Patent ID: 8559126
Filing Date: 2013-10-15
Classification: G11B

Abstract:
1. A method for positioning a magnetic-recording head, said method comprising: correcting amplitude of each burst signal of a plurality of burst signals read out with said magnetic-recording head from each respective burst pattern of a plurality of burst patterns; computing a deviation of said magnetic-recording head from a track based on corrected amplitudes of said plurality of burst signals; and positioning said magnetic-recording head on said track based on said deviation of said magnetic-recording head, wherein said amplitude of each burst signal of said plurality of burst signals is corrected based on misalignment information that is obtained before said deviation of said magnetic-recording head is computed and related to said misalignment of each of said burst patterns perpendicular to said scanning direction and wherein said amplitude of each of said burst signals is corrected based on amplitude-characteristic information related to said relationship between a position in said burst patterns and said amplitudes of said burst signals and wherein said amplitude-characteristic information comprises said amplitude gradients of said burst signals read out from at least two positions interposing said position where said burst signals are read out with said magnetic-recording head in said burst patterns.