Servo writing in a disc drive with substantially identical heads having read and write elements in a radial offset position

A method of making a disc drive comprising a disc having a center axis, the method comprising steps of:

• (a) making a first head having a first read element and a first write element;
• (b) making a second head substantially identical with the first head, the second head having a second read element and a second write element;
• (c) supporting the first head with a first actuator arm so that the first read and write elements have respective offset distances R1 and W1 from the center axis so that |R1−W1|>D>0 while the first head is positioned adjacent the disc, where D is equal to a typical servo track width;
• (d) supporting the second head with a second actuator arm so that the second read and write elements have respective offset distances R2 and W2 from the center axis so that |R2−W2|>D>0 while the second head is positioned adjacent the disc;
• and
• (e) during one rotation of the disc, controlling the motion of the first write element with a signal received from the first read element.