I found information that LiteOn use (or used) different laser (including other manufacturers) units in your drives of given type. Is it true? How to recognize the optics and which are better?AK
.....Depends on the drive.Some drives used multiple OPUs, but most did not. And there was no quality difference when they used different models. The differences from drive to drive would probably be bigger, honestly.
So, which drives (currently available) have the best (reliable) optics?AK