UNIT A451: Computing Hardware: Secondary Storage

UNIT A451: Computing Hardware:

Secondary Storage

Storage and Memory

You are a spy

You have broken into the secret enemy compound

You have 15 seconds to memorise the code

CI AFB IKG BDN ABB C UKC NNU SA

CIA FBI KGB DNA BBC UK CNN USA

How many can you remember

Learning Outcomes

1. Explain the need for secondary storage

2. Be aware of a range of storage devices

3. Select suitable storage devices and storage media

4. Know which storage device to use for saving or storing

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A bit – the smallest measure of memory

A

LO

Task

• How many different ways are there to save / store information

• Compare what information you could or could not store - for example a telephone number on A3 paper would be a waste.

LO

Storage devices

• Optical (e.g. CD and DVD for data storage)

• Magnetic media (e.g. internal and external hard disk drives (HDD), tape)

• Solid State Drives (SSD), Memory cards, i.e. flash memory devices

• Network (e.g. routers, modems)• Cloud storage 

Task• Draw one of these storage devices• Line up in order of size• Think about the advanatges of the

device for storage• Line up again• Think about the dis-advanatges of the

device for storage• Line up • Which is the best device?

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