We have 3 layers of protection for all of our weddings images. First, we have what is called a RAID 10 system, which copies every wedding on a separate hard drive from the computers main hard drive. So should the main hard drive fail for any reason, we have another hard drive with an exact copy of the information from the main drive.
Secondly, we also have remote backup. With this all of our weddings are sent via the Internet to an off site location where they are backed up. So should any of our equipment become damaged or stolen we would be able to retrieve all of our wedding from this site onto a new computer system.
Finally, all of our weddings are also backed up onto a DVD, so we will always have a physical copy of each wedding.