Optical backing storage media suchas CDs and DVDs CDs tend to be used for large files (but smaller than 1Gb)which are too big for a floppy disc to hold such as music and general animation. DVDs are used to hold very large files(several Gb) such as movie films. Both CDs and DVDs are portable i.e. they can be transported from one computer to another. Both can be used to store computer data. Advantages
Can stored large files.
Light, easy to carry
Memory less than 1GB.
Most DVD players and drives can't read DVD-RAM discs.
Very few players can play in reverse at normal speed.
Applications which require the prevention of deletion of data, accidental or otherwise. CDs used by software companies for distributing software programs and data; by Music companies for distributing music albums and by book publishers for distributing encyclopedias, reference books etc. DVDs used by film distributors. Advantages
Can stored data permanently.
They are not expensive.
A CD-ROM is a storage media that has a better longevity for storing data in a moderately small space, when added to the fact that they can be stacked in a small space the amount of storage per cubic foot goes up.
Can not delete or edit saved data.
CD ROM/DVD ROM Maprang 10GM
Applications which require a single ‘burning’ of data, e.g. CDs– recording of music downloads from the Internet, recording of music from MP3 format, recording of data for archiving or backup purposes. DVDs – recording of film movies and television programs. Advantages
Light and thin
CD R/DVD R Maprang 10GM
Applications which require the updating of information and ability to record over old data. Not suitable for music recording but is very useful for keeping generations of files. DVDs have between five and ten times the capacity of CDs. Advantages
Less expensive than Blu-ray.
It generally holds about 650 mb of data or 74 minutes of audio.
Slower to write (respond)
CD RW/DVD RW Maprang 10GM
Housed in a cartridge. Used in video recorders, camcorders and computer memory. Advantages
superior quality of the discs
Less problem about formatting and finalising.
Less compatibility than DVD-RW and DVD+RW
12x media is not reportedly available in Europe
DVD-RAM media have always been more expensive than other types of DVD.
DVD RAM Maprang 10GM
Used in video recorders and computer memory as well as games consoles – main rival to blu-ray. Advantages
Cheaper price comparing to Blu-ray
Fully compatible with all features
More user/consumer friendly.
HD DVD holds a maximum of 30 GB of data, while a dual-layer Blu-ray carries 50 GB.
Expensive than a normal CD.
HD DVD Maprang 10GM
Used in video recorders and computer memory as well as games consoles. Largest storage capacity of optical media. Advantages
Light and thin.
Easy to carry.
Huge storage capacity.
Disadvantages - More expensive than HD DVD Blu-ray Maprang 10GM
Smallest form of memory, used as removable storage. More robust than other forms of storage. More expensive than other forms but can be easily written to and updated. Advantages
The random access speed for reading is faster because it doesn't need a head to read or write data.
Reading performance will be more stable because the data search doesn't depend on where the data is located.
The writing speed of a Solid State is slower compared to the conventional hard disk.
Solid state backing storage Maprang 10GM
Can store up to many Gb. Used to transport files and backup data from computer to computer. Advantages
Size is smaller than DVD or CD.
Easy to carry.
The design is more fashionable
Very easily allows you to transport documents from one computer to another.
It holds a lot more data than a floppy disk.
Disadvantages - Easily lost because it is small. Memory sticks/Pen drives Maprang 10GM
Used in digital cameras, palmtops, mobile phones, MP3 players. Advantages
Small, easy to carry around
Easy to transport data from one to another.
it holds lots more data than a floppy disk.
Most computer doesn’t have flash card devices to connect them to the computer so, we have to buy one.