A virtualized system includes a nonvolatile memory device, a processing circuitry configured to provide a virtualization environment, implement a plurality of virtual units and implement a virtual unit manager. The virtual units operate independently of each other in the virtualization environment and perform a flash translation layer operation inside the virtual units. The flash translation layer operation includes converting a logical block address associated with a storage access operation of the nonvolatile memory device to a physical block address of the nonvolatile memory device. The virtual unit manager controls the virtual units in the virtualization environment.