Memory controller, system, operating method, and electronic device with improved over provisioning (op)

Abstract

Disclosed in the present application are an operating method for a memory controller, a memory controller, a system, and an electronic device. The operating method can include, when detecting that remaining capacity of a used backup area in the memory is less than capacity required for redundancy check data to be written, determining a backup area to be used from the memory, determining valid redundancy check data belonging to garbage collection in the used backup area, and backing up the valid redundancy check data into the backup area to be used, and erasing the used backup area.