1. A storage device comprising: a data storage medium; a microactuator configured to move one or more read/write heads relative to the data storage medium; and a servo controller to apply a direct current (DC) voltage to the microactuator to drive a pair of heads from the one or more read/write heads out of phase, and to repetitively adjust the DC voltage and apply the adjusted DC voltage until adjustments to the DC voltage cover an entire driving range of the microactuator.