Flash memory apparatus and storage management method for flash memory

A flash memory storage management method used in a flash memory module having a plurality of first blocks and at least one second block, comprising:

• classifying data to be programmed into a plurality of groups of data;
• respectively executing single-level-cell programing and RAID-like (Redundant Array of Independent Disks-like) XOR (exclusive-OR) error code encoding to generate a corresponding parity check code to program the groups of data and the corresponding parity check code to the plurality of first blocks, a cell of the plurality of first blocks being arranged for storing data of two bits;
• and
• controlling the flash memory module to perform an internal copy operation to program the at least one second block by sequentially reading and writing the groups of data and the corresponding parity check code from the plurality of first blocks to the at least one second block, a cell of the second block being arranged for storing data of 2N bits, N being an integer equal to 2 or greater than 2.

A flash memory controller, comprising:

• a plurality of channels respectively connected to a flash memory module having a plurality of first blocks and at least one second block;
• and
• an error correction code encoding circuit;
• wherein the flash memory controller is configured for classifying data to be programmed into a plurality of groups of data, using the error correction code encoding circuit to respectively execute single-level-cell programing and RAID-like (Redundant Array of Independent Disks-like) XOR (exclusive-OR) error code encoding to generate a corresponding parity check code to program the groups of data and the corresponding parity check code to the plurality of first blocks, a cell of the plurality of first blocks being arranged for storing data of two bits;
• after completing program of the plurality of first blocks, the flash controller controls the flash memory module to perform an internal copy operation to program the at least one second block by sequentially reading and writing the groups of data and the corresponding parity check code from the plurality of first blocks to the at least one second block, a cell of the second block being arranged for storing data of 2N bits, N being an integer equal to 2 or greater than 2.