| 摘要 |
PROBLEM TO BE SOLVED: To prevent a data from being deleted by unexpected interruption of an electric power source or a reset, and realize data writing processing of high speed. SOLUTION: When abnormality is detected in the power source supplied to a memory of a protection object, control for the memory is separated from a CPU before the memory of the protection object is affected and a supply of the power source is switched to an auxiliary electric power source. After the abnormality of the power source is eliminated, the switching is ended, the control for the memory is returned to the CPU to return the supply of the power source to the normal power source, completion of recording for the data is informed to a client when the data transmitted from the client is recorded in the memory of the protection object, whether the last ending is an abnormal ending or a normal ending is confirmed in start-up, the memory of the protection object is restored when the last ending is the abnormal ending after memories other than the memory of the protection object are initialization-processed for the start-up, and the initialization processing for the start-up is conducted for all the memories after the memory of the protection object is restored, when it is the normal ending. |
