A magnetic recording medium has a RAM region and a ROM region. The RAM region includes a plurality of first tracks each having a first magnetic portion. The first magnetic portions in adjacent tracks are separated from each other. The ROM region includes a plurality of second tracks each having a second magnetic portion. A width of the second magnetic portions in a direction perpendicular to a track direction of the first tracks is larger than that of the first magnetic portions in the perpendicular direction.

 
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