Data processing method and apparatus

The present invention discloses a data processing method using the information stored in the block storage unit, the first and second memory includes a plurality of block units for the data of the data memory and for storing a plurality of block numbers II, each block, the first and second zones each storing a number of the plurality of block numbers assigned to the data area, a second block number, and the newness information stored contents, comprising the steps of: a plurality of block data or the updated data is written in the area, corresponding to the first block and a second region wherein the second region of block number, based on the newness information of the selected first and second regions wherein a area, a number of other regions in the first and in the second region, has been stored in the write step writing the updated data block numbers of the other regions in the first and the second zone a second block number, the block number of the block storing the original data is written; erasing the first and second block number and the newness information in a region where the first and second zone.