| 摘要 |
PROBLEM TO BE SOLVED: To detect writing omission in reading of data even when data in one physical block are updated in updating data in a logical block. SOLUTION: In response to a write request, a reading means 1 reads the existing data and parity data. Then, a parity data generation means 2 generates new parity data. Moreover, a time-series information generation means 3 generates time-series information capable of discriminating a previous write request to the same storage area from this time write request. A time-series information application means 4 applies the generated time-series information to the update data and the parity data. Then, a writing means 5 writes the update data to which time-series information for authentication has been applied and the parity data to which time-series information for comparison has been applied in different storage devices. COPYRIGHT: (C)2010,JPO&INPIT |
