A nonvolatile memory may include a plurality of blocks as a unit for performing writing and erasing of data which is stored in the respective blocks. The block may include a write data area in which data is written and stored, a correlative code area in which a correlative code indicating a correlation between the data which are written in the respective write data areas of the respective blocks is stored, and an inspection data area in which inspection data required in inspection is stored in the respective blocks for inspecting the validity of the data.