Patent ID: 8539142
Filing Date: 2013-09-17
Classification: G06F

Abstract:
1. A storage system, comprising: a nonvolatile semiconductor storage medium; a storage part for storing logical-physical translation information, which is information denoting the corresponding relationship between a logical address and a physical storage area of the nonvolatile semiconductor storage medium; and a media controller, which is a controller coupled to the storage part and the nonvolatile semiconductor storage medium, wherein the logical-physical translation information includes: (A) information denoting corresponding relationships between multiple logical pages and multiple logical chunks forming a logical address space of the nonvolatile semiconductor storage medium; and (B) information denoting corresponding relationships between the multiple logical chunks and multiple physical storage areas, each logical page is a logical storage area conforming to a logical address range, each logical chunk is allocated to two or more logical pages of the multiple logical pages, two or more physical storage areas of the multiple physical storage areas are allocated to each logical chunk, the media controller is configured so as to identify, based on the logical-physical translation information, a physical storage area allocated to a logical chunk to which a logical page to which a data write-destination logical address belongs is allocated, and to write the data to this identified physical storage area, and the media controller adjusts the number of physical storage areas to be allocated with respect to each logical chunk, wherein pages of different logical chunks are allocated to adjacent logical pages, and physical storage areas of different physical resources are allocated to pages of different logical chunks.