Patent ID: 6831808
Filing Date: 2004-12-14
Classification: G11B

Abstract:
A rotating magnetic disk drive data storage device, comprising:a disk drive base; a rotatably mounted disk and spindle assembly, said disk and spindle assembly comprising at least one rigid disk for recording magnetically encoded data on at least one surface of said at least one rigid disk; a movable actuator supporting at least one transducer head, said actuator positioning said at least one transducer head to access said magnetically encoded data on said at least one surface of said at least one rotatably mounted disk; a plurality of angularly spaced track identifying fields recorded on said at least one surface of said at least one rigid disk, each said track identifying field uniquely identifying a track of a respective range of tracks, wherein for at least some of said track identifying fields, the range of tracks identified is less than all tracks on said disk surface; and a servo system which determines track identity during a seek operation using said plurality of angularly spaced track identifying fields, said servo system iteratively assuming a track identity based on data from a track identifying field and estimating acceleration of said transducer based on the assumed track identity, until a track identity is found for which estimated acceleration meets a pre-determined threshold.