Monday, January 17, 2011

Secondary Storage

File Compression


File compression is the practice of packaging a file or files to use less disk space. The File Compression category includes software programs that will archive your files and extract archived files such as ZIP and RAR files. Many products in this category let you manage files and protect them with encryption. Notable titles include WinZip, WinRAR, and 7-Zip.





Head Crash


 
 
A head crash is a hard-disc failure that occurs when a read-white head of a hard disc drive comes in contact with its rotating platter, resulting in permanent and usually fatal damage to the magnetic media on the platter surface.





Internet Hard Drive


The sole purpose of an Internet hard drive is to offer a means of accessing your computer files (pictures, documents, music, videos, etc.) from any computer, as long as that computer has access to the Internet. Similar to depositing money into your bank account, and later withdrawing that same money from any ATM machine, an Internet hard drive will allow you to "deposit" your computer files into a remote hard drive, and then later access those very same files from any other computer.


Optical Disc Drive

An Optical Disc Drive(ODD) is a disc drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical disc. Some drives can only read from discs, but recent drives are commonly both readers and recorders. Recorders are sometimes called burnersor writers. Compact discs, DVDs, and Blu-ray discs are common types of optical media which can be read and recorded by such drives.



Solid-state storage



Solid-state storage is a nonvolatile, removable storage medium that employs integrated circuits (ICs) rather than magnetic or optical media. It is the equivalent of large-capacity nonvolatible memory. Examples include flash memory, Universal Serial Bus (USB) devices and various proprietary removable packages intended to replace external hard drives.

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