About the 100% cpu usage problem, I verified I have DMA enabled.
ghost@ubuntu:~$ sudo hdparm -i /dev/scd0
/dev/scd0:
Model=PIONEER DVD-RW DVR-108, FwRev=1.20, SerialNo=
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=13395, BuffSize=64kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
AdvancedPM=no
Drive conforms to: Unspecified: ATA/ATAPI-2,3,4,5
* signifies the current active mode
and
[ 2.300301] ata6.00: ATAPI: PIONEER DVD-RW DVR-108, 1.20, max UDMA/66
[ 2.320244] ata6.00: configured for UDMA/66
[
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https://bugs.launchpad.net/bugs/702557
Title:
Error writing data DVD
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