1.5 - Storage Flashcards
1
Q
What types of storage medium are there?
A
- magnetic (hard and floppy discs, DAT tape)
- optical (CD, DVD, Blu-ray)
- solid state (USB sticks and flash memory)
2
Q
Strengths and weaknesses of hard discs
A
Str:
- robust
- extremely reliable
- large storage capacities
We:
- slow
- can crash
3
Q
Strength and weaknesses of floppy discs
A
Str:
- cheap
- easy to transport
W:
- not reliable
- small capacity
- easily damaged
4
Q
Strengths and weaknesses of DAT tape
A
Str/
- large storage capacity
- portable as it is small
We:
- slow to write and retrieve data
- less reliable than hard drives
5
Q
Strengths and weaknesses of optical storage
A
Str:
- CD-R & DVD-R can back up files
- CD-RW & DVD-RW can be reused
W: CD-ROM can only be read so no further data can be written
6
Q
Strengths and weaknesses of flash memory
A
Str:
- portable
- large capacity
W:
- can easily be damaged
- can easilt be lost
- expensive
7
Q
What to think about when choosing a storage device
A
- need for re-writing
- size of device
- speed of recovery of data
8
Q
Example of storage medium and device
A
Medium: DVD
device: DVD rewriter
9
Q
Adv and disadv of magnetic tale
A
Adv: large storage capacity
-cheap
Disad: access time is slow
10
Q
Advantages and disadvantages of online storage
A
Adv
- access data anywhere
- easy sharing
- safe from being physically damaged
Dis:
- can be hacked and lose data
- have to have an internet connection
11
Q
Why does data need to be stored?
A
- programs and data for future use
- transferring data to another location
- archiving and backup
