| 摘要 |
In a back-up system, during normal operation, a first data is stored in a main storage unit and a buffer storage unit and also transferred to an auxiliary storage unit. During a back-up operation, the auxiliary storage unit is no longer updated and the first data stored in the auxiliary storage unit is transferred to a back-up storage unit. Also during the back-up operation, a second data is stored in the main storage unit and the buffer storage unit. Then, after the back-up operation has been performed, the second data is transferred from the buffer storage unit to the auxiliary storage unit.
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