A couple times a year I hear from a friend, or client, or relative, that they have lost all their photos, or music, or everything because of a hard drive failure. I can't think of a case where any of these people ever had a back-up. I understand the value and importance of backing up and I often find myself encouraging people to employ some sort of back up system. Especially with my clients, who I often end up talking about cameras and picture storage, I find that nine out of ten people don't back up at all. Tales of hard drive failure are comparatively rare. In my own experience, over the past twenty years, I have had one internal hard drive failure back in 1995 in a Mac 660av. It suffered some sort of mechanical failure and I had the drive replaced and reinstalled what I had backed up from a few dozen floppy disks! So all of this brings me around to a question about backups. How common are failures? The way people talk about RAID 1, RAID 0 and back-up strategy, suggests that these sorts of failures are somewhat more common than I have experienced. Does it make more sense to spend days planning a back-up strategy, or a day or two restoring if a failure comes? I'm wondering what strategy ends up saving the most time in the end.