BCM432 INFORMATION COMUNICATION TECHNOLOGY
HISTORY OF DATA STORAGE
Definition of Data Storage
* Storage Devices are the data storage devices that are used in the computers to store the data. The computer has many types of data storage devices. Some of them can be classified as the removable data Storage Devices and the others as the non removable data Storage Devices. *
* Data storage can refer to anything with information recorded on it. Using this broad definition, a hardback volume of an encyclopedia, an audio cassette of a pop song, and even a piece of paper with random words written on it would all be considered examples. The most popular definition of the term limits it to only the storage of information on computers and similar devices. The memory is of two types; one is the primary memory and the other one is the secondary memory.
The primary memory is the volatile memory and the secondary memory is the non volatile memory. The volatile memory is the kind of the memory that is erasable and the non volatile memory is the one where in the contents cannot be erased. Basically when we talk about the data storage devices it is generally assumed to be the secondary memory.
The secondary memory is used to store the data permanently in the computer. The secondary storage devices are usually as follows: hard disk drives – this is the most common type of storage device that is used in almost all the computer systems. The other ones include the floppy disk drives, the CD ROM, and the DVD ROM. The flash memory, the USB data card etc.
History of Data Storage
* The earliest known form of data storage was punch cards which were created in 1725 by Basile Bouchon. They had a perforated paper loop to store patterns which could be used on cloth. In 1846 Alexander Bain improved on this idea with the invention of punched tape which could hold significantly more data than their predecessor. *
* With the invention of computers came the need for larger data storage methods. A device called a Selectron tube was developed by the RCA in 1946 which could store 4096 bits of information. A few years later magnetic tape was released as an improved way of storing data. This was then refined and placed in Compact Cassettes and VHS.
Data Storage Evolution
* Cahuvet – Point – d’Arc
When caveman memories needed to be transferred quickly among each other they took to their walls of their abodes to record the data. Gambar 1 - Cahuvet
* Stone Tablet
* Cave paintings had a critical point of failure in that they were unmovable. * Papyrus/Paper
* While stone tablet had their heyday, carrying more than one proved problematic and dangerous for obvious reasons. Gambar 2 - Stone Tablet & Papyrus/Paper
18th - 19th Century
* Punch Card
The punch card is a perforated paper loop used to store patterns rather than actual data. In 1881, Herman Hollerith, who would later form IBM, designed a paper punch machine to tabulate census date. It had taken the U.S. Census Bureau eight years to complete the 1880 census, but thanks to Hollerith's invention, that time was reduced to just one year.
* Filling Cabinet
In 1898, the first filling cabinet was used at insurance firm, it is an early form of multi-file compression storage.
Gambar 3 - Punch Card&Filling Cabinet
* Magnetic Tape
Introduced in the 1950s, magnetic tape is a revolution in the broadcast and recording industries. Made of magnetizable coating on a long, thin strip of plastic, magnetic tapes allowed unmatched amounts of data to be created, stored and rapidly accessed. Magnetic tape was the most popular means of storing data until the mid 1980s, since a single roll could store 1TB, or as much data as 10,000 punch cards.
* Compact Cassette
The Compact Cassette was introduced by Philips in 1963 as...
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