LH-18A1P DVD-RW - A couple of questions

I’m new in this forum and english is not my natural language. I hope you understand me in my bad english.

I have the LH-18A1P Lite ON DVD Burner and I have a couple of questions about that:

  1. I had read in this forum about hard vibrations in this model. Can these vibrations affect the recording process or to reduce the life of the DVD Burner?
  2. In CD Rewrite specifications indicates that the maximum burned speed is 32X, but Nero not allow me to choice more than 10x speed. I have tried with different CD-RW media types and GL0B, GL0F, and GL0G firmwares. How I can solve this problem?
    Thanks a lot!.