Method of operating host and memory system connected thereto

A method of operating a host communicating with a memory system including a journal area and a data area, the method comprising:

• detecting a sudden power-off of the memory system;
• reading meta journal data and journal data stored in the journal area;
• and
• controlling the memory system to recover a write operation before the sudden power-off, based on the meta journal data and the journal data,
• wherein the journal data includes first page data and second page data, the first page data includes first partial data and first parity data, and the second page data includes second partial data and second parity data, and
• wherein the first parity data is generated based on the first partial data, and the second parity data is generated based on the first partial data and the second partial data.

A method of operating a memory system including a journal area and a data area, the method comprising:

• receiving, from a host, write data and a write command;
• and
• writing journal data generated based on the write data in the journal area,
• wherein the write data includes first to N-th partial data, the journal data includes first to N-th page data, the i-th page data among the first to N-th page data includes the i-th partial data among the first to N-th partial data and i-th parity data among first to N-th parity data, and the i-th parity data is generated based on at least one of the first to (i−1)-th partial data and the i-th partial data, where N is a natural number greater than 1, and i is a natural number greater than or equal to 1 and less than or equal to N.

A system comprising:

• a host;
• and
• a memory system coupled to the host and including a controller, and a memory device coupled to the controller and including a journal area and a data area,
• wherein the controller is configured to control the memory device to:
• write journal data and meta journal data in the journal area;
• read the journal data and the meta journal data from the journal area when a sudden power-off is detected;
• determine whether a parity check of the journal data has passed;
• and
• write the journal data of the journal area to the data area when it is determined that the parity check of the journal data has passed,
• wherein the journal data includes first page data and second page data, the first page data includes first partial data and first parity data, and the second page data includes second partial data and second parity data, and
• wherein the first parity data is generated based on the first partial data, and the second parity data is generated based on the first partial data and the second partial data.