| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently collect update information for backing up differential data of a data file.SOLUTION: An information processor is provided with: a first storage device for storing data files; a second storage device; first storage means which, when update of the data files is requested, stores to the second storage device update information including location information showing update locations in the data files and data to be updated so that a plurality of update information is stored in order of update information request in consecutive storage areas of the second storage device; a third storage device; and second storage means which, when a capacity of update information stored to the second storage device is over a set volume, stores the update information stored to the second storage device to an empty area where addresses of the third storage device are stored in order that they are stored to the second storage device.</p> |
