Yes. Another Backup Lecture.

Daring Fireball: An Ode to DiskWarrior, SuperDuper, and Dropbox

Hard drives are fragile. Read as much as you can bear to about how they work, how incredibly precisely they must operate in order to cram so many bits onto such small disks. It's a miracle to me that they work at all. Every hard drive in the world will eventually fail. Assume that yours are all on the cusp of failure at all times. It's good to be spooked about how long your hard drives will last.

John's article, advice...