1) PCI - 2 port sata board (Ali m5283 chipset)
2) NEC-2510A (Maddog 2.F8 firmware, 2.F9 does not have Ritek D01 support!)
3) Memorex +R DL (Ritek D01)
My first burn turned out to be an expensive coaster but i later found out that my DVD-writer's firmware did not support the media. I upgraded the firmware (well downgraded in my case because the newer firmware did not support this media for some odd reason), and the second burn was quite successful. It seems like a lot of people are complaining about MEMOREX dual layer media, but I believe its that there current firmwares or dvd-writers are not supporting it. Upgrade your firmware and then try the burn again. Also double check on the web which firmwares (orignal or modified) will support your dual layered media.