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From: transkawa on 5 Jul 2010 08:47


is it possible for one to find a dvd burner for desktop pc or laptop
that should burn at least at 50mb/s?
I envision one that should be external to the desktop, to remove much
workload in writing from the processor??? i really don't know a thing
about this sort of equipment.
can anyone help me? it should be something that doesn't emit health
damaging radiation also.
TIA
xnt

--
happy are those who have endured
for they shall reap bountifully
--the gospel according to an avatar
From: ferroburak on 6 Jul 2010 09:42

Dvd writers are faster than that I guess.


From: Paul on 7 Jul 2010 15:22
transkawa wrote:
>
> is it possible for one to find a dvd burner for desktop pc or laptop
> that should burn at least at 50mb/s?
> I envision one that should be external to the desktop, to remove much
> workload in writing from the processor??? i really don't know a thing
> about this sort of equipment.
> can anyone help me? it should be something that doesn't emit health
> damaging radiation also.
> TIA
> xnt
>

Look at the available media first.

For example, I see 16x DVD+R.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817130073

In this article, 1x equals 1.35MB/sec. 16x is 21.6MB/sec. If
you can't find faster media, that would be a limitation right there.

This burner is rated 24x or 32.4MB/sec. But you'd need
media to match that speed, to get a benefit.

http://www.newegg.com/Product/Product.aspx?Item=N82E16827136187

In this article on Bluray technology, there is a burner
rated at 12x. According to the article, that is 54MB/sec.
But the media I can easily see for sale, is only 6x.

http://en.wikipedia.org/wiki/Bluray

Other important things to remember, are that burners
can be CAV or CLV, and that makes a difference to the
write rate, across the media surface.

http://en.wikipedia.org/wiki/Constant_angular_velocity

http://en.wikipedia.org/wiki/Constant_linear_velocity

"A ZCLV recorder rated at "52X", for example, would
write at 20X on the innermost zone and then progressively
step up to 52X at the outer rim."

So if you think you're actually going to see those
kind of write rates, on real media, in real situations,
you'd be delusional :-) Optical media always ends up being
slower than you'd expect.

You could run burners in parallel, to increase the apparent
performance. That would require, say, backing up four hard
drives, as four independent backup sessions, such that
there is no relationship between what the four burners are
doing. As far as I know, no one has a scheme for doing
"RAID 0" using DVD burners :-)

Paul
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