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    Tuesday, January 18, 2011

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    File Compression

    The process of transforming information from smaller representation from which the original, can be retrieved. Encoding and decoding are often used to describe the compression and decompression processes. It has important applications in the areas of data storage and data transmission. Other than compression savings, other concerns include encoding and decoding speeds and workspace requirements, the ability to access and decode partial files, and error generation and propagation.



    Head Crash

    A head crash is a hard-disk failure that occurs when a read–write head of a hard disk 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

    Its main purpose is to offer a gateway of accessing your computer files (pictures, documents, music, videos, etc.) from any computer, as long as that computer has access to the Internet. 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

    It is a disk 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 discs. Some drives can only read from discs. However, recent drives are commonly both readers and recorders. Recorders are sometimes called burners or writers. Common types of optical media include compact discs, DVDs, and Blu-ray discs which can be read and recorded by such drives.

     


    Solid-State Storage

    It is a data storage device that uses solid-state memory to store persistent data. SSDs are distinguished from traditional hard disk drives (HDDs), which are electromechanical devices containing spinning disks and movable read/write heads. On the other hand, SSDs use microchips which retain data in non-volatile memory chips and contain no moving parts. SSDs are typically less sensitive to physical shock, quieter, and have lower access time and latency. They use the same interface as hard disk drives, thus easily replacing them in most applications.

     

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