For everybody who has been waiting with baited breath to hear whether or not the repair of the RAID array worked or not, it did. It took several days, but since we were away on vacation seeing my dad receive the Fleming Medal from the American Geophysical Union, the waiting was pretty easy.
To convince myself that the repair was successful, I unplugged one of the previously functional drives, and saw that all my files were still there when the array was running just on the new drive and the other previous drive. I recommend this to anybody who thinks they’re running a RAID system — until you’ve seen the RAID array work with a drive removed, how can you be sure it’s really working? If your system is set up better than mine is, you’ll get some kind of warning message too.