It was reported in our local newspaper recently that a jogger was killed when a limb fell on him as a homeowner cut the limb from a tree. I hope he had good insurance for his family's sake. A disaster recovery plan for your computer systems is similar to insurance. You can't have too much. Blackouts, floods, viruses, hackers, unauthorized people doing something to or on the system that they should not do, corrupted files, equipment failure, etc.
Disaster recovery is more than a backup.
It is being able to quickly and efficiently put back into place the exact same information and configuration on each machine that was lost. Backups Hard drive capacity has become so inexpensive now that some people do not take the time and effort to have a plan in place to insure a good, 'rebootable' copy of all important data and to carry out that plan regularly. Backup plans can vary from simply copying the files to another hard drive, making a backup disk of important files, having a tape backup and using that one, two, or three times a week, all the way to having backup tapes and storing them 'off premises' in a secure area such as a bank lockbox and testing the backups regularly to ensure that it is bootable. Acumen takes this seriously. Individual's responsibilities vary according to the job.