Magnatic Media

History:

Much of today’s virtual storage exists within the realms of magnetic storage. Dominating the latter half of the 20th Century, this type of storage first appeared in the 1950s. Magnetic storage depends upon electromagnetism. This technology has many advantages, as well as some disadvantages, which is why in 2010, many types of magnetic storage have given way to some newer and more improved technologies.

Short points:

  • Magnetic storage or magnetic recording is the storage of data on a magnetized medium.
  • Magnetic storage uses different patterns of magnetisation in a magnetisable material to store data and is a form of non-volatile memory
  • This is one of the most convenient way to transfer data from one computer to another, even before the birth of networking, was to save it on some storage media and transfer physical from one station to another.
  • Though it may seem old-fashion way in today’s world of high speed internet, but when the size of data is huge, the magnetic media comes into play.
  • In old computers, magnetic storage was also used for primary storage in a form of magnetic drum, or core memory, core rope memory, thin film memory, twistor memoryor bubble memory. Unlike modern computers, magnetic tape was also often used for secondary storage.

Example:

A bank has to handle and transfer huge data of its customer, which stores a backup of it at some geographically far-away place for security reasons and to keep it from uncertain calamities. If the bank needs to store its huge backup data then its,transfer through internet is not feasible.The WAN links may not support such high speed.Even if they do; the cost too high to afford.

 

In these cases, data backup is stored onto magnetic tapes or magnetic discs, and then shifted physically at remote places.

Types:

Floppy Drive:

  • One of the most popular types of magnetic storage was floppy disks, which today have been rendered obsolete due to more advanced technologies. Floppy disks were advantageous at the time due to their low cost and ease to make. They recorded data using a magnetic head and rotating media.
  • They also had low data transfer rates, meaning that they took a long time to transfer data between sources.

Magnetic Taps:

  • Another type of magnetic storage that has been rendered nearly obsolete is magnetic tape. Magnetic tapes were mostly used within movies and music tapes. This technology was especially popular during the 1980s and early 1990s.
  • The technology ultimately evolved into the VHS format in the 1980's, which became the standard format for video tapes.
  •  if any area of the tape is damaged or broken, it can lead to the entire role being useless. There is also only a small amount of space to record data on magnetic tape.

Hard disk drives:

  • Hard disk drives are commonly found within computers. They were first introduced in 1957, being extremely impractical and disadvantageous at the time because of their large 24-inch diameter. They originally could hold 5 MegaBytes of information.
  • Hard drives have changed tremendously and have grown into a more than $30 billion dollar per year industry with the widespread use of computers across the globe, according to the University of Georgia website.
  • They offer high-speed accessibility and are cheap to make. Occasionally hard disk drives are prone to error; however, advances in technology have made them more reliable.

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