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

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

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 : * * http://home.jeita.or.jp/ Tape width ~ 1.27 cm Kagoshima Distribution in left / right Data track 1280 Tape length ~ 800 m Sapporo Surface smoothness 20 μ m

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

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

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

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

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

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

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) : * * http://www.oracle.com/ Barium ferrites (BaFe 12 O 19 ) Hexagonal platelet Naturally stable oxide (no corrosion)

15. New BaFe 12 O 19 New tape media is under development : * * http://www.oracle.com/

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

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 * http://www.oracle.com/ Consistent increase in cartridge capacity is anticipated : *

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

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

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