1. A method comprising: mapping a first type of erase block (EB), which includes a plurality of pointers, onto one of first physical EBs, of a plurality of physical EBs in a memory; mapping each of second type of EBs and third type of EBs onto at least one of the first physical EBs and second physical EBs of the plurality of 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; when the memory is started up, locating the first type of EB through scanning the first physical EBs and without scanning the second physical EBs; and reclaiming the first type of EB using one of a fourth type of EBs, wherein the one of the fourth type of EBs is within the first physical EBs.