MEMORY SYSTEM

摘要

A memory system includes a DRAM (20) that performs writing and readout in a unit equal to or smaller than a cluster, a NAND memory (10) that performs writing and readout in a page unit, and a management table group in which management information including storage locations of data stored in the DRAM (20) and the NAND memory (10) is stored. When a readout request is received from the outside, a data managing unit (120) notifies, when an unwritten logical address area is present in a storage area of the NAND memory to which a logical address area requested to be read out is mapped, fixed data stored in the DRAM (20) to the outside in association with the logical address area.