CD / DVD burning was quite a nightmare for me and my Gentoo on Inspiron 6000, since CD burning won’t go faster than 10x speed, choking the CPU at 100% utilisation, and very prune to buffer underrun, even if I just leave my favorite burning software doing it’s work without disturbance. When it comes to DVD, hmm, not a single disc was successfully burned.. 
During my stressful second attempt to make up with Ubuntu (our relationship didn’t work out anyway, I’m back with my Gentoo now) in the past 2 weeks, I didn’t get such problems with my burner. It made me wonder and found out that my burner was detected as scd0 while with my Gentoo it was hdc.
With that I came to realize that my burner is SATA based, and so enabling a SCSI CDROM support in the kernel (and disabling ATA/ATAPI support) should fix my problem.
Device Drivers --->
ATA/ATAPI/MFM/RLL support --->
< > ATA/ATAPI/MFM/RLL support
SCSI device support --->
<*> SCSI CDROM support
With the new kernel, udev assigned sr0 to the device (it’s ok not to be assigned sdc0), and CD / DVD burning is no longer a nightmare for me..
shakir@herugrim ~ $ ls -l /dev/ | grep sr0 lrwxrwxrwx 1 root root 3 Feb 5 09:50 cdrom -> sr0 lrwxrwxrwx 1 root root 3 Feb 5 09:50 cdrw -> sr0 lrwxrwxrwx 1 root root 3 Feb 5 09:50 dvd -> sr0 lrwxrwxrwx 1 root root 3 Feb 5 09:50 dvdrw -> sr0 brw-rw---- 1 root cdrom 11, 0 Feb 5 09:50 sr0
Let’s burn, baby, burn.. 
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