Re: [gentoo-user] mkisofs: layout

Andrey Moshbear <andrey.vul@×××××.com> wrote:

> On Mon, Jan 30, 2012 at 05:02, Joerg Schilling
> <Joerg.Schilling@××××××××××××××××.de> wrote:
> > Andrey Moshbear <andrey.vul@×××××.com> wrote:
> >
> >> If there a way to force mkisofs to add padding after sector N so that
> >> the resultin image can be burned as a double layer with no files that
> >> reside partially on one and partially on the other layer?
> >
> > Did you read the mkisofs man page?
>
> I did. The closest thing that was available was -dvd-video, but it
> pads all files, not just ones around a layerbreak.
> -pad only pads the end of the image.

This is not correct.....

Mkisofs honors the disk layout defined by the IFO file.


> > Why do you believe there is a problem?
> >
>
> Cdrecord burns DVD+-R DL in PTP mode, so it's going to be inefficient
> in terms of I/O if there's a file that's halfway on
> one layer and halfway on the other. Were there padding or a dummy
> file, this would not be an issue.
>
> Hence, the asking about introducing padding around a layerbreak area.

You are missunderstanding things:

The track recording direction is defined by the pressed pree-groove and cannot 
be changed.

If you are copying DVDs, you need to call cdrecord -v -atip or similar in order 
to retrieve the layerbreak value of the original disk. This value needs to be 
given with the driveropts=layerbreak=xxx option when writing DVD+R/DL.

If someone can tell me how to read the layerbreak value from the IFO file, this 
coule be done automatically....

Jörg

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