icrude001,
When you burn a DVD (or a CD, for that matter), your drive spins it up only enough to be able to write to it at the chosen speed. And, any drive will
always write considerably slower than it can read.
When your drive
reads a DVD, on the other hand, it will spin it up to the point where the transfer speed is appropriate for the bus to which the drive is connected. In other words, it will spin it much faster when reading than when writing.
Now, optical drives do make a good bit of noise when they spin a disk up; this is normal. The question is, is this a "normal spin up" noise, or is it something you need to worry about? The best way to find out would be to try some other, already written, disk in your drive. A commercial DVD would be fine, or maybe a game DVD. Is the noise produced by one of these when they are being read significantly different than that produced by your "printable" DVDs?
Scott