[WYLUG-help] can't write cds or dvds with fc2

[James Holden]

--
Agreed. cdrecord (which I use from time to time ;-) is complaining that
it can't up its priority.

# chmod u+s `which cdrecord`

... will fix this.

It is safe to run cdrecord setuid root and in most cases you should do
so, it won't eat your hard disk. It is normally a bad idea to run
network-aware things setuid, but cdrecord doesn't interact with the
network. An alternative is to use sudo, but that runs setuid itself of
course.

k3b is a nice frontend to cdrecord and mkisofs and I suggest you use
that. People who want to burn from the command line and remain sane
usually create a wrapper script for cdrecord to include the most common
options. Mine looks like this:

#!/bin/sh
/usr/freeware/bin/cdrecord device=0,4,0 speed=32 driveropts=burnfree \
padsize=160k -v -eject gracetime=3 $1

Yes, it's a SCSI drive, limited down to 32 speed from 52. The padsize
option is to make sure that ISO images are readable on Linux kernel
versions that suffer from the iso9660 read ahead bug. If you are burning
audio tracks you should use the -pad option instead to pad the track to
a sector boundary. k3b will take care of all this for you though.

James


On Sat, 2004-10-30 at 14:52, Jim Jackson wrote:
> On Sat, 30 Oct 2004, Mike wrote:
>
> > Can anyone help me with Fedora Core 2 once again, please. I have updated
> > the system using yum, got my old problems sorted out thanks to a lot of
> > help from WYLUG-help list members. Moving on to the next one, I can't
> > burn CDs - storing .jpg images and OO.o documents -  but haven't tried
> > DVDs yet. /etc/sysconfig/hwconf correctly lists the drives as follows,
> > although I am not aware whether the entry settings are fully correct:
> >
> > -
> > class: CDROM
> > bus: IDE
> > detached: 0
> > device: hdc
> > driver: ignore
> > desc: "LITE-ON DVDRW SOHW-1213S"
> > -
> > class: CDROM
> > bus: IDE
> > detached: 0
> > device: hdd
> > driver: ignore
> > desc: "LITE-ON LTR-52327S"
> > -
> >
> > hda and hdb are both HDDs and the box is new, with HDDs formatted by the
> > FC2 install CDs.
> >
> > /boot/grub/grub.conf does not mention either drive (hdc, hdd) but then,
> > I don't think it should in FC2?
> >
> > Which other files should I be looking at and what should they contain?
> >
> > On trying to write to CD (same in either hdc or hdd) I first get a box
> > saying preparing to write to cd then I get an error box saying "error
> > trying to write to cd" with "ok" or "details" options. A click on
> > details offers:
> >
> >  cdrecord: Illegal write mode for this drive.
> > cdrecord: Drive does not support TAO recording.
> > SCSI buffer size: 64512
> > cdrecord: Warning: using inofficial libscg transport code version
> > (schily - Red Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c	1.83
> > 04/05/20 Copyright 1997 J. Schilling').
> > Linux sg driver version: 3.5.27
> > scsibus: -2 target: -2 lun: -2
> > devname: '/dev/hdd'
> > scsidev: '/dev/hdd'
> > cdrecord: WARNING: This causes a high risk for buffer underruns.
> > cdrecord: Permission denied. WARNING: Cannot set priority using
> > setpriority().
> > cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
> > cdrecord: WARNING: This causes a high risk for buffer underruns.
> > cdrecord: Cannot allocate memory. WARNING: Cannot do mlockall(2).
> > cdrecord: Continuing in 5 seconds...
> > cdrecord: Future versions of cdrecord may have different drive dependent
> > defaults.
> > cdrecord: Asuming -tao mode.
> > cdrecord: No write mode specified.
> >
>
> I think you may need to do this as root. Not sure how FC2 sets up
> cdrecord, but it looks like it might not set it setuid (run as root).
>
>
>
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> Wylug-help at wylug.org.uk
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