Memory system and control method

A memory system, comprising:

• a non-volatile memory including a plurality of blocks, each block including a plurality of pages;
• a memory interface that executes writing and reading on the non-volatile memory;
• a first encoder that encodes a plurality of first data frames written in a first block among the plurality of blocks in an inter-frame direction and generates first parity data;
• a second encoder that divides the first parity data into a plurality of parity frames, encodes the plurality of parity frames in an inter-frame direction, and generates second parity data;
• and
• a third encoder that generates a plurality of pieces of first frame data by concatenating at least a part of the first parity data and/or at least a part of the second parity data with each of a plurality of second data frames written in a second block different from the first block among the plurality of blocks, encodes each of the plurality of pieces of first frame data in an intra-frame direction, and generates a plurality of pieces of third parity data,
• wherein the memory interface writes a plurality of pieces of second frame data obtained by concatenating each of the plurality of pieces of first frame data and each of the plurality of pieces of third parity data in the plurality of pages in the same block in the non-volatile memory one by one.

A control method of a memory system including a non-volatile memory including a plurality of blocks and a memory interface that executes writing and reading on the non-volatile memory, each block including a plurality of pages, the control method comprising:

• encoding a plurality of data frames written in the same block among the plurality of blocks in an inter-frame direction and generating first parity data;
• dividing the first parity data into a plurality of parity frames;
• encoding the plurality of parity frames in an inter-frame direction and generating second parity data;
• generating a plurality of pieces of first frame data by concatenating at least a part of the first parity data and/or at least a part of the second parity data with each of the plurality of data frames;
• and
• encoding each of the plurality of pieces of first frame data in an intra-frame direction and generating a plurality of pieces of third parity data,
• wherein the memory interface writes a plurality of pieces of second frame data obtained by concatenating each of the plurality of pieces of first frame data and each of the plurality of pieces of third parity data in the plurality of pages in the same block in the non-volatile memory one by one.

A control method of a memory system including a non-volatile memory including a plurality of blocks and a memory interface that executes writing and reading on the non-volatile memory, each block including a plurality of pages, the control method comprising:

• encoding a plurality of first data frames written in a first block among the plurality of blocks in an inter-frame direction and generating first parity data;
• dividing the first parity data into a plurality of parity frames;
• encoding the plurality of parity frames in an inter-frame direction and generating second parity data;
• generating a plurality of pieces of first frame data by concatenating at least a part of the first parity data and/or at least a part of the second parity data with each of a plurality of second data frames written in a second block different from the first block among the plurality of blocks;
• and
• encoding each of the plurality of pieces of first frame data in an intra-frame direction and generating a plurality of pieces of third parity data,
• wherein the memory interface writes a plurality of pieces of second frame data obtained by concatenating each of the plurality of pieces of first frame data and each of the plurality of pieces of third parity data in the plurality of pages in the same block in the non-volatile memory one by one.