| 摘要 |
<P>PROBLEM TO BE SOLVED: To restore a nonvolatile system status in power outage during power restoration after sudden power outage. <P>SOLUTION: A backup unit 110 reads original data from a nonvolatile main memory unit 120 when a write access to the nonvolatile main memory unit 120 is detected, writes the data to the address of the nonvolatile main memory unit 120 after storing backup data in a nonvolatile backup memory 130, a commit unit 140 manages the backup data necessary for restoring the nonvolatile main memory unit 120, and a rollback unit 150 extracts the original data from the backup data stored in the nonvolatile backup memory 130, and stores the extracted original data in the address of the nonvolatile main memory unit 120 in rollback instructions. Then, the nonvolatile system status in the power outage is restored during power restoration after the sudden power outage by using the nonvolatile system status as an object for backup of the backup unit 110. <P>COPYRIGHT: (C)2009,JPO&INPIT |
