NONVOLATILE MEMORY CONTROL DEVICE, NONVOLATILE MEMORY CONTROL METHOD, AND STORAGE DEVICE

According to an embodiment of the present invention is to increase the number of arbitrarily available physical blocks in a nonvolatile memory device. The device comprises a file system control section which analyzes a file allocation table (FAT) to identify an unused logical block, a logical/physical block address conversion table management section which uses a table of a logical/physical block address conversion table information section to obtain a first physical block corresponding to the unused logical block and releases the association between the first physical block and the unused logical block, and a physical block address information management section which registers the first physical block in a physical block address information section as an arbitrarily available second physical block.