| 摘要 |
PURPOSE:To make it possible to confirm which data recording area is the data recording area in reading by recording address data for discriminating each data recording area in prescribed position of each data recording area. CONSTITUTION:Actual data is recorded in this case in an area Q adjacent to the right of a bar P. The are Q is classified into five areas A, B, C, B', A'. In this case, characteristic address data is recorded in areas A, A'. An auxiliary mark used to correct inclination of a head 4 is recorded in area B, B', and data to be recorded is recorded in the area C. Data groups in areas A and A' are completely the same data and constituted of 7 bits. Data in this area is address data that indicates addresses of each data recording area and data is different for each data recording area. Accordingly, it is possible to recognize which data recording area is the data recording area being read at present by reading the address data by the head 4.
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