Controller and operation method thereof

A system comprising:

• a host;
• a memory device including a plurality of memory regions;
• and
• a memory controller configured to:
• receive, from the host, read requests associated with the plurality of memory regions;
• determine a weight value for each memory region proportional to the number of read requests on that memory region, such that a memory region with relatively high number of read requests has a relatively high weight value and a memory region with relatively low number of read requests has a relatively low weight value;
• determine a read count for each memory region based on the number of read requests corresponding to that memory region and a corresponding weight value;
• and
• provide, to the host, map information of a physical address for a select memory region among the plurality of memory regions, the select memory region having a read count greater than a threshold,
• wherein the host is configured to:
• translate a logical address associated with a read operation on the select memory region to the physical address based on the map information;
• and
• transmit, to the controller, a read command and the physical address for the read operation on the select memory region.