| 摘要 |
PURPOSE:To provide the data backup method due to realizable update information at low cost without adding any special storage device to each information processor by holding the backup of data provided at the other information processor from any information processor, which is connected to a network, through the network. CONSTITUTION:A data processor 101, which requires backup, transmits the contents of a local file 117 at a certain time point and the updated contents of the file 117 after that time point through a network 105 to an information processor 102 and stores them in an external storage device 104. In this case, the information processor 101 detects the updated contents by comparing the directory of the file 117 with the information of the directory of backup data held in the information processor 102. At the time of this updating backup processing, processing for additionally writing the updated contents of the local file 117 performed by an application program 115 or the like to an updated information file 111 and a data file 110 is executed as well. |
