ARRRRRHGH. That is NOT THE LESSON. I'm sorry, every time there is a discussion of hard disks and RAID, someone posts this same stupid comment. The GP comment didn't suggest that RAID == Backup. Not in any way. Your reply suggests that they did.

"RAID5 by chance?" How do you know they didn't use it? They might have had multiple failures too close together to rebuild the array.

Sorry for the caps, but I just snapped seeing this comment for the nth time and with so many upvotes.