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System Features
Evo D310 Micro Desktop 27
• Supported DVD-ROM formats:.
• DVD-ROM
•
DVD-R (4.7GB/3.9GB)
• DVD-RW
• DVD + RW.
•
Interface: E-IDE/ATAPI, Support Ultra DMA 66.
NOTE
If a disk is still in the drive after power failure or drive failure, the disk can be reclaimed by inserting a straightened paper-
clip into the small hole at the bottom of the door.
Digital Versatile Disk (DVD) Technology
Digital Versatile Disc (DVD) is a medium for the distribution of from 4.7 to 17GB of digital data on a
120-mm (4.75 inch) disc. This huge volume of data (CD-ROMs can store 680MB) can be used to store up
to nine hours of studio quality video and multi-channel surround-sound audio, highly interactive
multimedia computer programs, 30 hours of CD-quality audio, or anything else that can be represented
as digital data.
A DVD looks like a CD-ROM: it is a silvery disc, 4.75 inches in diameter, with a hole in the center. Like a
CD, data is recorded on the disc in a spiral trail of tiny pits, and the discs are read using a laser beam. The
DVD's larger capacity is achieved by making the pits smaller and the spiral tighter, and by recording the
data in as many as four layers, two on each side of the disc.
To read these tightly packed discs, lasers that produce a shorter wavelength beam of light are required,
as are more accurate aiming and focusing mechanisms. In fact, the focusing mechanism is the technology
that allows data to be recorded on two layers. To read the second layer, the reader simply focuses the
laser a little deeper into the disc, where the second layer of data is recorded.
Not only are two layer discs possible, but so are double-sided discs. The availability of four layers is what
gives DVD its 17GB capacity.
Description
Data Capacity: Capacity DVD-ROM
Capacity DVD-RAM
Capacity DVD-R
Capacity CD
Up to 8.5 GB/side
4.7 GB/side
4.7 GB/side
650 MB
Data Transfer Rate 16
✕
(maximum) DVD
40
✕
(maximum) CD-ROM
Loading Type Motorized tray
Access Time 120 ms (DVD)
90 ms (CD-ROM)
Buffer Memory Size 512 KB
Acoustic Noise 52 dB
Rotational Speed Approx. Variable (Approx 7,300 rpm max.)