Patterned discrete track magnetic media compatible with the constraints imposed by the use of self-assembly technology are described in which the PES servo portion of each servo sector has at least one offset segment used for the position error signal. During operation, the system receives a reference to the desired element. Rotation of the mounting plate receiving the component relative to the mounting plate fixed to the rack permits the component to be conveniently accessed when servicing is desired, and returned to the region of limited access during normal system operations.