VCD dan DVD

CD media is no longer strange stuff. Many people who often play with the pieces of CDs for various purposes. There is a photograph in the studio and the photos stored on CD, some songs make the album and the results are stored on the CD, there is also a film and the results are also stored in the CD fragment. Tools for recording CDs more affordable price. Less than ½ million we can buy a CD recorder or more commonly known as a CD Writer. CD fragments were much cheaper price than the diskette. With a price around 1500 to 2500 rupiah we've got a magic plastic discs.
In addition, since the discovery of the DVD format, experts began thinking about how to make a recorder that can be used by everybody like a CD-Writer which has mushroomed everywhere. DVD that we usually encounter everyday such as DVD-Video and DVD-ROM it was made with molding process plant. Data or information has been entered immediately when a DVD disc printing. Such processes require special equipment was very expensive if used for personal purposes. DVD display devices can be very cheap, if you had intentionally engaged in manufacturing DVDs each day to print millions of DVD discs. That's why the DVD recorder is created that can be used for personal purposes (personal). The first time this tool to create, the large companies who are members of the DVD Forum did not really find a consensus about the rules or regulations about DVD recorders and media.
CD (Compact Disc) and DVD (Digital Video Disc) is now commonly used worldwide as a reliable standard equipment. CDs can be easily carried and can even save data. In general, the definition of a CD-ROM (Compact Disc Read Only Memory) is a medium for storing data or other information in a very large number (over 600 megabytes). Much greater if we compare it with the floppy disk (1.4 MB). CD ROM can be accessed and read on the screen, or printed from any computer with a CD-ROM player. CDs can store information in various forms, such as text, images, presentations, slides, audio and video.
DVD is Digital Versatile Disc, which means that Versatile is "versatile." DVD that we usually encounter everyday such as DVD-Video and DVD-ROM it was made with molding process plant. Data or information has been entered immediately when a DVD disc printing. Such processes require special equipment was very expensive if used for personal purposes. DVD display devices can be very cheap, if you had intentionally engaged in manufacturing DVDs each day to print millions of DVD discs. That's why the DVD recorder is created that can be used for personal purposes (personal).
Optical Disk

Disk is a circular disc made of metal or plastic coated with a material that can dimagnetisasi.
The data recorded on it and can be read from the disk by using the coil pengkonduksi (conducting coil) is called head
In the writing operation, an electric current in the head memagnetisasi disk.
On read operations, the magnetic field on the disk that moves under the head produce an electric current in the head.
During the reading and writing operations, the head is stationary while the disk moving underneath.
Disk is a circular disc made of certain materials (metal or plastic) with a surface coated with material that can be in the magnetization.
Mechanism of read / write heads read or write using the so-called head,
is komparan pengkonduksi (conducting coil).
Physical design, the head is stationary while the disk rotates according to its control.
Two methods of data layout on disk, ie constant angular velocity and multiple zoned recording
Disks are organized in the form of rings - concentric rings called tracks
Each track on the disc are separated by a gap (gap: preventing or reducing
reading or writing errors caused by interference melesetnya head or magnetic field)
Same number of bits that would occupy the tracks - tracks that are available
Getting into the disk, the density (density) disks will be getting bigger
Data sent to this memory in the form of blocks, the blocks are generally smaller than the track capacity
Block - block of data stored in the disk-sized blocks, called sectors
Track is usually filled with some sectors, typically 10 to 100 sectors per tracks Layout and Reading