Abstract:

Bad blocks on NAND Flash based solid state drives cannot be used to store data,thus the need for bad block management.A bad block table is built with one bit for one block,and then a physical block table is converted from logical blocks according to the bad block table with one logical block matching several different physical blocks.The converted physical block table can prevent the upper from using bad blocks and ensure the reliability and safety of data storage.

Key words: solid state drive;structure of NAND Flash;bad block management