Abstract: Embodiments of the present disclosure relate to a method and apparatus for accessing data by receiving a data read request for reading data corresponding to a logical block number; determining a first physical block corresponding to the first logical block number on the disk when a first cache page corresponding to the first logical block number does not exist in a cache; and reading data in the second cache when a second cache corresponding to the second physical block exists in the cache, wherein the content of the second physical block is identical to the content of the first physical block. Some embodiments of the present disclosure may prevent storing mass redundant data, and thereby enhance data reading rate.