Apparatus and method for orienting a head over a disc within a multi-disc
servo-track writer preferably uses two gas bearings, an adaptor plate, and an actuator
assembly including an E-block and arm/head assembly. Rotation of the E-block, and
hence actuator arm/head assembly, can be controlled by the movement of a rotational
gas bearing, which is rotated by a motor. The gas bearing provides for reduced
friction and, as a result, decreased eccentricity of the head as compared to related
art configurations. A translational gas bearing can be used for laterally positioning
the actuator assembly for servo track recording.
