SMART-X will also kick in if you are watching a movie from a CD (VCD). In this case, you don’t need the CD to be read at full speed, so SMART-X will adjust speed for optimal performance. The SMART-X function will also check for scratched CDs and slows the drive down to prevent reading errors, so it acts almost like an error detection and correction mechanism. SMART-BURN is short for Smart Monitoring & Adapting Recording Technology for BURNing. It is not just a buffer underrun protection technology, it also acts like a writing error reduction system to assure the best quality write available. LITE-ON merged media condition checks, variable writing speed strategies