US Patent 11182099 Memory system and operating method thereof

A memory system includes a memory group including a plurality of memory devices having two or more different types; and a controller configured to control data input and output for the memory group, wherein the controller includes a scrubbing controller configured to collect health information to which a deterioration degree for each of the plurality of memory devices is reflected and determine a scrubbing interval for each of the plurality of memory devices based on the health information, the scrubbing interval being reduced in proportion to the deterioration degree.