Patent ID: 8526134

Claim:
A servo system, comprising: at least one servo sensor for sensing a lateral position of a magnetic head with respect to at least one defined servo track of a longitudinal tape; a fine actuator configured to translate the magnetic head laterally with respect to the longitudinal tape; a coarse actuator configured to translate the fine actuator laterally with respect to the longitudinal tape; and a servo control configured to: sense a first servo sensor of the at least one servo sensor while the longitudinal tape is moved in a first direction; determine position error between the magnetic head and a desired position related to the at least one defined servo track; provide signals to operate the fine actuator to translate the magnetic head laterally in a manner to reduce the determined position error; calculate a first average position of the magnetic head for at least one first run-out cycle while the longitudinal tape is moved in the first direction; calculate a first offset of the magnetic head while the longitudinal tape is moved in the first direction based on a target position and an assumption that the first average position of the magnetic head occurred when the tape was at a top-most position or a bottom-most position of a supply reel; operate the coarse actuator to position the coarse actuator substantially at the target position using the first offset and the first average position; and store the first offset to a memory.