A data processing system may include a host and a memory system, the memory system may include a volatile recovery selection register and a nonvolatile memory device, wherein the memory system checks, after being reset, a value of the recovery selection register and determines whether to perform a recovery operation on the nonvolatile memory device, and when a reset is requested from the host, the memory system sets the value of the recovery selection register and resets the nonvolatile memory device, and the host may read set first data from the memory system through a first booting operation that starts during a power-on operation, may request a reset to the memory system, and may read set second data form the memory system through a second booting operation that starts after the reset of the memory system.