Patent ID: 8832527

Claim:
A method of storing system data for a memory storage apparatus, wherein the memory storage apparatus comprises a rewritable non-volatile memory module, the rewritable non-volatile memory module comprises a plurality of physical erase units, each of the physical erase units comprises a plurality of physical program units, and a first physical erase unit among the physical erase units stores system data, the method comprising: determining whether an unused storage space of the first physical erase unit is sufficient to store updated system data; and if the unused storage space of the first physical erase unit is insufficient to store the updated system data, selecting a second physical erase unit from the physical erase units, writing the updated system data to at least one first physical program unit among the plurality of physical program units in the second physical erase unit and writing dummy data to a second physical program unit among the plurality of physical program units in the second physical erase unit.