CD-R burning from drive to drive with SuSE Linux 7.3
On a system with a SCSI DVD-ROM drive and an IDE CD-RW drive I try to burn from the DVD-ROM drive directly to the CD-RW drive. With no luck. I am trying to do the same thing that works on other systems with the same setup: find the the burner drive with 'cdrecord -scanbus' and insert it into the line cdrecord -v [burner-drive] speed=1 -isosize [source-drive] On this system it becomes cdrecord -v dev=2,0,0 speed=1 -isosize /dev/sr0 I cannot do this as a regular user on this system. The message is: david@dt:~> cdrecord -v speed=4 dev=2,0 -isosize /dev/sr0 Cdrecord 1.11a05 (i686-suse-linux) Copyright (C) 1995-2001 Jörg Schilling TOC Type: 1 = CD-ROM cdrecord: Operation not permitted. WARNING: Cannot do mlockall(2). cdrecord: WARNING: This causes a high risk for buffer underruns. cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler cdrecord: Permission denied. WARNING: Cannot set priority using setpriority(). cdrecord: WARNING: This causes a high risk for buffer underruns. cdrecord: Operation not permitted. shmctl failed to lock shared memory segment david@dt:~> If I su to root and issue the same command, the usual startup-messages appear, but no real burning takes place when it should start. I just see this message: Waiting for reader process to fill input buffer... And the source-drive spins up and down forever. Burning from ISO-images to the CD-RW drive works fine. What could the problem be? TIA Best regards, David List
David List wrote:
On a system with a SCSI DVD-ROM drive and an IDE CD-RW drive I try to burn I cannot do this as a regular user on this system. The message is: david@dt:~> cdrecord -v speed=4 dev=2,0 -isosize /dev/sr0 Cdrecord 1.11a05 (i686-suse-linux) Copyright (C) 1995-2001 Jörg Schilling TOC Type: 1 = CD-ROM cdrecord: Operation not permitted. WARNING: Cannot do mlockall(2). cdrecord: WARNING: This causes a high risk for buffer underruns. cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler cdrecord: Permission denied. WARNING: Cannot set priority using setpriority(). cdrecord: WARNING: This causes a high risk for buffer underruns. cdrecord: Operation not permitted. shmctl failed to lock shared memory segment david@dt:~>
That's normal. cdrecord uses a kernel function which is only available for root (to better avoid buffer underruns). If it was available for all users this would by a security leck... Because this function can be used to crack the system if you use it intelligent... If you want to burn as normal user to it like man cdrecord describes: - Create new group burn - All users allowing to burn write into this group - chmod root.burn /usr/bin/cdrecord - chmod 4710 /usr/bin/cdrecord This was it. Log out, log in and you'll be able to burn...
If I su to root and issue the same command, the usual startup-messages appear, but no real burning takes place when it should start. I just see this message: Waiting for reader process to fill input buffer... And the source-drive spins up and down forever.
.. if that won't happen. I do not know how to help here...
Burning from ISO-images to the CD-RW drive works fine.
... but this then should work as user. Rene
participants (2)
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David List -
Rene Engelhard