A data storage apparatus may include a storage and a controller. The storage includes a plurality of planes each composed of a plurality of memory blocks, and is divided into a first region and a second region. An original of system data and a copy of the system data are stored in the first region. The controller is configured to perform a relief operation of moving the copy of the system data stored in a source memory block of the first region to a victim plane and switching the source memory block to a region replaceable with the second region.