| http://www.w3.org/ns/prov#value | - The step of rewriting data includes: counting a number of turns of retry operations of respective sectors while reading data in units of blocks, wherein a size of a block is greater than the sector, from the sub-area; and rewriting data in the block if there is a sector of which a counted number of turns of retry operations is greater than a limited number of turns of retry operations.
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