| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonvolatile memory device capable of improving the capability to restore data using parity data. <P>SOLUTION: A nonvolatile semiconductor memory device comprises a RAID controller 11 which writes, when writing, a plurality of divided data items obtained by dividing target data, and parity data generated from the divided data items to each block of a plurality of non-defective memory mats in a distributive manner by referring to a bad block table 12, reads, when reading data, a plurality of divided data items and parity data that correspond to specified data from each block of the plurality of memory mats, restores, when an error has occurred, data of a memory mat where the error has occurred by using data of another memory mat and stores the restored data in another block of the same memory mat as the one where the error has occurred, and stores data indicating a block where the error has occurred, in the bad block table. <P>COPYRIGHT: (C)2013,JPO&INPIT |
