DATA READING PROCESSOR

PURPOSE:To provide a data reading processor which improves the access efficiency in consideration of the block that is pre-read by a pre-reading cache mechanism when the data are read out of such a storage as a magnetic disk that has the pre-reading cache mechanism. CONSTITUTION:In reference to a storage that has a cache mechanism and pre-reads a block to hold it in a cache, a cache data recognizing part 30 stores the pre-reading block information 32 to show the pre-reading block that is decided by the block read last. Then a reading processing part 31 carries out with preference the reading request of the block included in the information 32 among plural blocks when it carries out the reading requests of those blocks to the storage. Then the part 31 carries out the reading requests of the blocks which are not included in the information 32.