If you need DVD-R/DVD-RW support, ask the Author for CDrecord-ProDVD. This version of CDrecord does not include DVD-ROM support code. Driver options: BURN-Free technology. Prepare writer to use BURN free technology. Set VariRec Laserpower Laserpower to -2, -1, 0, 1, 2, 2 or 3 times. Only works for audio and if speed is set to 4.0 speed=8, 0.8 speed=burnfree.”]
Source: https://taosecurity.blogspot.com/2004/06/duplicating-data-cds-with-freebsd-i.html