201 Gb/in2 Recording Areal Density on Sputtered Magnetic Tape

• Published in: IEEE transactions on magnetics Vol. 54; no. 2; pp. 1 - 8
• Main Authors: Furrer, Simeon, Lantz, Mark A., Reininger, Peter, Pantazi, Angeliki, Rothuizen, Hugo E., Cideciyan, Roy D., Cherubini, Giovanni, Haeberle, Walter, Eleftheriou, Evangelos, Tachibana, Junichi, Sekiguchi, Noboru, Aizawa, Takashi, Endo, Tetsuo, Ozaki, Tomoe, Sai, Teruo, Hiratsuka, Ryoichi, Mitamura, Satoshi, Yamaguchi, Atsushi
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-02-2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Bit error rate; Decoding; Density; Disk drives; Error detection; Error signals; Hard disks; Head; Magnetic heads; Magnetic recording; Magnetic tape; Magnetism; Magnetoresistivity; Media; Noise prediction; Perpendicular magnetic recording; Position errors; Prototypes; Recording; signal detection; sputtered tape; Sputtering; tape storage; tracking
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2017.2727822

A prototype perpendicularly oriented sputtered tape sample was investigated using a prototype high-moment tape write head and a 48 nm-wide tunneling magnetoresistive hard disk drive read head. A linear density of 818 kbpi with a post-detection byte-error rate <;0.023 was demonstrated based on measured recording data and a software read channel that used an extended version of the noise-predictive maximum-likelihood detection scheme that tracks the mean of the data-dependent noise. Using a previously reported iterative decoding architecture, a user bit-error rate of <;1e-20 can be achieved at this operating point. Track-following servo performance characterized by the standard deviation of the position error signal (σ-PES) ≤ 6.5 nm was also demonstrated over a tape speed range of 1.2-4.1 m/s. This magnitude of PES in combination with a 48 nm-wide reader enables reliable recording at a track width of 103 nm corresponding to a track density of 246.2 ktpi, for an equivalent areal density of 201.4 Gb/in 2 .