Re: [Libcdio-devel] can files in UDF be fragmented?

[Rocky Bernstein]

As the header in include/cdio/ecma_167.h  suggests, the code should be
following the ECMA-167 specifications, 3rd edition, June 1997.  A URL for
the PDF is given:
http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-167.pdfand
that still works.

Section 4 has information on how files are laid out.  I don't see the
guarantees, you are looking for, but you should read it yourself.


On Thu, Oct 21, 2010 at 2:02 AM, Shaya Potter <address@hidden> wrote:

> I'm just wondering if a file in a UDF file system can be fragmented?
>
> i.e. if I know the start block of a file is X and that the files is Y
> blocks long, am I guaranteed that the file is then stored from X->X+Y-1?
>
> from reading the code, it seems that's what the code assumes, but don't
> know 1) if my reading of the code is correct and 2) even if my reading is
> correct, if it's possible for the code to be wrong (just in practice doesn't
> impact much?)
>
> just wondering, as i'm mostly reading the disk straight, not through
> libudf, just using it to get where I believe the file is delimited, but
> wondering if my assumption of non fragments is correct.  Mostly brought
> about by a a DVD that I see that has a bunch of 0 length files located in
> what I'd assume to be the location of a longer file.
>
>