If your company is struck by a disaster, a fire, a flood, a theft or even a simple server hard disk crash, your chances of going out of business are about 40%.  You can be sure your creditors will let you know how much you owe them, and many of your customers will wait for you to call them. 

You probably have a backup of some sort, a tape, a CD, multiple CD's a USB hard disk, but is it off-site?  What happens if the employee that has the backup is suddenly unavailable after your disaster?