Introducing 

Prezi AI.

Your new presentation assistant.

Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.

Loading…
Transcript

Computer science mind map

Storage devices, media and comparisons

-By Nat

Storage types

Types of storage

Storage is the way we retrieve data on computers or store data for future use

Solid state

Solid State Storage

solid state is a non-volatile computer storage that stores and retrieves information using only electronic circuits, without any involvement of moving parts.

Optic storage

Optic

Optical Data is recorded by creating marks in unique patterns which can be interpreted back as data with the use of light.

Magnetic storage

Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data.Magnetic storage uses a mechanical device which is connected to the computer.

Magnetic

How they work

How they work

Solid state drives, Optical drives and Magnetic drives have different ways of working.

Solid state drives

Solid state storage, Flash memory

it uses semiconductor chips, not magnetic media, to store data. A hard disk drive uses a mechanical arm with a read and write head to move around and read information from the right location on a storage platter. This difference makes SSDs much faster.

Examples:

-USB memory sticks

-Mobile phones

-Digital audio players.

Optical storage

How optical storage works

Optical Data is recorded by creating marks in unique patterns which can be interpreted back as data with the use of light.

Examples:

-Bluray DVD

-DVD ROM

-CD ROM

Magnetic

Magnetic storage

The hard disk or the floppy disk spins around 10,000 revolutions per minute and the the data is stored on tracks which are divided into sectors.

Examples:

-Fixed Hard Drive

-Portable Hard Drive

-Hard drives

MEMORY

Short and Long term memory

Memory is any physical device capable of storing information temporarily. There are two types, short term and long term.

Whats RAM?

Each computer has RAM, it loads operating systems like Microsoft word for example. Ram can only load a certain amount of programs until it requires virtual memory in the hard drive to help. Additionally, RAM is volatile so if you accidentally turn of your computer everything stored in RAM, such as homework will be lost if its not saved

RAM

Comparison

Comparison

Different storage devices can have better features than others in term of:

-Capacity

-Durability

-Transportation

-Reliability

Solid state

Solid state Storage

Advantages:

-Very portable and small

-Less threat from online attacks

-Cheap and effective

-Long lasting

Disadvantages:

-Easy to loose

-Requires expensive equipment to use

-Difficult to recover lost files

Optical Storage

Optical

Advantages:

-Small and portable

-Cheap to get

-Pretty fast to access

-Works with most computers

Disadvantages:

-Very fragile, can break easily

-Not a lot of storage compared to hard drives

-Slower than hard drives to access

Magnetic

Magnetic

Advantages:

-Not expensive

-Very easy and fast to access data

-Can access on any part of the drive

-large storage space

-Can be portable

Disadvantages:

-Data can be messed with by magnetic fields and dust

-Gradually lose their charge

-Hard disks are not very reliable as they stop working

-Can crash unexpectedly

Scenarios

Double click to edit

Scenarios

Devices and media

Devices and Media

The device that actually holds the data is known as the storage medium.

The device that saves data onto the storage medium, or reads data from it, is known as the storage device.

DEVICES

Storage media

Storage Media

Memory can be Short term, Long term or permanent. Storage media is storage that stores applications and user information. The primary storage media for a computer is usually the internal hard drive which is normally around 1 TB, However these can be external as well! For example:

-Flash drives

-External Hard drives

Secondary storage

Secondary

A secondary storage device refers to any non-volatile storage device that is internal or external to the computer. Its a storage devices that serves as an addition to the computer's primary storage like RAM. These devices store virtually all programs and applications like operating systems

Primary storage

Primary

Primary storage, also known as main storage, is meant to be easily assessed by the CPU. The best example is RAM, used for the operating systems and to load applications as the CPU can access any part of RAM at the same speed much greater than it can access on any other storage devices.

Learn more about creating dynamic, engaging presentations with Prezi