A memory system may include: a nonvolatile memory device including a plurality of memory blocks; and a controller for reading data stored in a physical address in response to a read command from a host, the read command including a first logical address, a first physical address corresponding to the first logical address, and a first read count associated with the first physical address, the controller may read first data from a first block corresponding to the first physical address and sends a response to the read command to the host, the response including the first data and updated information relating to the first read count.