Method and apparatus for detecting shock-resistance performance

摘要

A method for detecting a shock resistance performance of a magnetic head support member in a magnetic disk drive apparatus includes a step of loading a magnetic head supported by the magnetic head support member above a magnetic disk on which servo information have been preliminarily recorded, a step of measuring off-track positions of the magnetic head and reproduced outputs OUT_NOIM of the magnetic head at the respective off-track positions when no shock is applied, a step of storing the measured off-track positions and the measured reproduced outputs OUT_NOIM at the respective off-track positions, a step of measuring off-track positions of the magnetic head and reproduced outputs OUT_IM of the magnetic head when a shock is applied, and a step of obtaining a change in flying height of the magnetic head from the measured reproduced output OUT_IM of the magnetic head when the shock is applied and from the stored reproduced output OUT_NOIM of the magnetic head when no shock is applied depending upon the measured off-track position of the magnetic head when the shock is applied.