1. A method comprising: mapping a first type of erase block (EB)., which includes a plurality of pointers, onto one of a plurality of physical EBs, in a corresponding portion of a memory; and mapping each of second and third types of EBs onto one of the physical EBs that is not mapped to the first type of EB, the second type of EBs storing system management information and the third type of EBs storing user data.