how combo drive differtiate between cd and dvd ?

gb5

this i have asked to many person ,but no one gave me satisfactory answer. can u give the answer.
how combo drive differtiate between cd and dvd ?

WEBMASTER

You mean a hardware CD/DVD reader?

How it can detect the difference?

I guess the laser reads the inner parts of the CV/DVD
to identify if it is a DVD or CD. That is not that difficult to
do I guess. The readers can read out from the CD/DVD the
manufacturer and I guess there's some info about type as well.


Tore Nestenius
[blue][italic][b]/WEBMASTER[/b][/italic][/blue] Programmers Heaven

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