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Information storage is an important aspect of the information system. Without information storage, information collected and processed cannot be fully utilized,meanwhileWe also need to spend money, people and materials to organize the re collection and processing of information.With information storagesureIt ensures that you can get information when you use it, creating conditions for the multi-functional use of unit information, thus greatly reducing costs.Its advantages areAccess speedExtremely fast, with a large amount of data stored.Information storage should decide what information exists and what media line is appropriate.In general, the voucher file should be stored in paper media;Business documents are stored in paper or tape;Master files, such as enterprise structure, personnel files, equipment or material inventory accounts, should be stored on disk for online retrieval and query.
Information storage is to save the obtained or processed information for future application.The equipment used for information storage and data storage is the same, but information storage emphasizes the idea of storage. Why should we store thesedataHow to store these data and what existsmediumWhat is the future use, and what is the possible effect on decision-making.Only by discarding information correctly can we use information correctly.
Information storage and data storage
The equipment used for information storage and data storage is the same, but information storage emphasizesStorageThe idea of why and how to store these dataStorageWhat media does the data exist on, and what will it be used for in the futurepolicy decisionWhat is the possible effect.
storage medium
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paper
Advantages: large stock, small size, cheap, good permanent preservation, and not easy to alter.It is as easy to save numbers, words and images.
Disadvantages: slow transmission of information and inconvenient retrieval
film
Advantages: high storage density.Easy to query
Disadvantages: reading must be through the interface device, which is inconvenient and expensive.
computer
Advantages: extremely fast access speed and large amount of data stored
Information storage should decide what information exists and what media line is appropriate.In general, the voucher file should be stored in paper media;Business documents are stored in paper or tape;The main file, such asenterpriseMedium enterprise structure;Personnel filesMaterial Science;Equipment or materialstockAccounts should be stored on disk for online retrieval and query
primary coverage
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Material evolution
Information storage
Information storage materials have been mainly magnetic recording since 50 years ago.The recording density of disk has exceeded 108 bits/cm2, and that of tape is 0.2 × 108.Both magnetic disks and magnetic tapes are made by coating magnetic particles (γ - Fe2O3 ferrite) on disks or organic films. The products have low cost and good stability.In the 1960s, CrO2 and iron oxide powder modified by (Co++) were developed as materials with higher recording density.In the 1970s, ultra-fine iron powder (0.2 μ × 0.02 μ) was developed, and in the 1980s (BaO · 6Fe2O3) barium ferrite ultra-fine powder coated on (0.1 μ diameter) and (0.01 μ thickness disc) had good magnetic recording performance.Metal thin film recording, which has been studied since the 1950s, has developed a variety of film materials: Co, CoNi, CoNiCr and CoCr/NiFe vertical recording bilayer films, which have a wide range of applications and development prospects.The magnetic recording properties of three materials are compared as follows: ferrite (γ - Fe2O3), sputtered continuous film (Co Cr), and vertical recording double-layer film (CoCr/FeNi). Their commercial application levels are 12000 (bits/inch), 40000 (bits/inch), and 150000 (bits/inch) respectively;The application limits are<30000 (bits/inch),>70000 (bits/inch) and>500000 (bits/inch) respectively;Area density is 107 (bit/inch2), 108 (bit/inch2), 109 (bit/inch2) respectively.
Optical storage and magneto-optical storage discs developed in the 1990s have high storage density, can reach (1010 bits/cm2), long service life (>105 times), high fidelity and erasable.Optical discs have developed rapidly and have been widely used.The early application of magneto-optical materials was amorphous GdCo, and then ternary alloys, transition groups, and rare earth elements were used: GaTbFe, TbFeCo. The film overlap of Co and Pt can achieve better results, and its thickness is only 4ÅAnd 10~20Å,It needs to be prepared by molecular beam epitaxy.
effect
Information storage is an important aspect of the information system. If there is no information storage, information that has been collected and processed cannot be fully utilized. At the same time, it will also cost money, people and materials to organize the re collection and processing of information.YesInformation storage, you can ensure that you can get it when you use it, creating conditions for the multi-functional use of unit information, thus greatly reducing costs.
Advantages: extremely fast access speed and large amount of data stored
Information storage should decide what information exists and what media line is appropriate.In general, documents should be stored in paper media;Business documents shall be stored in paper or magnetic tape;Master files, such as enterprise structure, personnel files, equipment or material inventory accounts, should be stored on disk for online retrieval and query.
Advantages
The arrival of the information age has highlighted the superiority of Chinese characters.The new computer in the 21st century will adopt voice control system, which will abandon the keyboard made of letters. Because English has more than 10000 syllables, while Chinese has only 400 syllables, each syllable can have up to 4phoneme, due to American linguist GaryIn his book World Language, Guinness spoke highly of the conciseness, accuracy, rigor and advancement of the Chinese language, and believed that it was the efforts of the Chinese people for thousands of years that had "wiped out all the troubles in the Western grammar books", and finally "left only a few thousand words and some highly efficient typesetting rules".Mike Cruise, the former editor in chief of the British New Science and Technology Magazine and an expert in scientific and technological invention reporting, asserted that in the near future, the Chinese language will give full play to its power. At that time, the world's research center on language and character structure may be transferred to China.In the early 20th century, people in China, because of indignation at the backwardness of China's science and technology, tried to get rid of the barrier of characters, recognized the world, and called for the pinyin of Chinese characters.Once upon a time, Chinese characters were proved by their strong vitality
Understand its infinite potential.It was the computer that accepted the Chinese characters, not the computer that changed them.Therefore, some people call it computer text, which indicates that it is the language with the best information exchange application among humans.
Future development
From the earliest tape drive to today's LTO, modern storage technology has gone through half a century.At the commemorative event held by IBM for this purpose, experts described the trend of intelligent storage in the future.
In 1952, IBM launched the first tape drive 726.It makes people say goodbye to the way of using punch to store data.The invention of laser diode in 1962 laid the foundation for optical reading and writing.As a result, from the 1960s to the early 1970s, there was an upsurge to increase functions, shorten service time, reduce equipment occupation, and simplify tape paths.The floppy disk invented by IBM in 1970 became the mainstay of portable storage.At the end of last century, the development of virtual tape server greatly improved the data sharing ability and tape efficiency.The smallest and lightest hard drive in the world has laid a solid foundation for the development of mobile storage.
At present, with the application and development of the Internet and e-commerce, the data stored in the enterprise network has become the most valuable asset of the enterprise. Storage is no longer an auxiliary backup device attached to the server, and is increasingly moving towards the core of the enterprise information system.The effective storage protection, backup and disaster recovery of information have become important aspects that enterprises urgently need to consider when building IT infrastructure.
"The storage in the future will not only have higher capacity, speed, and performance price ratio, but also have self-healing and self-management functions, as well as a high degree of openness and interoperability." He Guowei, general manager of IBM's storage system department in Greater China, said that it will not take another 50 years to achieve fully intelligent storage.
