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The Tuesday 2007-05-15 at 17:40 +0200, Matthias Hopf wrote:
> > and compared the sizes:
> >
> > 4700000000 image
> > 4700012544 dvd
>
> # expr \( 4700000000 + 16383 \) / 16384 \* 16384
> 4700012544
>
> Apparently, while being written, the image is expanded to the next
> multiple of 16k (might be even 32k or 64k). A single block on DVDs is
> 2048 bytes, I don't remember how big a group is (data needs to be
> written in groups due to error correction codes).
I was thinking of something in that line, though I wonder why I hadn't
noticed before. I don't know how many blocks have to be written at a time
either.
- --
Cheers,
Carlos E. R.
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