Apparatus and method for processing read command in zoned namespace based on deterioration state of memory device

Abstract

The present technology provides a memory system, including a memory device including a plurality of memory blocks that have been allocated to a plurality of zoned namespaces (ZNSs), and a controller configured to, when a ZNS on which a read command that has been received from a host is to be performed is a target for a background operation in which a data migration occurs, store the read command in a delay queue, calculate a delay time for each of the read commands that have been stored in the delay queue for each preset calculation time cycle, and process the read commands by sequentially outputting the read commands from the delay queue after a delay of the calculated delay time.