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This document provides a guide on how to properly store and care for magnetic media to maximize their life expectancies. An introduction compares magnetic media to paper and film and outlines the scope of the report. The second section discusses things that can go wrong with magnetic media. Binder degradation, magnetic particle instabilities, substrate deformation, magnetic tape recorders; and format issues are highlighted in this section. The third and fourth sections cover preventing information loss with multiple tape copies, costs, and how long magnetic media will last. In the fifth section, care and handling, storage conditions and standards, and refreshing of tapes are described for preventing magnetic tape from degrading prematurely. An appendix provides the Ampex Guide to the Care and Handling of Magnetic Tape, an estimation of life expectancies, sources for further reading, resources for transfer and restoration of video and audio tape, and a glossary. (AEF)
"The first magnetic recording device was demonstrated and patentedby the Danish inventor Valdemar Poulsen in 1898. Poulsen made amagnetic recording of his voice on a length of piano wire. MAGNETICRECORDING traces the development of the watershed products and thetechnical breakthroughs in magnetic recording that took placeduring the century from Paulsen's experiment to today's ubiquitousaudio, video, and data recording technologies including taperecorders, video cassette recorders, and computer harddrives. An international author team brings a unique perspective, drawnfrom professional experience, to the history of magnetic recordingapplications. Their key insights shed light on how magneticrecording triumphed over all competing technologies andrevolutionized the music, radio, television and computerindustries. They also show how these developments offeropportunities for applications in the future. MAGNETIC RECORDING features 116 illustrations, including 92photographs of historic magnetic recording machines and theirinventors." Sponsored by: IEEE Magnetics Society
The Complete Book of Magnetic Recording Get the very latest and most up-to-date information on every aspect of magnetic recording with the 4th edition of one of TAB's all-time best-sellers. Often referred to as the "Bible" by technicians and engineers working in the magnetic recording industry, the Handbook is practical rather than theoretical in its approach. In the rapidly growing field of magnetic recording, this book is truly the "authority" with easy access to topics of interest and extensive instruction on the equipment and techniques prevalent in the industry. This massive reference volume contains numerous illustrations and three indexes (illustrations, names and terms) for quick cross-referencing. References are also included for further study. Every engineer and technician working in the field of magnetic recording should add the Handbook to their reference shelf.
In this book, worldwide experts from universities, public research institutions, and industry have collaborated to illustrate the most recent advances and developments in magnetic recording from the media perspective, including theoretical, experimental, and technological aspects. It provides an overview of the emerging classes of magnetic memories regarded as potential candidates for future information storage devices. Comprehensive references, together with clear and thorough figures, complement each section, making the book a useful reference for final-year undergraduates, postgraduates, and research professionals in the magnetic recording area.
Thoroughly updated, the second edition of the Magnetic Recording Handbook incorporates extensive changes ushered in by advances in digital recording
"This book is concerned with establishing the underlying technologies that are common to all forms of magnetic recording ... adaptable to a wide variety of data, video, and audio applications, both at the business and consumer levels."--Preface, p.xv.
Magnetic recording is presently a $50 billion industry. It spans audio, video, and digi tal applications in the form of tapes and disks. The industry is expected to grow by a factor of five or more in the next decade. This growth will be accompanied by dramatic improvements in the technology, and the potential exists for magnetic-recording den sities to improve by at least one order of magnitude! Magnetic-recording process is accomplished by relative motion between a mag netic head and a magnetic medium. Types of magnetic media for digital recording are: flexible media (tapes and floppy disks) and rigid disks. Physical contact between head and medium occurs during starts and stops and hydrodynamic air film develops at high speeds. Hying heights (mean separation between head and medium) are on the order of 0. 1 micrometer comparable to surface roughness of the mating members. Need for higher and higher recording densities requires that surfaces be as smooth as possible and flying heights be as low as possible. Smoother surfaces lead to increased static/ kinetic friction and wear. In the case of magnetic tapes, in order to have high bit capac ity for a given size of a spool, we like to use as thin a tape substrate as possible. Thinner tapes are prone to local or bulk viscoelastic deformation during storage. This may lead to variations in head-tape separations resulting in problems in data reliability.