Optical and magnetic storage
Slide deck
Download slide deck
Lesson details
Key learning points
- In this lesson, we will build on what we learnt in the previous 'Secondary Storage' lesson; this lesson involves exploring optical and magnetic storage devices. We will learn how each type of storage operates, and explain how data is written and read from each device. We will then actively rank the storage device in a number of key areas of comparison.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
Video
Share with pupils
Loading...
5 Questions
Q1.
Which features of RAM make it unsuitable for long term storage? (Select all that apply)
It is fast to read & write
Q2.
What features of ROM make it unsuitable for long term storage? (Select all that apply)
It is non-volatile
Q3.
What are the three categories of secondary storage?
Optical, Plastic and the Cloud
The Cloud, Magnetic and Plastic
The Cloud, Optical and Solid state
Q4.
Solid state drives are fast to read and write and take less energy to run than other devices. Which feature allows them to do this?
The storage capacity
Their physical size
They are silent when running
Q5.
Which device has faster read and write speeds?
Solid state storage
6 Questions
Q1.
Optical storage uses light to store data on discs. What device does it use to mark the discs?
A chisel
A light bulb
A magnet
Q2.
The marks and gaps on an optical storage disc are called...
Dots and dashes
Peaks and troughs
Ups and downs
Q3.
Magnetic storage also uses discs to store data. What are the discs inside a hard-drive called?
Disquettes
DVDs
Magnets
Q4.
Magnetic hard-drives use moving parts to store and read data. Which parts of a hard-drive move when it is operating? (Select all that apply)
The outer casing
The output connector
Q5.
When comparing storage devices you should be able to comment on the cost per GB of each type. Which type of storage is the most expensive?
Magnetic
Optical
They are all the same
Q6.
Which type of storage typically has the largest capacity? (Can hold the most data)
Optical
Solid state
They are all the same