second host, the second storage device determines whether or not data of the first element corresponding to a read source second element (second element specified from the read request) is the latest data. When a determination result is true, the second storage device acquires the latest data from the first storage device and returns the latest data to the second host.

公开(公告)号：US20200050388A1

公开(公告)日：2020-02-13

申请号：US16297953

申请日：2019-03-11

Applicant: HITACHI, LTD.

Inventor： Masanori TAKATA ,  Hideo SAITO ,  Masakuni AGETSUMA ,  Takahiro YAMAMOTO ,  Akira YAMAMOTO

IPC: G06F3/06 ,  H04L29/08

Abstract: In an information system including a plurality of computers each of which includes a processor and a storage device, where the information system inputs/outputs data to/from the storage device based on a request from a client program, when migrating data stored in a migration source information system to a storage device of a self information system, the processor transmits an instruction to cause a client program exerted on the migration source information system as the data migration source to generate an access means to access the data to be migrated of the migration source information system, and stores the data to be migrated in the storage device of the information system using the access means generated by the client program of the migration source information system.

公开(公告)号：US20200019318A1

公开(公告)日：2020-01-16

申请号：US16030903

申请日：2018-07-10

Applicant: Hitachi, Ltd.

Inventor： Yuki SAKASHITA ,  Akira YAMAMOTO

IPC: G06F3/06

Abstract: In some examples, a system may include a computing device in communication with at least one storage device. Initially, the computing device may execute a first type of storage software which stores a first volume in a first storage format on the storage device. The computing device may thereafter execute a second type of storage software which configures a second volume in a second storage format on the storage device. Subsequently, the data of the first volume is migrated to the second volume where the data is stored in the second storage format. In some cases, the second storage software may further define a virtual external device on the storage device and define a logical path from the virtual external device to the first volume. The logical path may be used to migrate the data from the first volume to the second volume.

公开(公告)号：US20190138227A1

公开(公告)日：2019-05-09

申请号：US16119598

申请日：2018-08-31

Applicant: HITACHI, LTD.

Inventor： Akira YAMAMOTO ,  Akifumi SUZUKI

IPC: G06F3/06

Abstract: A storage system includes a flash storage in which a plurality of flash chips are accommodated and a storage controller that reads/writes data from and on the flash storage in response to a request from a high-order device, the flash chip capable of changing a mode of a cell of the flash chip to a first mode and a second mode in which an amount of storable information is less but a lifetime is longer than in the first mode, and a control method of the storage system is provided. The storage system includes: a prediction unit; a determination unit; and a mode change.

公开(公告)号：US20180253252A1

公开(公告)日：2018-09-06

申请号：US15755454

申请日：2016-09-21

Applicant: HITACHI, LTD.

Inventor： Akira YAMAMOTO ,  Atsushi KAWAMURA

IPC: G06F3/06 ,  G06F3/08

CPC classification number: G06F3/0641 ,  G06F3/0608 ,  G06F3/0613 ,  G06F3/0619 ,  G06F3/0679 ,  G06F3/0683 ,  G06F3/08 ,  G06F12/0246

Abstract: A storage system is provided that has a plurality of flash packages and a storage controller that controls read/write processing between a host and the flash packages. When data identical to data written in a second address of a second flash package of the plurality of flash packages is written to a first address of a first flash package of the plurality of flash packages, the storage system may store the second address in the first package in association with the first address, and perform deduplication. When the first flash package stores the second address in association with the first address and a read request for the first address is received from the storage controller, the first flash package may return the second address to the storage controller. In response to receiving the second address, the storage controller may acquire target read data from the second flash package.

公开(公告)号：US20180173632A1

公开(公告)日：2018-06-21

申请号：US15899659

申请日：2018-02-20

Applicant: Hitachi, Ltd.

Inventor： Sadahiro SUGIMOTO ,  Akira YAMAMOTO ,  Kazuei HIRONAKA

IPC: G06F12/0864 ,  G06F11/10 ,  G06F12/0804 ,  G06F12/0868 ,  G06F12/0871 ,  G06F12/16 ,  G06F3/06

CPC classification number: G06F12/0864 ,  G06F3/06 ,  G06F11/1096 ,  G06F12/0804 ,  G06F12/0868 ,  G06F12/0871 ,  G06F12/16 ,  G06F2212/1032 ,  G06F2212/1044 ,  G06F2212/222 ,  G06F2212/262 ,  G06F2212/283 ,  G06F2212/312 ,  G06F2212/401

Abstract: The storage device of the present invention provides a decompression VOL having no corresponding relationship (mapping) with a final storage media to a superior device, and receives accesses from the superior device to the decompression VOL. Then, data written into the decompression VOL is compressed on-line in a cache memory, and the compressed data is mapped to a compression VOL which is a volume mapped to a final storage media. At the same time, by maintaining and managing a mapping information between an area in the decompression VOL where data has been written and a location in the compression VOL to which compressed data of the relevant data is mapped, when a read request is received from a superior device regarding the decompression VOL, the storage device converts a location information in the decompression VOL designated by the read request to a location information of the final storage media.