8.2.4 Storing and Retrieving
8.2.4 Storing and Retrieving
Storing and Retrieving is the process by which data and information is saved and accessed later
Real World Examples
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Accordion folder- It is intended for filing and organizing papers (usually in alphabetical order) to be retrieved later. As a result of this particular order, files can be easily retrieved by the user.
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Filing cabinet- This is used to collect and organise files for later. Much like the accordion folder, it can be easily accessed and used.
Hardware
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Hard Drive- A hard drive is used to save data in a storage like manner so that it can be accessed at any time. These can usually store upwards of 250 GBs worth of data so that if a computer runs out of memory, the data can be moved.
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Flash Storage – Flash storage is also used to save data, however flash storage is a faster storage option to a hard drive.
Software
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Operating System
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Word Processing Software – The document has the ability to be saved and retrieved at a later date.
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Skydrive – Skydrive is a cloud service by Microsoft which saved data to an online server rather than directly to the computer. This can be used so that, data can be accessed at a later device or even on another device.
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Time Machine – Time Machine is a backup system on Mac computers which regularly backs up the computer automatically, to a portable hard drive or Time Capsule.
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Any program/Application which requires saving or recovering.
Social and Ethical Issues
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Who can access the data
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Who can retrieve said data
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Who can keep/store the data
Microfiche:
Volatile and Non Volatile Memory – Non volatile storage doesn’t need power to story information, volatile does need power e.g. ram
Random and Sequential Access – Sequential – you have to go through everything to get to where you want (e.g. tapes – fast forwarding and reversing), Random – you can jump to wherever you want to go to (e.g. dvd – going to a specific chapter). Random access is significantly faster.