A memory system includes a volatile first storing unit, a nonvolatile second storing unit, and a controller. The controller stores management information of data stored in the second storing unit during a startup operation into the first storing unit and performs data management while updating the management information. The management information in a latest state stored into the first storing unit is also stored in the second storing unit. The management information includes a pre-log before and after change generated before a change occurs in the management information and a post-log, which is generated after the change occurs in the management information, concerning the change in the management information. The pre-log and the post-log are stored in the same areas of different blocks.