OCR A Level Computer Science

1.1.3b: The uses of magnetic, flash and optical storage devices.

Keywords:
The characteristics of contemporary processors, input, output and storage devices
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KeywordDefinition
flash storagetype of storage that uses sold state electronic with no moving parts to store 0s and 1s in NAND cells
magnetic storagetype of storage that uses spinning platters to store 0s and 1s on polarised iron particles
non volatiletype of persistent storage where data is preserved when power is switched off
optical storagetype of storage that uses spinning discs to store 0s and 1s on reflective pits and lands
primary storagefast volatile storage (RAM)
secondary storagea type of storage that is slower than RAM but is non volatile and has a higher capacity
volatiletype of storage that loses all data when power is switched off
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