Fujitsu Corporation

Hirotomo Tokoro

Koji Uchida

Hidenori Yamada

Yoshinari Shinozaki

Takashi Kawada

Shin-ichi Nishizono

A backup apparatus and method which stores backup data into a backup data storage area includes detecting whether to increase a capacity of the backup data storage area, assigning a storage area, within an addition-source area set as a storage area permitted to be additionally assigned as the backup data storage area, when a storage area the capacity of which is to be increased is detected, detecting whether to increase the capacity of the addition-source area, and setting the addition-source area in a free storage area as the backup data storage area when detecting that the capacity of the addition-source area is to be increased.

Backup apparatus, backup method and computer readable medium having a backup program

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

In a storage device, an information acquisition unit acquires and stores information in an information memory unit. A data acquisition unit acquires data. A deduplication unit divides the acquired data by a smaller division size than that indicated in additional information included in the information stored in the information memory unit, performs deduplication, and stores the resulting data in a data memory unit. The information memory unit stores the information including the additional information that indicates the division size used for dividing data in deduplication of another device.

Storage device, and program and method for controlling storage device

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

Pre-update data is copied from a first storage device onto a second storage device in response to an update instruction to update data on the backup target volume on the first storage device. A copy status of each data on the backup target volume is managed with position information of the data mapped thereto. If bad data is present in the data on the backup target volume, the position information indicating the position of the bad data is searched. In accordance with the copy status managed with the position information mapped thereto, it is determined whether the pre-update data of the bad data is stored on the second storage device.

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Kawasaki, Japan

Hirotomo Tokoro