| 摘要 |
PROBLEM TO BE SOLVED: To reduce a capacity of a saving area.SOLUTION: A copy controller includes: an update portion information storage unit 121 storing update portion information 13 indicating an update portion if data update occurs in a copy source area 12 while copying of data from the copy source area 12 to a copy destination area stops; and a copy processing unit 11 exerting a control to copy the data in the copy source area 12 corresponding to the update portion to the copy destination area 22 on the basis of the update portion information 13. In the update portion information 13, the copy source area 12 is divided into predetermined areas and update count information on the number of updates performed on the copy source area 12 is stored in each of the predetermined areas. The copy processing unit 11 suppresses the copying of data in the area for which the update count is not less than a predetermined number. |
