| 摘要 |
PURPOSE:To facilitate the abnormality recovery processing by automatically transmitting data between a master file and a backup file to restore files. CONSTITUTION:If a backup device 4 is accessed because data transmission from a terminal equipment to a master device 3 is abnormal, a code indicating this state is stored in a memory 43 of the backup device 4; and if update data transmission from the master device 3 to the backup device 4 is abnormal, a code indicating this state is stored in a memory 33 of the master device 3. Contents of memories 33 and 43 are read out to discriminate the abnormal position when an abnormality recovery instruction is given from the terminal equipment, and stored contents of a backup file 42 are transferred to and stored in a master file 32 when data transmission from the terminal equipment to the master device 3 is abnormal, and stored contents of the master file 32 are transferred to the backup file 42 when data transmission from the master device 3 to the backup device 4 is abnormal. |
