| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for restoring data even if a storage device which erases data in block units is powered OFF during erasure of block data.SOLUTION: A data management device comprises: a rewritable nonvolatile storage device comprising three or more blocks where data is erased in block units; and control means of reading data out of the storage device and writing data to the storage device. The three or more blocks are previously coupled logically and annularly in one direction. Each block has a management part in which management information representing a writing state of a next block of the respective block in the coupling direction of the blocks coupled annularly in the one direction is written, and a data part in which write request data accepted at a write request is written, and the control means writes the write request data to the block (S400-S408) according to specific order as previously set specific data writing order of writing the write request data to the blocks, and the coupling direction.SELECTED DRAWING: Figure 4 |
