OK6410一键烧写linux系统时出现了问题，求指教！谢谢！

错误如下：
5242880 bytes written :ok
unable to use mmc 0:1 for fatload
NAND write :device 0 offset 0x1e00000 ,size 0x7e200000
Input block length is not page aligned
Data did not fit into device ,due to bad blocks
   2116026368 bytes written ERROR.
我按照手册已将nandflash擦除过了，不知道为什么，求解答，谢谢！ :)