Fujitsu Corporation

Hidenori Yamada

Shinichi Nishizono

Koji Uchida

Yoshinari Shinozaki

Takashi Kawada

Akihito Kobayashi

Katsuhiko Nagashima

Hirotomo Tokoro

Hideaki Omura

Naruhiro Oogai

Shin-ichi Nishizono

A control unit determines a storage location of copy target data managed by a first controller module, based on configuration information. When a first transmission buffer included in the first controller module is the storage location of the copy target data, the control unit stores the copy target data in the first transmission buffer. When a second transmission buffer different from the first transmission buffer is the storage location of the copy target data, the control unit stores the copy target data in the second transmission buffer via a corresponding second controller module.

Storage control apparatus and storage system

A first control unit of a first control device executes: a synchronous copy process for writing data from a host device into a first storage medium, transmitting the data to a second control device, and replying to the host device; a storage process for storing the data written in the first storage medium into a first region, instructing the second control device on a buffer switch when a predetermined condition is satisfied, and switching a storage destination to a second region; and an asynchronous copy process for transmitting the data in the first region and the second region to a third control device at a time, respectively. A second control unit stores the data transmitted from the first control unit in a second storage medium and a third region, and when the buffer switch is instructed, stores the data in the second storage medium and a fourth region.

Storage system

A storage device includes a memory and a control device. The control device allocates a first storage region out of a plurality of storage regions to a first logical address specified by an external device. The control device stores, in the memory, first information associating the first logical address with a first physical address indicating the first storage region. The control device deletes, upon accepting a request for release of a second storage region indicated by a second physical address associated with a second logical address specified by the external device, second information associating the second logical address with the second physical address from the memory. The control device releases, when copy process of copying first data stored in the second storage region is unexecuted, the second storage region after finishing the copy process.

Storage device and method for controlling storage device

An apparatus including: a first storage for storing first data; second storages for storing the first data; a storage controller for storing the first data stored in the first storage into the second storage; a third storage for saving data including second data; a saving device for reading the data and saving the data in the third storage; a data set output device for outputting the data to a copy destination device; a restoration device for storing the data saved in the third storage into available ones of the second storages; and a suspending device for causing the data set output device to output all of the data stored in the second storage to the copy destination device and then suspending the output of the data by the data set output device to the copy destination device to place the data set output device in a suspend state.

Storage apparatus, controller and storage apparatus control method

A storage system includes a first storage unit, a second storage unit and a controller to receive a write request for updated data to a first storage unit from the host and write the updated data into the first storage area, when the controller determines that there is not a free area in a storage area to be processed in the second storage unit, the controller changes the storage area to be processed to another storage area to be processed and instructs change of a storage area to be processed to another storage system to be connected to the host, and the controller reads the updated data from the first storage unit and transmits the updated data and writing destination information relating to the updated data to another storage system for backup.

Storage system and storage system network

A storage apparatus includes a memory that stores data groups, a rearranging unit that rearranges a transmission group order of the data groups based on each of storage positions in a storage device provided in a copy destination storage apparatus in which the each of data groups is to be stored, and a transmitting unit that transmits the data groups rearranged by the rearranging unit to the copy destination storage apparatus.

Storage apparatus, control method for storage apparatus, and storage system

A save control section included in a storage apparatus continuously performs writeback by which a data group is read out from a plurality of storage sections of the storage apparatus and by which the data group is saved in a data group storage section of the storage apparatus, or staging by which a data group saved in the data group storage section is distributed and stored in the plurality of storage sections according to storage areas of the data group storage section which store a plurality of data groups. An output section of the storage apparatus outputs in block a data group including the data stored in each of the plurality of storage sections. The data group storage section has the storage areas for storing a data group.

Storage apparatus and storage apparatus control method

A storage apparatus includes a storage module, a memory having areas storing data to be copied to the storage device, a saving buffer for temporarily saving the data stored in the areas, a control module for executing receiving a write request including the data to be stored in the storage apparatus, storing the data included in the write request to the storage module and one area, saving the data stored in the one area to the saving buffer when the number of areas which the copying is executed is not less than the threshold value, copying the data stored in the one area to the storage device or writing the saved data stored in the saving buffer to the one area when the number of areas which the copying is executed is less than the threshold value, determining the threshold value in accordance with an amount of the write request.

Storage apparatus and method for storage apparatus

A storage apparatus includes a copy control unit for managing a copy session for copying an copy source data area in at least one of the first to the Mth copy source disk groups to an copy destination data area in a corresponding copy destination disk group, setting a first to an Mth copy session groups, each of the copy session groups including one or more copy sessions from the ith copy source disk group to the ith copy destination disk group as the copy session, and performing repeatedly a selection operation for cyclically selecting a copy session from each of the first to the Mth copy session groups in a predetermined sequence and a control operation for cyclically executing copy processing on a predetermined copy processing unit basis for the M copy sessions selected by the selection operation in a predetermined sequence for a prescribed number of times.

Storage apparatus and storage control apparatus

A system and method of controlling copying including a management table for managing an update target data in a first storage volume and stored locations of before-update data of the update target data in a second storage volume, and relocating data in the second storage volume upon confirming a predetermined range of the first storage volume has been copied into the second storage volume using the management table.

Storage system, copy control method, and copy control unit

A RAID control apparatus and control method. The RAID control apparatus includes disk devices and disk control devices including a cache memory that stores cache data of a logical unit, and control unit, upon the logical units present in different disk devices being concatenated to each other, switching in-charge disk control devices such that a disk control device is in charge of access to the concatenated logical units without writing back the cache data stored in a cache memory of a source disk control device to the disk device.

RAID control apparatus and control method therefor

A backing-up apparatus, upon receiving an instruction to execute backing up, allocates a storage area to store a snapshot to be produced to each time point indicated by the instruction. When the original data is updated after the time point indicated by the instruction, it is checked that the original data corresponding to the place to which the updating has been executed at a time point immediately before the time point indicated by the instruction is stored in the storage area allocated as the storage area to store the latest snapshot produced for the immediately previous time point. When it has been confirmed that the original data is not stored, the original data immediately before the updating corresponding to the place to which the updating has been executed is stored in only the storage area to store the latest snapshot.

Backing-up apparatus, backing-up method, and backing-up program

A cache managing unit creates a list of elements corresponding to each data block arranged based on a priority of writing data blocks to a magnetic disk apparatus, and when a group of elements corresponding to data blocks to be written to the same magnetic disk apparatus exists, provides a link connecting elements at both ends of the group. A write control unit searches, upon selecting a data block for writing, elements belonging to the list in descending order of priority, and if a link is set at an element corresponding to a data block to be written to a magnetic disk that cannot perform a writing, follows the link to search a subsequent element.

Raid apparatus, cache management method, and computer program product

An interdevice communication monitoring unit-calculates a variable timeout time (T&#x2212;T) by subtracting an elapsed time T from a predetermined fixed timeout time Tfor monitoring an intermodule communication to monitor an elapsed time of an intermodule communication. The fixed timeout time Tis a time shorter than a predetermined interface connection check time Tfor monitoring an interface connection with a channel. When the elapsed time T of the intermodule communication exceeds the variable timeout time (T&#x2212;T), the interdevice communication monitoring unit requests a channel to separate the interface connection, and then when an end response is obtained from a control module, requests the channel for an interface reconnection and then transmits an end response.

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Kawasaki, Japan

Hidenori Yamada