| 摘要 |
PURPOSE: To suppress a decrease in the performance and enable short-time restoration even if a fault occurs by making the same alterations of the contents of a backup storage device with the alterations of a storage device according to the alteration contents once a decrease in the quantity of a processed load is detected. CONSTITUTION: An alteration content storage part 108 sequentially records alterations of a hard disk 104 detected by a hard disk operation monitor part 107. Then a load monitor part 109 receives information from a load monitoring function prepared for some operation systems or monitor the operation of a bus, etc., at constant time intervals through hardware. The load state of an information processor is acquired through the monitoring and when the load becomes below a certain load quantity, that is reported to a backup data update part 110, which updates the hard disk 106 in the same way according to the alteration information on the hard disk 104 that is recorded in the alteration content recording part 108 on receiving the information. |
