Methods for detecting contact between a read-write head and the accessed disk surface in a hard disk drive

摘要: Determining a contact condition between read-write head and accessed disk surface inside hard drive, where micro-actuator assembly mechanically couples to slider electrically interacts through signal path. Signal path sensed, creating sensed feedback signal, used determine condition, which indicates when is, or is not, in with surface. Means for implementing this process. Contact product of The process may respond altering flying height. Process be implemented as operations embedded control system and/or servo controller. Method predictive failure analysis using the estimate performance parameter create degradation warning. Manufacture collecting partly reliability form Mean Time Failure. Manufacturing further include screening drive based upon estimate.