Storage

Question 1

Properties of Magnetic

Answer 1

Low speed (80-200 MB/s) - moving parts so slow to access
Standard 5400 rpm or 7200rpm
Good reliability - lasts for a long time
Not robust - break on impact or during vibrations
Low cost
High capacity

Question 2

Examples of magnetic storage

Answer 2

Hard disk drive
Magnetic tape
Hybrid drives

Question 3

Advantages of magnetic

Answer 3

Reliable
Can sort a lot of data in a compact way
Low cost per unit capacity

Question 4

Properties of optical

Answer 4

Great reliability
Low cost
Low speed
Low capacity

Question 5

CD

Answer 5

Compact Disk
The original optical media standard
About 700MB
Very cheap to produce
Transfers 150 kB/s

Question 6

DVD

Answer 6

Digital Versatile Disk
Optical storage
Often for games or films
About 4.7GB
Transfers 1.3 MB/s

Question 7

Blu-Ray

Answer 7

Optical storage
High definition games or films
About 25 GB
Transfers 36 MB/s

Question 8

Solid state

Answer 8

SSD - Solid State Drive/Device

200-500 MB/s but slower as it fills up
Will always outperform magnetic or optical
No moving parts - robust, less energy/heat and portable
Limited write cycles, memory leakage if not powered up for a while.
More expensive than magnetic
High capacity
Store files that are read or changed frequently

Question 9

Optical

Answer 9

Laser beam used to read and write. Pits and lands reflect different amounts of light.