Nonvolatile memory system and operating mehtod thereof

Method of operating a nonvolatile memory system according to an embodiment of the present invention comprises a step of migrating data stored in the first area when the first boot to the second area; And comprising: data is reprogrammed to a write the second region, the first boot after the manufacturing the non-volatile memory system is pointing the operation according to the first boot up, re-program the memory cells of the second area the data is written and It refers to an operation for rewriting data to the same memory cells.