Test write is traditionally a way to understand what "real life" maximum burning speed you can achieve on a given system. There are a lot of factors affecting these, and expecially with relatively slow buses and actual CD/DVD burners without a big cache or other form of overflow correction, it was quite normal to have a coaster as a result. The test is meant as a simultaion to measure actual data transfer speed available. In any case burning a bootCD at "maximum" speed is not a good idea, even today. For CD, lowest possible speed is advised. For DVD, medium speed seem to be better. jaclaz I'm not entirely sure where this "slow is better" mantra came from... Modern drives have write strategies tuned for high speeds. Want to test it out, have a Lite-On burner? Grab KProbe, make some test burns, and scan for C1/C2 errors. As long as you have low C1 errors and no C2 errors, you have essentially a perfect burn... which is easily attainable with TY media and a good burner, even at high speeds (40x+). My advice for good burns: Buy good media (ex: Taiyo Yuden CD-R/DVD±R, Verbatim DVD±RW), use quality drives (Plextor, LiteOn). // I use nero to make a bootable cd, never used nLite to make or burn an ISO... and have never had a problem.