Storage device

A memory device includes a non-volatile memory device including a memory cell array, and a memory controller for controlling the non-volatile memory device. The memory cell array includes word lines, memory cells, and word line cutting regions dividing the word lines into memory blocks. The memory controller includes an error correction code (ECC) engine and a memory interface, the ECC engine including an ECC encoder. The ECC encoder performs a first ECC encoding operation on each sub-data unit in the user data to generate parity bits and generate a plurality of ECC sectors; selecting outer cell bits to be stored in the outer cell to constitute an outer ECC sector including the outer cell bits; and performing a second ECC encoding operation on the outer ECC sector to generate an outer parity. The memory interface sends a set of codewords including the ECC sectors and the outer parity bits to the non-volatile memory device. 一种存储设备包括非易失性存储器件和存储控制器，该非易失性存储器件包括存储单元阵列，该存储控制器用于控制非易失性存储器件。存储单元阵列包括字线、存储单元和将字线划分为存储块的字