Wednesday 16 January 2013

Advantage and Disadvantage of various data storage devices?

 
Hard Disk

Advantages
*Usually integrated into the PC, very robust

Disadvantages
*Slower computer performance when full

Floppy Disk

Advantages
*Inexpensive

Disadvantages
*Very limited capacity
*Easily damaged
*Spreads viruses


CD-ROM/CD-R/CD-RW

Advantages
*Very large storage capacity
*Inexpensive
*Some types can be reused (CD-RW and CD-R)

Disadvantages
*Some older computers cannot read CD-RW media
*Some CD-R discs are 'write once', which means once data is copied across, new or additional data cannot be added

Zip Disk

Advantages
*Large storage capacity
*Disks are durable, robust and rewriteable
*Inexpensive

Disadvantages
*Requires a zip drive, which may not be integrated into the PC. If not, a stand-alone zip drive is required.

DVD
DVDs, or digital versatile discs, are predominantly used as a storage medium for movies, rather than as a general storage medium. They look and operate similarly to a CD-ROM, but they have a much greater storage capacity (up to 17GB).

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