Patent ID: 7738203

Claim:
A magnetic recording medium comprising: a servo region configured to provide positional read/write head data associated with alignment of the read/write head of record/reproducing device for the magnetic recording medium; a RAM region including a plurality of first tracks having a first magnetic portion, the first magnetic portions in adjacent tracks being physically separated by nonmagnetic portions from each other; and a ROM region including a plurality of second tracks having a second magnetic portion, a width of the second magnetic portions in a direction perpendicular to a track direction of the first tracks being larger than that of the first magnetic portions in the perpendicular direction, the ROM region being initialized by applying a magnetic field so as to align a magnetization direction of the second magnetic portion in a given direction with respect to a direction of the second track; wherein said RAM region and said ROM region are separated from the servo region, wherein a width of the first tracks in the perpendicular direction is equal to that of the second tracks in the perpendicular direction, wherein, in the ROM region, the second magnetic portions are intermittently arranged along the track direction, and wherein, in the ROM region, all the second megnetic portions are magnetized in the same direction.