[NAME] Here is a link to an article about software tools that will show what your CD/DVD drive can read or write: [URL]  
I was reading the XPS 8940 Setup and Specifications pdf to see if the optical drive supported BD-RE DL discs. The pdf just says it reads and writes cd, dvd, & blu-ray but doesn't say if the optical drive supports dual layer Blu-Ray discs. Just wanted to know so I don't order BD-RE DL discs and find out they aren't supported.
XPS 8940, Blu-Ray drive Single or Dual Layer