Storage

Question 1

What is optical storage? +/-

Answer 1

Uses a laser and by looking at the discs reflection determines where there pits on the surface representing 0's and 1's
Eg: CD's, DVD's, and Blu Ray discs 
\+cheap
\+resilient 
-Limited storage

Question 2

What is Flash storage? +/-

Answer 2

Uses a special type of ROM that be overwritten
Eg: SSD’s
+ Read and write very high
+No moving parts = versatile
+Consumes less power
-expensive
-each storage location has limited number of read and writes
Can’t be defragmented due to how often data is being read and written

Question 3

What is virtual storage? +/-

Answer 3

Virtual storage is cloud storage
\+Large amounts of storage available 
\+Auto back ups
\+Stored 'off site' meaning it will be safe even if main system brakes 
-You cannot ensure Its security

Question 4

What is magnetic storage? +/-

Answer 4

Patterns of magnetisation used to represent binary sequences eg: Hard disk drive
+ High capacity
+low cost
-Not the fastest
-Can be damaged if dropped due to moving parts