HITACHI Deskstar 5K3000 HDS5C3020ALA632 (0F12117)

For what it's worth (which isn't much, since these drives seem to be on their way out of production -- I suppose that means they'll go on the official list any day), I've been running 5 of these drives on my Pro 6 with dual parity for about 7 months. At the beginning of the week, during the weekly resync, one of the drives failed, as confirmed by Hitachi Drive Tools in my PC. Fortunately, I had just ordered two more to expand the volume and have a backup drive on hand, so I was able to replace the dead drive Wednesday night, and recovery was completely successful. I then added the sixth drive, and the expansion has also succeeded.