STORAGE APPARATUS USING NON VOLATILE MEMORY AS CACHE AND METHOD FOR OPERATING THE SAME

摘要

A storage device using a non-volatile memory as a cache and management method thereof are provided to safely recover data after sudden power-off by dividing an area of the non-volatile memory as a fixed and unfixed area according to fixation of the data, and managing the areas. The storage device includes a main storage medium(110), the non-volatile memory(120) used as a cache of the main storage medium and including the fixed/unfixed area, and a block manager(130) managing blocks assigned to the non-volatile memory. The block manger manages the area of the non-volatile memory by converting the non-volatile memory into a circular structure. Two points for dividing the fixed and unfixed area are set in the circular structure. The two points is a point assigning the blocks in the fixed and unfixed area, and the last point assigning the blocks.