Patent ID: 6683744
Filing Date: 2004-01-27
Classification: G11B

Abstract:
A magnetic-disk evaluation apparatus, for evaluating a magnetic disk having a plurality of temporary servo signals, comprising:a spindle motor; said spindle motor operating said magnetic disk at a rotation speed effective to enable an evaluation of said magnetic disk; a rotary positioner supporting a magnetic head about a rotation shaft; said magnetic head operable relative to said spindle motor and said magnetic disk; control means for controlling said rotary positioner and said magnetic head on a basis of said plurality of temporary servo signals and positioning said magnetic head relative to a concentric circle centered on said spindle motor prior to said evaluation of said plurality of temporary servo signals; measurement means for accurately measuring a head displacement of said magnetic head in a seek direction relative said magnetic disk; detection means for detecting a tip displacement of a tip of said magnetic head on a basis of said head displacement in said seek direction; and determination means for determining whether said temporary servo signals are acceptable, on a basis of said tip displacement, effective to allow said magnetic-disk evaluation apparatus to effective and rapidly evaluate said magnetic disk.