Information recording medium and recording/reproducing apparatus

A recording/reproducing apparatus comprising:

• an information recording medium wherein a data track pattern and a servo pattern are formed at least on one side of a substrate by concave/convex patterns including a plurality of convex portions, said concave/convex patterns having concave portions each having a non-magnetic material embedded therein, and wherein an A concave/convex pattern forming said servo pattern comprises a plurality of servo convex portions formed in a manner associated with servo data, at least part of said plurality of servo convex portions being formed by a B concave/convex pattern having a plurality of non-servo convex portions;
• a magnetic head for obtaining a signal recorded on said information recording medium;
• a signal-extracting section for extracting a signal component corresponding to said A concave/convex pattern while eliminating or attenuating a signal component corresponding to said B concave/convex pattern from the signal obtained by said magnetic head;
• and
• a control section for performing servo control according to servo data based on the signal component extracted by said signal-extracting section.