A technology in which timing or positioning signals are located on a dedicated disk containing no user data. These signals provide the information the actuator needs to fine-tune the position of the read/write heads.

A type of technology where timing or positioning signals are located on dedicated disk containing no user data. The information that the actuator needs in order to fine-tune the position of the read/write heads are provided by these signals.

a design in which the servo information is written continuously throughout the entire track, rather than just one time per track or at the beginning of each sector