Method and system to perform urgency level garbage collection based on write history of memory blocks

摘要

A memory system may include: a memory device including a plurality of memory blocks; and a controller configured to control the memory device, wherein the controller comprises: a block level manager configured to determine a level for each of the plurality of memory blocks based on write history of writing data to the memory device, and manage a cold block based on the level; and a garbage collection manager configured to determine a garbage collection urgent level based on a result of comparing a free block count and a first threshold value, and manage whether to perform a garbage collection operation for the cold block based on the determined garbage collection urgent level.