newbie---is this normal?

[SteVe Cook]

Earl Violet wrote:
> No experience with DVDs but I found CDs seem to work better on my
> machine if burned at a lower speed.
> 
One problem I had was that some iso images would work OK and others not, 
notably Ubuntu ones, I was using some older 650MB CDs and the images 
that failed were all 680-700+MB.  They all passed mdsum tests and 
similar, but when installing from them random read errors appeared.

SteVe