| http://www.w3.org/ns/prov#value | - In this state, if the header section 11 which lies in the head sector of the ECC block is reproduced (ST4), the controller 22 determines whether or not the sector is a defective sector by detecting whether or not the sector is correctly read according to whether or not two or more of the four physical sector numbers of the header section 11 are reproduced (ST5).
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