Sharp Kabushiki Kaisha Corporation

Nobuaki Tomori

Katsumi Fukumoto

Kazuhiro Okamoto

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.

Nonvolatile data management system using data segments and link information

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.

Growing community of inventors

Nara, Japan

Nobuaki Tomori