SB = SolidBurn = performs additional power calibration in the lead-in/lead-out area of the disc prior to the burn to fine-tune the laser power margin
OS = OverSpeed = Allows to overspeed media to higher speeds than those stored in FW … whether this is on or off doesn’t matter if you burn at the media’s rated speed only (e.g. MCC003 @ 8x)
WOPC = Walking Optimum Power Calibration = performs error checks during the burn process from time to time (can be seen in the write transfer rate graphs) to check for burn quality … WOPC will speed down the drive if errors get too high and will possibly adjust laser power output, too
All settings can be controlled via BenQ Q-Suite software.
My recommendations are:
Note that some people claim that WOPC might cause PIF spikes at the recalibration points.
SB can retrieve false results if the media (especially low-quality media) shows high quality deviation in the test areas at start and end … if SB is then falsely calibrated, the media might be written with a false laser power that could result in out-of-spec jitter values. Actually, SB can work against WOPC sometimes.
Some 8x media actually writes better at 12x so OS might be an option … but this can only be determined from case to case.