A method for maintaining time data based on solid-state memory increases nand

The present invention discloses a method for improving the holding time based on the solid-state NAND memory data is divided into bit status table update period T1 and inspection time period T2, the bit map table T1 query, if the state of the corresponding bit is 0 is updated 1, or maintain the original state, and so on, until a time T1 reaches the set threshold; read and the ECC error detection and inspection bitmap table T2 is cleared. The invention not only ensures the integrity of data inspection, but also do the minimum to bring additional operations to ensure the safety of all user data, again at a lower cost and the cost of implementation.