Continuous-plus embedded data position control method for magnetic disk device.

摘要

A method for use in a magnetic disk drive of the type in which a disk assembly has a dedicated servo surface containing circular tracks of dedicated servo signals (75) and data surfaces containing circular data tracks divided into sectors each of which includes a data field (256) and a servo field (254) containing embedded servo signals, a dedicated servo signal detector for detecting servo signals (75) on said dedicated surface, an embedded signal detector for detecting embedded servo signals (254) on a data surface and a head positioning system for positioning a read/write head over a selected data track. The entire output of the embedded signal detector is combined with the high-frequency components of the output of the dedicated signal detector to produce a composite track error signal and the head positioning system responds to the composite track error signal to maintain the read/write head over the selected data track.