Comment 37 for bug 31709

dmesg |grep DMA:
[ 4.048473] ata2.00: ATAPI: HL-DT-ST DVDRAM GSA-T40N, JQ01, max UDMA/33
[ 4.048484] ata2.00: WARNING: ATAPI DMA disabled for reliablity issues. It can be enabled
[ 4.048491] ata2.00: simplex DMA is claimed by other device, disabling DMA

I can confirm that no-DMA bug in the forum-link, but the workaround did not fixed it. :-(