I recently purchased a SOHW-1673S 16X model DVD/CD DL burner from newegg.com. I've been having some problems with building up burning speeds.
When I burn CDs, it takes a while to build up the speed to 48X (often times the actual speed is so fast, usually around 30X, that the disc finishes burning before it hits 40X).
And when I burn 8X media DVDs, it usually takes a total of three minutes before reaching 8X. The last CD I burned, actually, topped off at 6.1X and went no higher.
I've run the KProbe app that I read about here, and the burst rate was 26 MB/s. It said that slower than 20 MB/s pointed to a DMA problem, but I don't know what the normal rate is. DMA is enabled on the drive, I'm positive of that.
Also, this was something odd. I was copying data from a DVD RW disc onto my Western Digital HD. As it was transferring, there was a small, low-tone beeping noise coming from my case. I'm not certain if it was the DVD drive or the HD, so I'm mentioning it here.
None of the files were corrupt, and it finished the copy without incident, aside from the beep.
I'm not really concerned about the build-up to burning speeds, although that topping out at 6.1X is a little annoying. I just don't want this to point to problems with the drive later.
My system is Dell Dimension 3000, running Win XP Home.