| 摘要 |
PROBLEM TO BE SOLVED: To provide a system for storing data with high reliability for a long time. SOLUTION: A file for writing can be divided into one or more partitions. Each of such input partitions is discriminated by a hash sign and group ID. A certain number of the same partition can be secured by forming a copy of the input partition. When accessing the file, alternation of each of partitions to be read out can be checked. The altered read-out partition is substituted with a substitute partition, which is already checked, and the substitute partition results from the copy or other file. COPYRIGHT: (C)2005,JPO&NCIPI |
