1. A servo system comprising: a first interpolator operable to interpolate first equalized data to yield a plurality of first interpolated signals at different phases; a second interpolator operable to interpolate second equalized data to yield a plurality of second interpolated signals at different phases; a first scaling circuit operable to scale the plurality of first interpolated signals by a first adaptive scaling factor to yield a plurality of first scaled signals; a second scaling circuit operable to scale the plurality of second interpolated signals by a second adaptive scaling factor to yield a plurality of second scaled signals; a signal combining circuit operable to combine the plurality of first scaled signals and the plurality of second scaled signals to yield a plurality of combined signals; a phase tracking circuit operable to select among the plurality of combined signals to yield a combined servo data signal; and a scaling factor adaptation circuit operable to control the first adaptive scaling factor and the second adaptive scaling factor.