Optical Drives; Features Of The Cd-Rw Drive - Compaq Evo D310 Micro-Desktop Technical Reference Manual

Optical Drives

The Compaq Evo D310 Micro Desktop is available with a choice of optical drives:
CD-RW drive: 40X, 10X, 40X IDE (DLA and MyCD software from Veritas included)
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DVD-ROM drive: 16X, 40X IDE (WinDVD MPEG2 decoding software from InterVideo included)
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CD-ROM drive: 48X IDE.
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These drives can also be purchased as accessories. Refer to www.hp.com/go/pcaccessories .

Features of the CD-RW Drive

Supported CD-ROM formats:
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CD-ROM Mode-1 data disc
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CD-ROM Mode-2 data disc
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CD-ROM XA
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CD Audio disc
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Video CD
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CD-I
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CD-I Ready
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CD-I Bridge
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CD-WO
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Enhanced Music CD (CD Plus)
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Photo CD Multi-session.
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Interface type: E-IDE/ATAPI.
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Data Transfer Rate
(1 KB=2
(1 MB=2
CD-RW Technology
CD-RW drives use a technology known as optical phase-change. It does not use magnetic fields like the
phase-change technology used with magneto-optical technology. The media are generally distinguishable
from CD-R discs by their metallic grey color. The basic structure of the discs, however, is the same as a
CD-R disc but with significant detail differences. A CD-RW disc's phase-change medium consists of a
polycarbonate substrate, moulded with a spiral groove for servo guidance, absolute time information and
other data, on to which a stack (usually five layers) is deposited. The recording layer is sandwiched
between dielectric layers that draw excess heat from the phase-change layer during the writing process.
In place of the dye-based recording layer on a CD-R disc, CD-RW commonly uses a crystalline compound
made up of a mix of silver, indium, antimony and tellurium. This mix, when heated to a certain
temperature and then cooled becomes crystalline, but if heated to a higher temperature it becomes
amorphous when it cools down again. The crystalline areas allow the metallized layer to reflect the laser
light better while the non-crystalline portion absorbs the laser beam, and is therefore not reflected.
10
byte=1,024 bytes)
20
byte=1,048,576 bytes)
Description
Sustained Data Transfer Rate
Writing CD-RW - 40 = 6,000 KB/s (Max)
Writing CD-R - 10 = 1,500 KB/s (Max)
Reading - 40 = 6,000 KB/s (Max)
System Features
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