Flash memory device including address mapping for deduplication, and related methods

The memory device and its operation method is disclosed. Method of operation of the invention, the control unit; And according to the method of operating a data storage device including a flash memory containing blocks of physical pages including a physical sector that stores data, based on the step, de-duplication operation for receiving a write data sector is stored in the flash memory and, determining at least one data sector matching by comparing write data sectors and reference data sectors, the physical sector in the physical page of a block in the flash memory for the reference data sectors corresponding to the said matching data sector storing in the logic of the data sector matched to the corresponding to the reference data sectors comprising the steps of mapping for the physical address to the flash translation layer (FTL) of the control unit, and a physical relates to a data sector matched to the corresponding - for - given water in the flash memory, the logical information - a step of light to the logical information area-to.