Glad you got it working! Hope you didn't lose a lot of files on the SSD.   Windows should assign the next available drive letter to the HDD. So if it has assigned C: to the SSD, it should automatically assign D to the HDD. Once all the latest Windows Updates and all your apps are installed, you should image the SSD on an external USB HDD, using something like Macrium Reflect (free). And image your HDD on an external USB HDD drive too. You don't want to risk another problem like this again. Just keep in mind that the backup images are only as good as the last one you made, so get it habit of imaging both drives on a regular basis. Is it possible you had a malware attack? If your problem has been solved, please mark a post in this thread as the "Solution".
First thing that happened was my monitor quit working all of a sudden. So I hooked it up to my old PC and the monitor worked fine. So I started reading and cleared the CMOS on my 8930 . Hooked everything back up and the monitor is now working but now I get 'Boot failure on device'.. I just can't get back into Windows no matter what I do. I really need some help with this. My warranty is up and it cost too much to just throw it out! Help!            Thank you
XPS 8930, won't boot into Windows