The mass capacity memory based on NAND Flash is widely used in space storage fields recently. However

due to a variety of condition constrain and bad blocks can be produced

so the reliability of mass capacity storage can not be assured especially in severe environment.A new design plan is proposed to realize the high reliability mass capacity memory.The core technology are reasonable bad block management

triplication redundancy reading and writing of key data through SRAM

warm standby of Flash arrays and checking of data playback.The experiment result shows that the system data will not be caused to incomplete

and the cost of the whole storage system is lower than the current onboard memory.