I moved this drive to a new Vista 64 Ultimate computer, and the device buffer no longer stays full - it fluctuates between 15% and 90% rapidly…
Works fine on the old computer.
The drive is an external USB Lite-on DH20A3H (bought from costco) with the newest firmware burned… I have tried flashing to yv68 (12X rpm), with no significant changes.
replaced all cables
used same discs
deleted drive (and USB controllers) from control panel->system
disabled other dvd-roms
unplugged all other USB
installed new sptd
tried other firmware (including 12x RPM)
nothing - usually won’t burn more than 5.5X, and buffer fluctuates wildly while burning… discs still come out okay though… but not perfect