Method for static wear leveling in non-violate storage device

A method for static wear leveling in non-violate storage device, comprising the steps of:

• step SA01:
• recording occupied count and erasure count of each physical block in the non-violate storage device;
• step SA02:
• judging if a controller issues an erase command to the non-violate storage device;
• step SA03:
• incrementing the erasure count of an erasure block by one while data is erased from the erasure block according to the erase command;
• step SA04:
• incrementing the occupied count of an occupied block by one while data is written to the occupied block;
• step SA05:
• triggering wear leveling while the difference between the highest occupied count of a non-occupied block and the lowest erasure count of the occupied block exceeds a predetermined value;
• step SA06:
• choosing a block having higher occupied count and lower erasure count to move;
• and
• step SA07:
• moving data stored in the block chosen in step SA06.