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AO2.3 Storage devices and media
A. describe common backing storage media (including magnetic tapes, hard discs, all forms of CD
and DVD, memory sticks, flash memory) and their associated devices
B. identify typical uses of the storage media, including types of access (e.g. serial/sequential,
direct/random) and access speeds
C. describe…

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The process of backing up, refers to the copying and archiving of computer data so it may be used to
restore the original file if a problem occurs. Backups are needed because in big places like offices or
schools, there is a lot of work that people do and that…

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Storage
Item Description capacity Use
Magnetic Tape thin strip of plastic which is coated 1.6TB batch processing, back
in a magnetic layer. The data is up media.
stored in magnetic areas which
represent 1s and 0s.
Hard disk It is connected to the computer via up to 400GB It can…

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Memory stick The memory stick is thin, fast and average of 16GB Memory sticks are usd
uses solid state technology. They for transporting files
have a much faster data access between computers or
time, all enabling it to replace hard used as a back up store.
disk drives in computers…

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Type of access Advantage Disadvantage
serial access cheaper than hard slow access time, when
disk, robust updating another tape is
technology, fast data needed.
transfer rate
direct access They can access time It can be easily accidently
and data transfer is damamged if the user drops it
very fast. They…

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direct access They are very It is not possible to write
compact and protect the data and files.
portable media. Additionally, their small
They are also very physical size means they are
robust. very easy to lose.




direct access very compact, very expensive per GB of memory,
robust. finite life,…

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