Considering that single NandFlash has low speed

small capacity and existing invalid block

the reliability storage solutions of high speed and high capacity image recorder based on NandFlash is proposed. The structure and characteristics of NandFlash is analyzed .Then by separating written invalid block from non written invalid block

the classified data matching and detection mechanism based on CAM is proposed to raise invalid block information matching speed. The SRAM array backup is adopted to prevent data writing error. Based on this

when invalid block is occurring in multiple pipelining grade during writing，dual pipelining mechanism which is based on dual bus structure is proposed to prevent interruption of writing pipelining. The experiment which is based on hardware platform indicates the algorithm can identify the invalid blocks in 5 system clock period. The consistent storage speed is up to 960 Mb/s

consistent read speed up to 1.152Gb/s and erase speed up to 27.3Gb/s.The system storage capacity is up to 80Gbytes.