STORAGE SYSTEM USING HIGH SPEED STORAGE DIVECE AS CACHE

摘要

PURPOSE: A storage system using high speed storage device providing enough storage space as a cache is provided to use a storage device having fast access speed as a cache and use a storage device having high capacity storage space thereby improving the access speed even providing enough storage space. CONSTITUTION: A first storage unit(150) stores a plurality of contents files including a plurality of blocks and manages the plurality of blocks with a plurality of super blocks having set size. A second storage unit(140) caches at least one super block and manages the super block with a block unit. RAM stores at least one block among the plurality of blocks. The capacity of the first storage unit is bigger than the capacity of the second storage device or access speed of the second storage device is faster than access speed of the first storage device.