Well, I popped the champagne too soon. When I bought this Dell laptop, I configured a dual-boot Win7/Ubuntu hoping to use VirtualBox (4.2.0) rawdisk access to access the other partition when running. As time progresses, I'm using Windows more frequently, so I'd be content to occasionally access the Ubuntu partition. After several attempts over several months, I have been unable to get the setup to work. Last week, however, I successfully created a vmdk rawdisk access file, and booted ubuntu from VirtualBox. It was awesome.