I noticed last night that one of the drives in my TeraStation NAS has failed. I don't think there was any data loss (Raid 5). I've got some other drives around the house, but this will be the first time in 28 months that I've had to crack open the Buffalo TeraStation. Considering how much we use it as a media server and for other backups, I'd say that's pretty good.
UPDATE: New drive installed & array rebuilt. Everything survived intact. YEAH!