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Overview of Magnetic Tape Storage Technologies and Advantages

This presentation by Atsufumi Hirohata of the Department of Electronics reviews the benefits of magnetic tape storage, including fast data transfer speeds and low energy consumption. It discusses various recording methods, such as linear and helical scan, and dives into the fabrication processes for tape media. Key focus areas include areal density, material properties (such as barium ferrites), and the latest developments in tape storage technology. The presentation emphasizes the continued relevance of tape storage in facilitating large-scale data management solutions.

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Overview of Magnetic Tape Storage Technologies and Advantages

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  1. Advanced Information Storage 06 Atsufumi Hirohata Department of Electronics 17:00 21/October/2013 Monday (AEW 105)

  2. Quick Review over the Last Lecture 1 / 2 reels : • Advantages of tape storages : • Fast data transfer speed • Low energy consumption • Recording methods : • Linear • Linear serpentine • Helical scan * http://www.wikipedia.org/; * http://itpro.nikkeibp.co.jp/article/lecture/20061220/257427/

  3. 06 Magnetic Tape Storage 2 • Fabrication processes • Areal density • Barium ferrites • Thermal stability

  4. Precise Positioning Data subsets are repeatedly stored in various tracks : * Surface smoothness Data track 1280 Tape width ~ 1.27 cm 20 μm Sapporo Tape length ~ 800 m Distribution in left / right Kagoshima * http://home.jeita.or.jp/

  5. LTO Tape Media Track width of LTO tape media : * • 12.65 mm wide tape / 1280 tracks • Track width : 8.1 mm Top ferromagnetic layer Bottom non-magnetic layer Smooth base film (PET, PEN or PA) 70 ~ 80 % thickness Back coating Servo-signal Servo-band 320 320 1280 320 320 Track width : 8.1 mm * http://home.jeita.or.jp/

  6. Tape Fabrication Process 1 Mixing process : * • Materials : • Ferromagnetic particles • Surfactant • Binder • Solvent Filtration Mixing Dispersion Magnetic fluid To coating process * http://home.jeita.or.jp/

  7. Tape Fabrication Process 2 Coating process : * Thickness measurement Drying Alignment Raw tape roll Base film Magnetic fluid Rolling Coating Winding * http://home.jeita.or.jp/

  8. Tape Fabrication Process 3 Calendar process : * Rolling Annealing + Pressurising Winding Smoothing the surface (< 10 nm) * http://home.jeita.or.jp/

  9. Tape Fabrication Process 4 Cutting process : * “Pancake” Rotating cutter Raw magnetic tape Winding Rolling * http://home.jeita.or.jp/

  10. Tape Fabrication Process 5 Test process : * Installation process : * Rolling Winding Rolling Cartridge Test by writing Servo-signals “Pancake” “Pancake” * http://home.jeita.or.jp/

  11. Areal Density Tape drives are catching up the HDDs : * * http://www.oracle.com/

  12. Recent Development In order to store 10 TB data : * * http://www.oracle.com/

  13. Bit Size Roadmap Data subsets are repeatedly stored in various tracks : * * http://www.oracle.com/

  14. New Media Smaller grain sizes required for better signal-to-noise ratios (SNR) : * • Barium ferrites (BaFe12O19) • Hexagonal platelet • Naturally stable oxide (no corrosion) * http://www.oracle.com/

  15. New BaFe12O19 New tape media is under development : * * http://www.oracle.com/

  16. Magnetic Degradation Measuring changes in demagnetization : * Stability equivalent to 30-year ambient storage * http://www.fujifilm.com/news/n100910.html

  17. Head Design Miniaturisation of the head components : * * http://home.jeita.or.jp/

  18. Areal Density Roadmap Consistent increase in areal density is anticipated : * * http://www.oracle.com/

  19. Tape Cartridge Capacity Roadmap Consistent increase in cartridge capacity is anticipated : * * http://www.oracle.com/

  20. Data Transfer Rate Roadmap Consistent increase in data transfer rate is anticipated : * * http://www.oracle.com/

  21. 35 TB Storage Demonstration In 2010, IBM and Fuji Film announced a record : * * http://www.zurich.ibm.com/news/10/storage.html

  22. Tape Storage Can Survive In order to fill the memory / storage access speed gap : * Storage class memory * http://home.jeita.or.jp/

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