Always fully diagnose the problem...

My replacement hard drive arrived today, and I opened the case on my Mac Pro, pulled out the drive sled, screwed the drive on, and tossed it back in... I opened up Disk Utility since I wasn't getting the usual pop-up to initialize the disk, and I see what I should have seen last week...


That's right... figuring out which hard drive had failed was as simple as loading up Disk Utility and having it stare me in the face. What I still don't understand, though, is the S.M.A.R.T. status of that drive still checks out as "verified" and does not throw up an alert. Why is this? This SMARTReporter app in my menubar isn't quite so useful if it doesn't alert me of something like this, now is it?
Well... at least now I know my RAID is secure and does what I wanted it to do- protect my home folder in case a drive fails by having a mirrored copy of it. I placed an order for a replacement 1TB drive and hopefully that'll be here in the next day or so and I can get this all behind me once and for all...