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

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Presentation on theme: "Department of Electronics Advanced Information Storage 06 Atsufumi Hirohata 17:00 21/October/2013 Monday (AEW 105)"— Presentation transcript:

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 : * *

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 : * * 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 : * 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 Track width : 8.1 m *

6 Tape Fabrication Process 1 Mixing process : * Magnetic fluid To coating process Materials : Ferromagnetic particles Surfactant Binder Solvent * Filtration Dispersion Mixing

7 Tape Fabrication Process 2 Coating process : * Magnetic fluid Base film Raw tape roll * Winding Thickness measurement Drying Rolling Coating Alignment

8 Tape Fabrication Process 3 Calendar process : * * Winding Rolling Annealing + Pressurising Smoothing the surface (< 10 nm)

9 Tape Fabrication Process 4 Cutting process : * * Winding Rolling Raw magnetic tape Rotating cutter Pancake

10 Tape Fabrication Process 5 Test process : * * Winding Rolling Pancake Test by writing Servo-signals Installation process : * Rolling Pancake Cartridge

11 Areal Density Tape drives are catching up the HDDs : * *

12 Recent Development In order to store 10 TB data : * *

13 Bit Size Roadmap Data subsets are repeatedly stored in various tracks : * *

14 New Media Smaller grain sizes required for better signal-to-noise ratios (SNR) : * * 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 : * *

16 Magnetic Degradation Measuring changes in demagnetization : * * Stability equivalent to 30-year ambient storage

17 Head Design Miniaturisation of the head components : * *

18 Areal Density Roadmap Consistent increase in areal density is anticipated : * *

19 Tape Cartridge Capacity Roadmap * Consistent increase in cartridge capacity is anticipated : *

20 Data Transfer Rate Roadmap * Consistent increase in data transfer rate is anticipated : *

21 35 TB Storage Demonstration * In 2010, IBM and Fuji Film announced a record : *

22 Tape Storage Can Survive In order to fill the memory / storage access speed gap : * * Storage class memory


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