DATA STORAGE DEVICE, DATA STORAGE METHOD, AND DATA STORAGE PROGRAM

摘要

The storing unit (52) stores data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit (30), each block having an upper limit in number of data rewrites. A registering unit (54), upon detection of a protection trigger for giving an instruction to protect data, registers, in data stored in a block by the storing unit, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger. A managing unit (55) manages, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.