Technologies for magnetic tape recording at 100Gb/in2 and beyond
Mark A. Lantz, Simeon Furrer, et al.
INTERMAG 2015
Achieving multi-Terabyte capacity in tape cartridges requires a substantially higher track density than that available in present systems, and hence a significantly higher positioning accuracy is required of the track-following servo in tape drives. In this paper, advanced concepts are considered for several elements of a tape system that enhance the track-following servo performance to reach nanometer positioning accuracy. We introduce a novel method for optimizing the geometry of servo patterns in a timing-based servo system. The design criterion aims to minimize the measurement error in the position-error signal (PES) yielded by a digital synchronous servo channel. A flangeless tape path is adopted to mitigate high-frequency components of the lateral tape motion. The track-following servo controller, which is designed based on the H ∞ approach, takes into account the measured plant transfer function, the disturbance characteristics of the tape path, and the properties of servo channel. These elements are combined to investigate the track-following performance achievable with a new high-SNR magnetic tape based on perpendicularly-oriented BaFe particles.With this setup, a record closed-loop track-following performance of less than 14 nm PES standard deviation is demonstrated. © 2011 IEEE.
Mark A. Lantz, Simeon Furrer, et al.
INTERMAG 2015
Simeon Furrer, Angeliki Pantazi, et al.
INTERMAG 2015
Mark A. Lantz, Angeliki Pantazi, et al.
IFAC Proceedings Volumes
Ana Stanojevic, Stanisław Woźniak, et al.
Nature Communications