How to interrogate optical discs

[Robert G. (Doc) Savage]

On Tue, 2010-06-15 at 18:47 -0400, Tom Horsley wrote:
> On Tue, 15 Jun 2010 17:07:13 -0500
> Robert G. (Doc) Savage wrote:
> 
> > If there really is overhead and other data being added, we'd like to
> > know as accurately as possible the size of that added amount.
> 
> I think it depends entirely on how many directory entries it
> needs to make, etc. I don't think there is any way to predict
> it. I suspect if you want to minimize ununsed space on a DVD
> you may have to build an image you think will fit, discover it
> is too big, remove a file and try again till it fits.
> 
> Maybe the iso image tools should have an option to do everything
> except actually write the data to the image so you can iterate
> without taking up as much time (maybe they do have such an
> option already - I haven't looked :-).

Tom,

The number of directory entries in Everything isn't that large (13). In
contrast, my Cygwin repo has 3300. I'd think there would be a very exact
formula for computing directory space. No?

--Doc