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Storage Devices - Coggle Diagram
Storage Devices
DVD ROM
Adv of
Has a faster access time than the internet
Cheap to produce and replace
Less waste of paper than using a book
Can't delete data from it
HAs faster transfer rate than floppy disk
Shows video and sound unlike a book
Portable media
Disadv of
Difficult to highlight or annotate text
Limited in the amount of space it stores than Internet
Chaeper DVD's need to be stored carefully
Slower transfer rate than Hard Disk
The media can be unreadable if scratched
Requires a PC to run it
Uses of
Used to distribute games
Used to store series of video files
Used to store reference(encyclopedia) books with multimedia content
Transferring files from one PC to another
used to distribute software
Types of
DVD-R
Once data is written it can't be erased
DVD-RW
You can write data on it and then erase it
Information
Optical Storage Medium
Type of access= Direct/Random
Digital Versatile Disc
Can hold 8.5gb of data(usually 4.7gb)
CD ROM
Adv of
Has faster transfer rate than floppy disk
Shows video and sound unlike a book
Portable media
Optical media is cheaper to buy than magnetic media
Disadv of
Difficult to highlight or annotate text
Limited in the amount of space it stores than internet
Requires a PC to run it
Slower transfer rate than Hard Disk
Cheaper CD's need to be stored carefully
The media can be unreadable if scratched
Uses of
Used to distribute games
Used to store audio mp3 files
Used to store reference books
Transferring files from one PC to another
used to distribute software
Types of
CD-R
Once the data is Witten it can't be erased
CD-RW
You can write data on it and then erase it.
Information
Can hold 700mb of data
Type of access= Direct/Random
Optical Storage medium
DVD RAM
Adv of
Suitable for archival(long-term) storage
Very fast access of smaller files on the disc
Reliable writing of discs
Holds more data when using Double sided discs than dual-layer DVD+RW and DVD-RW
Can be rewritten over 100,000 times
Has write protected tabs to prevent accidental deletion
Long life-without physical damage
Disadv of
DVD-RAM media was initially(and remains) more expensive than other DVD types.
DVD-RAM writing will be slower than DVD+RW and DVD-RW
Less compatibility than DVD+RW and DVD-RW
Used in computers,camcorders, video game consoles and CCTV applications
Blue Ray Disc
Adv of
Gaining a lot of popularity
Created to last longer and resist scratching
Holds more data than CD/DVD/HD DVD and Solid state devices
Disadv of
More expensive to produce than other optical storage devices
It takes a while for the disc to load
Information
Type of access=Direct/Random
Can store around 200gb of data on each disc
Optical Storage medium
Optical storage vs Fixed Hard Disk
Adv of
Less likely to spike
Cheaper to buy
More portable
Disadv of
Can be more easily lost
Can be more easily stolen
Slower transfer rates
Can be more easily scratched
Limited capacity
Slower access time