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types of information storage - Coggle Diagram
types of information storage
paper
Paper is a traditional form of information storage and includes forms, handwritten notes, maps and telephone directories. However, it is easily damaged when handled, costs a lot of transport and can be hard to keep secure.
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magnetic media
Magnetic media uses magnetic patterns to store data. a common example of magnetic media is a magnetic hard drive. this storage is slower than others such as [[Solid state media]] however has an extremely large storage capacity and is very cheap.
Any storage medium that utilizes magnetic patterns to represent information is considered magnetic media. Good examples of a magnetic media and magnetic storage is a tape drive, floppy diskette, and hard drive
Above is an example of the read/write head inside a hard drive. The electromagnetic write head polarizes tiny sections of the hard drive so they face up or down ("North" or "South") to represent the binary digits 1 or 0. The read head detects the polarization of each section of the drive to understand the data that was written.
optical media
The presence of a burn will absorb & refract the light from a reading laser beam, therefore that will be interpreted as a 1.
Optical media is a form of media read and written by a laser which examines the pivots and dips in the cd which represent 1's and 0's. this method is cost effective, but is very easily damaged and has a low storage capacity.
To store a 1 on a CD, a stronger laser is used to "burn" the surface and leave a mark. This burn effects the reflection from the surface from the less powerful (reader) laser.
All computer technology is binary, so stores data in 1's and 0's.
These technologies work by bouncing a very fine laser beam off a surface to detect the data that has been imprinted on it.
CD and DVD are two different kinds of Optical Media
solid state media
This type of media stores data in circuitary rather than on a disk or tape. this makes it extremely reliable and [[robust]].
Characteristics
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Different forms of storage media have their advantages and disadvantages.
some formats can be changed/edited, whereas some are created and then can only be read from.
some forms of media are more [[robust]] than others.
Some formats are quicker/better at accessing data. media such as [[Solid state media]]
is much faster at storing and retrieving data than a medium such as [[Magnetic media]].
cost. some forms of storage are more expensive than others.
storage capacity. - the amount of data a device can store.
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