| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a setting method of a data storage system capable of further reducing defective bit incidence rate seen from an external interface. <P>SOLUTION: The setting method of data storage system includes: a non-spare area (1n) having a plurality of memory cell blocks and including pages connected to some of the memory cell blocks; a spare area (1s) having a plurality of spare memory cell blocks in which data is preliminarily aligned to a certain value and including pages connected to some of the spare memory cell blocks; and determination circuits (5, 6, 100) which detects at a data error of at least two bits when the data is read from the page in the non-spare area (1n), and determines the number of error bits in the read page by each read page. When a determination result by the determination circuit (100) is equal to or more than two bits, error correction of the content of the read page is performed, and the content of the read page is written in the page in the spare area (1s). <P>COPYRIGHT: (C)2010,JPO&INPIT |
