Making an ISO fails

Vulpes Velox kitbsdlists at
Sun Feb 8 10:41:38 PST 2004

On Sun, 8 Feb 2004 06:44:50 -0800
"Loren M. Lang" <lorenl at> wrote:

> I have been trying to make an iso of some dvds, an cdroms by just
> copying the file /dev/acd0c, but most of the time it seems to fail
> with an i/o error.  I underestimated the size of a 6G dvd and ran
> out of disk space before it was through, though it got to nearly 4G.
>  After
> freeing enough diskspace an trying again I couldn't copy more than
> several hundre megs before it got an i/o error.  Removing and
> reinserting the dvd doesn't seem to help.  I can successfully copy
> the dvd by mounting it and copying all the files, but I'd prefer a
> straight copy of the iso image.  I've had various problems doing so
> with different cd/dvds, and I also had a similar problem on linux. 
> Since some cd/dvds work fine, and I can always successfully read it
> when it's mounted, why don't all cd/dvds allow a straight copy of
> the iso image?

How have you been trying to copy it?

AFAIK dd should work with out any probs.

More information about the freebsd-questions mailing list