Operating method, memory controller, and memory system

Abstract

The present disclosure is directed to an operating method of a memory controller, a memory controller, a memory system, and an electronic device. Herein, the operating method can include determining a backup region to be used in an idle state from a memory array, when detecting that remaining capacity of a currently used backup region for storing redundancy parity data in the memory array is less than a required capacity of redundancy parity data to be written, determining the quantity of all backup regions for storing redundancy parity data including the backup region to be used in the memory array, deciding whether the quantity is larger than a preset threshold, and erasing backup regions having stored redundancy parity data in the memory array when the quantity is larger than the preset threshold.