Hi Frank, well no worries. This happens to all of us. As far as I can
tell the output looks good the controller side seems to be limited to
UDMA/100 while the drivers claim UDMA/133 and UDMA/66. So finally the
100 is used for the disk and 66 for the DVD drive. Don't worry about the
"sd driver needs update" message. Its only a nag message to developers.

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LG GSA-4167B (DVD drive): DMA doesn't work
https://bugs.launchpad.net/bugs/136506
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