Data storage device and method for processing error correction code thereof

A method for processing an error correction code of a data storage device, comprising the steps of:

• dividing data to be encoded into a plurality of data groups according to an address of a storage block configured to store the data to be encoded;
• preliminarily encoding the plurality of data groups and generating a plurality of parity data groups corresponding to the plurality of data groups, respectively;
• and
• secondarily encoding the plurality of data groups and the plurality of parity data groups and generating final parity data.

A computer system including a data storage device and a central processing unit, the data storage device comprising:

• a data storage medium;
• and
• an error correction code unit configured to process an error correction code for data to be stored in the data storage medium,
• wherein the error correction code unit comprises:
• a storage block configured to store the data to be stored in the data storage medium;
• and
• an encoder configured to divide the data stored in the storage block into a plurality of data groups according to an address of the storage block, to encode the plurality of data groups, to encode a plurality of parity data groups that are generated by encoding the plurality of data groups, and to generate final parity data.