Computing storage

Why cant ROM be used to save files?
Because you cant write to the file, it holds the BIOS
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Why cant RAM be used to save files?
Because when you switch your PC off the data is lost (volatile)
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Why is secondary storage needed?
It is non-volatile storage that is used when primary storage is full
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4 types of primary storage?
RAM, ROM, registers and cache
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Whats held in secondary storage when not in use?
The Operating System, programs and data
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What is tertiary storage?
Used to describe backups and archives of larges amounts of data in the long term
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An example of tertiary storage
magnetic tape library
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What is Magnetic storage?
Secondary storage that uses minute magnetic particles or 'domains' to store data
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What is Solid State Storage?
Solid state media hold data using electronic switches. If the switch is open, it represents a '1', since it retains an electric charge. If it is closed, it represents a '0'
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What is Optical Storage?
A laser beam burns tiny dark pits on to the surface of the optical disk. If a pit is present, this can represent a data bit being '1' and if no pit is present, this can represent a data bit being '0'.
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Advantages of Magnetic Storage?
Cheapest, highest capacity, long read/write file life than SSD
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Disadvantages of Magnetic Storage?
slower than solid, needs defragmenting
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Advantages of Solid State?
faster, dont need fragmenting, more shock-proof than HDDs
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Disadvantages of Solid State?
expensive, Less durable than a hard disk
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Advantages of Optical Storage?
Cheap , Very portable
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Disadvantages of Optical Storage?
slowest, lowest capacity
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Example of Solid State
USB memory sticks, Solid State Drives and SDHC memory card
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Example of Magnetic Storage
A hard disk,
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Example of Optical Storage
CD, DVD and Blu-ray disks
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What is cloud storage?
The use of the Internet to store files and provide software, aka 'the cloud'
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Advantages of Cloud Storage?
can connect from any device, easy to increase how much storage available, cloud host provides secirty and backups for you
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Disadvantages of Cloud Storage?
need connection from the internet, dependant on host for secuity/backups, data in the cloud can be vulnerable to hackers
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Other cards in this set

Card 2

Front

Why cant RAM be used to save files?

Back

Because when you switch your PC off the data is lost (volatile)

Card 3

Front

Why is secondary storage needed?

Back

Preview of the front of card 3

Card 4

Front

4 types of primary storage?

Back

Preview of the front of card 4

Card 5

Front

Whats held in secondary storage when not in use?

Back

Preview of the front of card 5
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