| http://www.w3.org/ns/prov#value | - In the address converter 100, the count value of the counter 98 is referred to the designated segment area position data supplied from the decoder 93 and the address data is converted to position data comprised of circumferential position data and radial position data associated with the area including the additional area as shown in FIG. 7B, and supplied to a defect start position comparator unit
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