Absolutely true, my own DVD-ROM used to be a Memorex 16Maxx DVD-ROM (GWH2 firmware) Using Nero infotool, it showed that the drive would not support DVD-R nor DVD+R…
Too bad, it used to work with DVD+R
Now that it is converted to JLMS XJ-HD 163 DVD-ROM (firmware GH5Y, and I only modded the firmware to do the conversion), Nero Infotool (same version as previously) reports that DVD-R and -RW are supported, but still no DVD+R support !
Too bad once again, it still works with DVD+R
Changed old fw version to the correct one ! And beware that my old Memorex was a DVD-MAX1648 AJ, an OEM LTD-163