BluRay burner Samsung SE-506CB with HighSierra/Mojave
Found a few people having suddenly problems with this burner. I am was using it mainly as a reader. As of High Sierra could no longer use it. No discs could be read. A dreadful ' the disc you inserted is not readable by this computer' message was displayed.
However, after some testing I found that when MBP is booted with the Samsung plugged in, the unit is coming alive. It reads and mounts the AudioCD's I want to import in iTunes.
If it is unplugged and plugged back again - bad luck, it no longer reads the disks.
I did a test with a BD disk - same behaviour. Reboot with unit plugged - the BD is mounted and I can browse its contents ( did not test playing a movie as I have no software installed for that). Plug off/on again and bum, disc is no longer readable.
I am no expert but it looks some USB conflict is affecting the plug and play capabilities of the unit.
Hope this workaround will help somebody.
Cheers.