Good news! I managed to recover the first draft of Iron Angels, along with the majority of my other files, from my previous, damaged hard drive. That means that I have all those thousands of words just waiting for revision rather than having to start from scratch.
Of course the question now becomes, what do I do with them? Should I finish out the first draft of Iron Angels, or continue with my second draft rewrite of the story? I think I am leaning towards the rewrite option, if only because I am planning on changing the story quite a bit at the beginning, and the ending will need to reflect those alterations. Plus, I've already started it, so there's that too.
In any case, it isn't lost forever! Huzzah!