Re: Multisession DVD creation problem.

[Joerg Schilling <Joerg Schilling fokus fraunhofer de>]

??????? ??????????? via brasero-list <brasero-list gnome org> wrote:

> > ./cdrecord -version
> Cdrecord-ProDVD-ProBD-Clone 3.01 (x86_64-unknown-linux-gnu) Copyright
> (C) 1995-2015 Joerg Schilling
> >

This is very old. The recent version is 

cdrecord/OBJ/i386-sunos5-cc/cdrecord -version
Cdrecord-ProDVD-ProBD-Clone 3.02a10 2018/05/14 (i386-pc-solaris2.11) Copyright (C) 1995-2018 Joerg Schilling

It contains e.g. a workaround for a recently introduced DMA bug in the linux 
kernel if you call "cdrecord scgopts=ignore-resid ....". This may be needed 
e.g. if your drive is connected via USB.

Check http://sourceforge.net/projects/schilytools/files/ as mentioned in
recent man pages.

> > ./cdrecord -v -atip
> Cdrecord-ProDVD-ProBD-Clone 3.01 (x86_64-unknown-linux-gnu) Copyright
> (C) 1995-2015 Joerg Schilling
> TOC Type: 1 = CD-ROM
> cdrecord: Insufficient 'file read' privileges. You will not be able to
> open all needed devices.
> cdrecord: Insufficient 'file write' privileges. You will not be able
> to open all needed devices.
> cdrecord: Insufficient 'device' privileges. You may not be able to
> send all needed SCSI commands, this my cause various unexplainable
> problems.
> cdrecord: Insufficient 'memlock' privileges. You may get buffer underruns.
> cdrecord: Insufficient 'priocntl' privileges. You may get buffer underruns.
> cdrecord: Insufficient 'network' privileges. You will not be able to
> do remote SCSI.
> cdrecord: Permission denied. Cannot open '/dev/sg0'. Cannot open or
> use SCSI driver.
> cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
> cdrecord: For possible transport specifiers try 'cdrecord dev=help'.
> >
>
> Both complaint for lack of root rights.
> Doy you want me to run them as root?

You did not install cdrecord correctly.

-       In order to be able to correctly use SCSI Pass through on Linux, you 
        need special privileges. Note that for this fact you get frequently 
        false claims from so called "Linux experts" (including Mr. Torvalds).
        Even if it seems that it works without special privileges, you may get
        an automatic fallback to a dumb mode that avoids important SCSI commands
        because cdrecord is not privilleged to send the best needed SCSI 
        commands.

-       cdrecord has been audited for being safe against security issues when 
        installed as suid root since very long time (~ 23 years).

-       Now that even Linux supports fine grained privileges, cdrecord is also
        able to use fine grained privileges without being root. To learn how to 
        install cdrecord/cdda2wav/readcd for this purpose, read the file AN-3.01

> I'll try now to create a multissesion.

This works with DVD- media type with cdrecord. This does not work with DVD+ 
media.

I recommend to use a DVD- for testing purposes. You can make it reusable if you 
call:

        cdrecord blank=fast

or
        cdrecord blank=all

Jörg

-- 
 EMail:joerg schily net                    (home) Jörg Schilling D-13353 Berlin
    joerg schilling fokus fraunhofer de (work) Blog: http://schily.blogspot.com/
 URL: http://cdrecord.org/private/ http://sf.net/projects/schilytools/files/'