I also had that strange sound coming from my Alienware 14. At first I thought it was the HDD I have. But no, to my knowledge it was it fact the CD-DVD
My quick fix was going to PC-Manage- Go to your devices - Go to CD-DVD & Disable it.
It did the trick for me. And if you are anything like me, you don't usually use the CD-DVD.
Hope this helps thanks
I have the same issue with my M14x. The eject on my internal Matshita is trigger every 3 to 5 minutes. It is loud and very annoying especially in class or at the library, and it also causes the laptop to heat up. Disabling it or uninstalling it does not prevent it from triggering the eject. Eventually it will burn itself out. To say that there isn't anything wrong with the computer is very dishonorable.