| http://www.w3.org/ns/prov#value | - The present embodiment is an embodiment in which BER is measured by recording and reproducing a random pattern on the disk, whereby the number of elements in the correction table is increased and test recording performed only when BER is higher than a fixed value, and in which there is no unnecessary test recording step for disks whose recording density is low, or for disks whose thermal interfere
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