Storage Devices And Media

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STORAGE DEVICES AND MEDIA

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Fixed hard discs Used to store

operating system Fast- Access Program Not for portability

application

used for online, real time direct accessUsed in file servers for computer networks

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Portable hard discs Used to store very

large files which need transporting

expensive than other forms of removable media (Price)

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Magnetic tapes Requires large storagecapacity Speed is not

necessary Used serial Used for backups of

file server, computer networks

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CDs and DVDs

CD- Can be used to store computer data

-Portable

- Store for large files (smaller than 1Gb)

DVD- Can be used to store

computer data

- Portable- Store file larger than

CD

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Applications which require the prevention of deletion of data even if you accidently delete it.

CD ROM/DVD ROM

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CD R/DVD R

Applications which require a single ‘burning’ of data…-Recording music (MP3) and movies in DVD R. -> An example of CD-R-This one can store 700MB

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CD RW/DVD RW

Can record over old data, update of data

Not suitable of music Suitable for keeping

data files

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DVD RAM

Aspect Rati

(Should appear circular)

DVD RAM comes in different size of storage

2.6, 4.7,5.2 9.4GB

Therefore, DVD RAM can be written over old data

Can be written over more than 100000 times.

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HD DVD

This type of DVD is used

in video recorders

Used in game

console

HD is short for

High Definition

DVD

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Blu-Ray (BR)

• This type is the largest storage capacity of optical disc.

•Used in game console, video recorders and computer memory

Comparing DVDs and Blu-ray disc

High definition

Require Blu-ray reader

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Solid state backing storage

Ex.

Smallest type of memory

Removable storage

•Ex.This type is more expensive but is easy to update data

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Memory sticks/Pen drives• Can be use to

transport data between computers

This type of storage can be stored up to many GB

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Flash memory cards

Used in digital cameras, palmtops, mobile phones, MP3 playersHigh re-record-ability and power-free storage