| 摘要 |
PURPOSE: A method for assigning an invalidation chances about data pages and a NAND flash memory system therefor are provided to supply chances for invalidating data to data pages, thereby increasing performance. CONSTITUTION: A flash memory(140) includes a data block which stores data, a log block which temporarily stores the data, a free block, and an isolation block which temporarily stores data to be merged. An FTL(File Translation Layer)(120) selects a sacrifice log block when a garbage collection running condition is generated. The FTL copies a data page which does not receive an invalidation chance in the free block and copies a data page which receives an invalidation chance in the isolation block. |
