Experienced users understand the message.
Hardware can easily be replaced and is usually covered by insurance. Lost data is often irreplaceable and, at the very least, extremely expensive to replace manually. Tape backup is without a doubt the least expensive, most portable and most common way to protect vital data. Backing up your data is good insurance against disasters of all types. If you're unprepared and one of these disasters strikes, restoring your data can require hours of unprofitable and frustrating work.