Patent ID: 8619384
Filing Date: 2013-12-31
Classification: G11B

Abstract:
1. A servo system configured to determine a relative lateral movement and velocity between a tape and a tape head, the tape having at least one longitudinal defined servo track, the servo track including a longitudinal series of identical servo pattern frames, each servo pattern frame including two pairs of non-overlapping parallel magnetic transitions, the transitions of each pair being spaced apart an equal distance d, the transitions of the first pair forming an azimuth angle η to the longitudinal axis of the tape, the transitions of the second pair forming the azimuth angle η to the longitudinal axis of the tape but at an opposite slope about the lateral axis of the tape, the servo system comprising: a tape head including a servo read head configured to read the servo pattern frames in the at least one servo track and produce servo signals at times T a servo channel configured to receive the servo signals and determine a relative lateral movement LM and or respectively.