It means the device is open by something else, and therefore it won't burn. One of the things done in the final release is locking of CD/DVD-R/RW drives, so that you don't have other processes interfering with burns.
Is one of the drives mounted? Is magicdev or autorun running on the drive? How are you copying?
Well that's what I would have thought, but, like I said, fuser shows that no other process is using /dev/scd0. I even did a fuser on it when I had started the command and it shows, but nothing else. I don't know what magicdev or autorun is. I've done this same command at runlevels 3 and s just to see if it was something in KDE or Gnome. I always get the same thing. This is what I'm running...
[root@xxxxxxxx root]# cdrecord -v dev=0,2,0 speed=12 \ driveropts=burnproof -isosize /dev/cdrom
Cdrecord 2.0 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jrg Schilling TOC Type: 1 = CD-ROM scsidev: '0,2,0' scsibus: 0 target: 2 lun: 0 Linux sg driver version: 3.1.24 Error trying to open /dev/scd0 exclusively ... retrying in 1 second. Error trying to open /dev/scd0 exclusively ... retrying in 1 second.
Thanks for looking at this, dk