Abstract: A data management system and method use link information stored with a plurality of data segments. The data management system includes: a nonvolatile semiconductor storage section including a plurality of blocks; a storage control section; a data management system control section for processing data to be stored in the nonvolatile semiconductor storage section; and a data management system memory section for storing management data. The data management system control section performs data management by dividing the data into data segments in units of a sector which is a logical unit for data management; storing data link information which indicates the ordinal relationship of the data segments, together with the data segments, in the nonvolatile semiconductor storage section; and storing, as link information in each sector, information about immediately-previous and immediately-subsequent data storage sites.

Abstract: A file system includes at least one non-volatile semiconductor memory device, the at least one non-volatile semiconductor memory device including a plurality of erasure blocks, each erasure block including a plurality of sectors. The file system includes: a file system memory section for storing block state information for each erasure block, the block state information representing one of a plurality of block states, and for storing sector state information for each sector, the sector state information representing one of a plurality of sector states; and a file system control section for, when accessing the at least one non-volatile semiconductor memory device, guaranteeing integrity of data already stored in the at least one non-volatile semiconductor memory device based on the block state information and on the sector state information in the file system memory section.

Abstract: A data management system includes: a nonvolatile semiconductor storage section including a plurality of blocks capable of storing data; a storage control section for controlling a storage operation of the nonvolatile semiconductor storage section; a data management system control section for processing data to be stored in the nonvolatile semiconductor storage section; and a data management system memory section for storing management data which is referred to by the data management system control section, wherein the data management system control section performs data management by: dividing the data into data segments by units of a sector which is a logical unit for data management; storing data link information which indicates the ordinal relationship of the data segments, together with the data segments, in the nonvolatile semiconductor storage section via the storage control section; and storing, as link information in each sector, information about immediately-previous and immediately-subsequent data s