Memory systems, memory controllers, operating methods, and storage medium

A memory controller, comprising:

• a controller memory device configured to store control instructions;
• and
• a controller processor coupled to the controller memory device and configured to execute the control instructions to perform processing comprising:
• sending a first program operation command comprising first data and a first address to a memory device, wherein the first data is data to be stored to the memory device based on a first program operation and a second program operation, and the first address corresponds to a first memory cell;
• and
• in response to a power outage, sending a third program operation command comprising the first data and a second address to the memory device in a case that execution of the first program operation has been completed, wherein the second address corresponds to a second memory cell, such that the memory device generates level indicator data based on the first data, and performs a third program operation on the second memory cell to store the level indicator data.

A memory device, comprising:

• a memory cell array;
• and
• a peripheral circuit coupled to the memory cell array and configured to:
• receive a first program operation command comprising first data and a first address from a memory controller, wherein the first data is data to be stored to the memory device based on a first program operation and a second program operation, and the first address corresponds to a first memory cell;
• perform the first program operation on the first memory cell to store the first data;
• in response to a power outage, receive a third program operation command comprising the first data and a second address from the memory controller in a case that execution of the first program operation has been completed, wherein the second address corresponds to a second memory cell;
• generate level indicator data based on the first data;
• and
• perform a third program operation on the second memory cell of the memory device to store the level indicator data.