Optimization of data storage density and data media quality monitoring in film storage thermal recording devices

2002 ◽  
Vol 249 (3) ◽  
pp. 428-430
Author(s):  
A Pogorelov ◽  
Ye Pogoryelov ◽  
A Zhuravlev
Keyword(s):  
Data Storage ◽  
Quality Monitoring ◽  
Storage Density

scholarly journals Iterative Signal Detection Scheme Using Multilayer Perceptron for a Bit-Patterned Media Recording System

2020 ◽  
Vol 10 (24) ◽  
pp. 8819
Author(s):  
Seongkwon Jeong ◽  
Jaejin Lee
Keyword(s):  
Signal Detection ◽  
Data Storage ◽  
Multilayer Perceptron ◽  
A Priori ◽  
Magnetic Data ◽  
Bit Patterned Media ◽  
Detection Scheme ◽  
Patterned Media ◽  
Storage Density ◽  
Priori Information

Because of the physical and engineering problems of conventional magnetic data storage systems, bit-patterned media recording (BPMR) is expected to be a promising technology for extending the storage density to beyond 1 Tb /in2. To increase the storage density in BPMR systems, the separation between islands in both down- and cross-track directions must be reduced; this reduction results in two-dimensional interference from neighboring symbols in those directions, which is a major performance degradation factor in BPMR. Herein, we propose an iterative signal detection scheme between a Viterbi detector and a multilayer perceptron to improve the performance of a BPMR system. In the proposed signal detection scheme, we use the modified output of a multilayer perceptron as a priori information to improve equalization and extrinsic information to decrease the effect of intertrack interference.

Magnetic Recording Materials: Present and Future

MRS Bulletin ◽  
1990 ◽  
Vol 15 (3) ◽  
pp. 23-25 ◽  
Author(s):  
Ami Berkowitz
Keyword(s):  
Data Storage ◽  
Magnetic Recording ◽  
Storage Capacity ◽  
Materials Science ◽  
State Of The Art ◽  
Special Issue ◽  
Dominant Position ◽  
Storage Density ◽  
Data Rates ◽  
Contact Recording

For more than 40 years, magnetic recording has been the dominant technology for electronic data storage. During this time, the areal storage density on disks has risen to >108 bits/cm2. On tapes the corresponding figure is 0.2 × 108 bits/cm2. Thus each bit uses about a 1.0 μm2 area. These bits are written and read at data rates that require head-disk relative speeds of tens of meters per second and head-tape relative speeds of several meters per second. All this is accomplished at head-disk spacings of ≈0.2 μm and with contact recording for tapes.It is truly a wonder that the systems work as well as they do. In fact, for many features in magnetic recording systems it isn't certain why they work as well as they do. However, the demand for storage capacity is estimated to be increasing at about 40% per year. So it is natural to ask whether magnetic recording can maintain its present dominant position in the foreseeable future. The answer is — “Very likely, yes” — but this prediction is based on the assumption that a number of formidable fascinating problems will be solved in order to increase the areal bit density.The five articles in this special issue present the state-of-the-art in those key areas of magnetic recording that involve materials science, and they define the problems involved in increasing storage density. James U. Lemke discusses the background and outlook for magnetic recording.

scholarly journals Increasing the storage density of a page-based holographic data storage system by image upscaling using the PSF of the Nyquist aperture

2011 ◽  
Vol 19 (13) ◽  
pp. 12053 ◽  
Author(s):  
Sang-Hyuck Lee ◽  
Sung-Yong Lim ◽  
Nakyeong Kim ◽  
No-Cheol Park ◽  
Hyunseok Yang ◽  
...  
Keyword(s):  
Data Storage ◽  
Storage System ◽  
Holographic Data Storage ◽  
Storage Density ◽  
Data Storage System

Pupil apodization for increasing data storage density

2009 ◽  
Vol 7 (8) ◽  
pp. 720-723 ◽  
Author(s):  
Vidal F. Canales Vidal F. Canales ◽  
Pedro J. Valle Pedro J. Valle ◽  
Jose E. Oti Jose E. Oti ◽  
and Manuel P. Cagigal Manuel P. Cagigal
Keyword(s):  
Data Storage ◽  
Storage Density

scholarly journals New developments in data storage

1982 ◽  
Vol 64 ◽  
pp. 79-83
Author(s):  
P.J. Grosbøl
Keyword(s):  
Data Storage ◽  
Magnetic Recording ◽  
Primary Data ◽  
Photographic Emulsion ◽  
New Developments ◽  
Storage Density ◽  
Archival Storage ◽  
Order Of Magnitude ◽  
Reduced Data

AbstactIt is estimated that up to 100 Gbytes of primary data from digital detectors have to be stored each year. The amount of reduced data is at least one order of magnitude smaller. Although the storage density for magnetic recording can be made higher, only the optical technic can provide a substantial denser medium than the photographic emulsion. It seems likely that optical read-only devices will be developed for archival storage of data in this decade. Magnetic recording of data will still be preferred whenever changing of the information is important.

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