Storage system, storage device and information storing method

A storage device comprising:

• a storage unit capable of reservation of a storage area;
• and
• a control unit to control said storage unit;
• said control unit functioning as:
• a primary-side reserving unit to reserve a primary-side storage area in said storage unit;
• a request unit to request a secondary-side storage device to reserve a secondary-side storage area serving as copy destination area of the primary-side storage area;
• a checking unit to receive identifying information of the secondary-side storage area reserved by the secondary-side storage device;
• a management storage unit to store the identifying information of the secondary-side storage area in the way of being associated with the primary-side storage area;
• and
• a transfer unit to transfer data stored in the primary-side storage area to the secondary-side storage area.

A storage device comprising:

• a storage unit capable of reservation of a storage area;
• and
• a control unit to control said storage unit;
• said control unit functioning as:
• a request accepting unit to accept a request for reserving the secondary-side storage area serving as the copy destination area of the primary-side storage area from a primary-side storage device;
• a secondary-side reserving unit to reserve the secondary-side storage area in said storage unit in response to the request;
• and
• a report unit to report an identifying information of the reserved secondary-side storage area to said primary-side storage device.

A storage system comprising:

• at least a storage device of a first group;
• and
• a storage device of a second group;
• said storage device of said first group including:
• a first storage unit capable of reservation of a storage area;
• and
• a first control unit to control said storage unit, said first control unit functioning as:
• a primary-side reserving unit to reserve a primary-side storage area in said first storage unit;
• a request unit to request said storage device of said second group to reserve a secondary-side storage area serving as copy destination area of the primary-side storage area;
• a checking unit to receive identifying information of the secondary-side storage area reserved by said storage device of said second group;
• a management storage unit to store the identifying information of the secondary-side storage area in the way of being associated with the primary-side storage area;
• and
• a transfer unit to transfer data stored in the primary-side storage area to the secondary-side storage area;
• said second storage device of said second group including:
• a storage unit capable of reservation of a storage area;
• and
• a second control unit to control said storage unit;
• said second control unit functioning as:
• a request accepting unit to accept a request for reserving the secondary-side storage area serving as the copy destination area of the primary-side storage area from said storage device of said first group;
• a secondary-side reserving unit to reserve the secondary-side storage area in said second storage unit in response to the request;
• and
• a report unit to report the information for identifying the reserved secondary-side storage area to said storage device of said second group.

An information storing method executed by a storage system comprising:

• a primary-side storage device;
• and
• a secondary-side storage device,
• said primary-side storage device including:
• a first storage unit capable of reservation of a storage area;
• and
• a first control unit to control said first storage unit;
• said secondary-side storage device including:
• a second storage unit capable of reservation of a storage area;
• and
• a second control unit to control said storage unit;
• said first control unit executing:
• reserving a primary-side storage area in said first storage unit;
• requesting said secondary-side storage device to reserve a secondary-side storage area serving as copy destination area of the primary-side storage area;
• receiving identifying information of the secondary-side storage area reserved by said secondary-side storage device;
• storing the identifying information of the secondary-side storage area in the way of being associated with the primary-side storage area;
• and
• transferring data stored in the primary-side storage area to the secondary-side storage area;
• said second control unit executing:
• accepting a request for reserving the secondary-side storage area serving as the copy destination area of the primary-side storage area from said primary-side storage device;
• reserving the secondary-side storage area in said second storage unit of the self-device in response to the request;
• and
• reporting the information for identifying the reserved secondary-side storage area to said primary-side storage device.