公开(公告)号：US20150324418A1

公开(公告)日：2015-11-12

申请号：US14651688

申请日：2013-01-17

Applicant: HITACHI, LTD.

Inventor： Ryosuke TATSUMI ,  Tadato NISHINA ,  Norio SHIMOZONO

IPC: G06F17/30

CPC classification number: G06F17/30371 ,  G06F3/0608 ,  G06F3/0647 ,  G06F3/067 ,  G06F17/30368 ,  G06F17/30876

Abstract: As a method for migrating data of a volume adopting a snapshot function to a new storage system, in order to perform migration without depending on a method for compressing snapshot data of a migration source storage system, and without stopping transmission and reception of data between the host computer and the storage system, at first, after migrating data of a volume being the source of snapshot (PVOL), migration is performed sequentially from newer generations. At this time, migration target data of each SVOL is all the data within the migration source storage system. The SVOL data copied to a migration destination storage is compared with one-generation-newer SVOL data within the migration destination storage system, and based on the comparison result, a difference management information is created. If there is difference, a VOL allocation management table is updated, and difference data is stored in the area allocated within the pool.

Abstract translation: 作为将采用快照功能的卷的数据迁移到新的存储系统的方法，为了执行迁移而不依赖于用于压缩迁移源存储系统的快照数据的方法，并且不停止在 主机和存储系统，首先在迁移作为快照源（PVOL）的卷的数据之后，从较新的世代顺序执行迁移。 此时，每个SVOL的迁移目标数据是迁移源存储系统中的所有数据。 将复制到迁移目的地存储器的SVOL数据与迁移目的地存储系统中的一代更新的SVOL数据进行比较，并且基于比较结果，创建差异管理信息。 如果存在差异，则更新VOL分配管理表，并将差数据存储在池内分配的区域中。

公开(公告)号：US20210173563A1

公开(公告)日：2021-06-10

申请号：US17001974

申请日：2020-08-25

Applicant: Hitachi, Ltd.

Inventor： Yusuke YAMAGA ,  Tomohiro KAWAGUCHI ,  Akira DEGUCHI ,  Takaki MATSUSHITA ,  Tadato NISHINA

IPC: G06F3/06 ,  G06F12/10

Abstract: In a storage system having a controller constructing a provision volume provided to a server system and an addition volume in which data to be stored in the provision volume is added and stored, when a provision volume copying instruction is received, the controller inserts a start marker indicating start time point of copying into address change history information and copies address conversion information of a provision volume while receiving update data to a provision volume from the server system, as address conversion information of a copy-destination volume. On the basis of a start marker of address change history information and history information, a change from start to completion of copying of the address conversion information of a copy-destination volume is reset to a state at the start time point of copying.

公开(公告)号：US20170097795A1

公开(公告)日：2017-04-06

申请号：US15127838

申请日：2014-04-07

Applicant: Hitachi, Ltd.

Inventor： Tadato NISHINA ,  Tomohiro YOSHIHARA ,  Hiroaki AKUTSU ,  Junji OGAWA ,  Shunji KAWAMURA

IPC: G06F3/06 ,  G06F12/0802

CPC classification number: G06F3/0659 ,  G06F3/0604 ,  G06F3/0616 ,  G06F3/0653 ,  G06F3/0688 ,  G06F11/1076 ,  G06F12/0246 ,  G06F12/0802 ,  G06F2212/60

Abstract: In a flash storage system, the amount of write to be performed to a flash memory of a flash storage can be reduced without deteriorating the performance of a storage controller and the flash storage. When the storage controller performs collective write of data including intermittent reads to the flash storage, the storage system issues a compare write request to the flash storage. The flash storage having received the compare write request reads a data before update of the written data range from the flash memory, compares the read data with the written data, and writes only the data having a different content to the flash memory.

公开(公告)号：US20210232466A1

公开(公告)日：2021-07-29

申请号：US17006095

申请日：2020-08-28

Applicant: HITACHI, LTD.

Inventor： Takaki MATSUSHITA ,  Tomohiro KAWAGUCHI ,  Tadato NISHINA ,  Yusuke YAMAGA

IPC: G06F11/14 ,  G06F16/25 ,  G06Q10/10

Abstract: A storage system includes a business volume, a controller, and an additional write volume. The controller manages first address conversion information for managing a relationship between addresses of the business volume and the additional write volume, and address conversion history information for managing a relationship between the addresses of the business volume and the additional write volume and a time when the data of the business volume is updated as history information. The controller acquires a snapshot of the business volume at each time the data amount of the address conversion history information reaches a predetermined threshold, and stores a recovery point to the address conversion history information at each time a recovery point set command is received for the business volume. Further, when receiving a restore command, the controller restores the business volume using the acquired snapshot and the recovery point stored in the address conversion history information.

公开(公告)号：US20150355864A1

公开(公告)日：2015-12-10

申请号：US14828912

申请日：2015-08-18

Applicant: Hitachi, Ltd.

Inventor： Tadato NISHINA ,  Hiroaki AKUTSU ,  Kohei TATARA ,  Norio SHIMOZONO

IPC: G06F3/06

CPC classification number: G06F3/0689 ,  G06F3/0604 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0644 ,  G06F3/0658 ,  G06F3/0659 ,  G06F3/0688 ,  G06F2003/0695

Abstract: A storage system includes: a storage device including a recording medium that stores data and a device controller that executes addition processing involving a change of state of the data with respect to the data; and a storage controller that controls input and output of data for the storage device. The storage controller transmits, to the storage device, determination information that can be utilized by the device controller for determining whether or not to execute the addition processing along with input-output processing relating to input-output target data. The device controller controls execution of the addition processing with respect to the input-output target data based on the determination information transmitted from the storage controller.

Abstract translation: 存储系统包括：包括存储数据的记录介质的存储设备和执行涉及数据相对于数据的状态改变的加法处理的设备控制器; 以及存储控制器，其控制用于存储设备的数据的输入和输出。 存储控制器向存储装置发送可由设备控制器利用的用于确定是否执行加法处理以及与输入 - 输出目标数据相关的输入输出处理的确定信息。 设备控制器基于从存储控制器发送的确定信息来控制关于输入 - 输出目标数据的相加处理的执行。