1.1.3 Input Output devices Flashcards
Give 2 examples of optical storage devices?
CD-ROM devices
DVD devices
Give 2 examples of magnetic storage?
magnetic tape
hard-disk drives
Give 2 examples of flash storage?
Solid State Drives (SSDs)
USB Flash Drives
How do optical drives store data?
As grooves and pits
How do optical drives work?
By shining a laser at the media and processing the reflection of the media
Name 2 advantages of optical storage devices?
Cheap per GB
Portable
Name 2 disadvantages of optical storage devices?
Slow to access times
Prone to scratches
How do magnetic drives store data ?
store information magnetically represent binary information using two magnetic states: polarised and unpolarised.
How do magnetic drives work?
By having a magnetic drive head physically move over the surface of the disk .
Name 2 advantages of magnetic drives devices?
Cheap per GB
Large capacity
Name 2 disadvantages of magnetic drives devices?
Slow access times
Fragile
How do flash drives store data ?
In memory chips
Name 2 advantages of flash drive ?
Durable
Fast access times
Name 2 disadvantages of flash drives ?
Cost per GB
Limited read/writes
What does ROM stand for?
Read Only Memory