| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a memory system for increasing the reliability of management information by eliminating such possibility that a log is destroyed after the recovery of a power source from its abnormal interruption or the like. <P>SOLUTION: A management information restoring part 155 judges whether a short break has occurred referring to a pre-log 220A or a post-log 220B in a NAND memory 12. The management information restoring part judges that a short break has occurred when the pre-log 220A or the post-log 220B is present. In that case, the management information restoring part judges the timing of occurrence of the short break, and, after selecting a pre-log 220A or a post-log 220B used for restoration, performs the restoration of the management information reflecting these logs on a snapshot 210. Thereafter, the management information restoring part applies recovery processing to all write-once blocks in an NAND memory 212, takes the snapshot 210 again, and opens the snapshot and the logs in the past. <P>COPYRIGHT: (C)2009,JPO&INPIT |
