Memory system, memory controller, and operation method

Embodiments of the present disclosure relate to a memory system, a memory controller, and an operation method. The present disclosure may divide user data and map data corresponding to the user data into data segments, may input the data segments in N virtual die queues, and may program the same in a memory device, wherein a user data segment input in the virtual die queue is programmed according to two program schemes, thereby quickly programming the user data and the map data in the memory device and quickly updating the map data in a map cache.