Patent ID: 8332696

Claim:
A defect management method for a storage medium, comprising: performing an initial check to the storage medium, and dividing the storage medium into a plurality of areas, wherein the areas comprise at least one use data area having a plurality of endurance blocks, a management area, and a backup area; applying an endurance value to each of the endurance blocks in the use data area, wherein each of the endurance value represents a damage degree of the applied endurance block; establishing an endurance table in the storage medium, wherein the endurance table records the endurance blocks and the endurance values; dividing the use data area into a plurality of second areas, wherein each of the second areas comprises the endurance blocks having the same endurance value; storing first data into one of the second areas according to an importance of the first data and the endurance values; and performing an erase/write operation to the storage medium according to the endurance table, wherein the endurance values of the endurance blocks are recalculated and the endurance table is updated when the storage medium has been erased/written for predetermined erase/write times, or performing a read operation to the storage medium, wherein the endurance values of the endurance blocks are recalculated and the endurance table is updated when the storage medium has been read for predetermined read times, wherein the endurance values of the endurance blocks are recalculated according to a writing cycle and an ECC (error correction code) correction bit number of each of the endurance blocks.