1.2.2 Flashcards
why do you need secondary storage?
needs to be a way of saving storage for future use
what are the different types of secondary storage?
-magnetic
-optical
-solid state
how does magnetic storage work?
uses minute magnetic particles to store data
what is an example of magnetic storage?
hard disk
advantages of magnetic storage
-huge storage capacity
-cheapest
-data can be stored for a long period of time
disadvantages of magnetic storage
-not as portable
-slower to access data
-mechanical moving parts can be damaged
how does optical storage work?
uses laser beams to burn pits to represent data
what is an example of optical storage?
CDs
advantages of optical storage
-very portable
-inexpensive when only a small amount of data is stored
disadvantages of optical storage
-media is not as robust
-disks can be easily scratched
-slower to write than other types of media
how does solid state work?
holds data using electronic switches
what is an example of solid state?
USB stick
advantages of solid state
-very portable
-robust as there is no moving parts
-faster to access
disadvantages of solid state
-SSD are expensive
-limited number of erase/write cycles
characteristics of storage
-capacity
-speed
-portability
-durability
-reliability
-cost
