Having a good backup system and process is critical, but what happens if data is lost? A 2007 Harris study revealed the following:
38 percent of data loss is due to drive failure, 30 percent of that is due to drive read issues due to corrupt or degraded media
13 percent due to corruption due to software or viruses
12 percent due to human error
Of course, this doesn't include fire, water damage, physical destruction, electrical destruction and theft. Other studies indicate of all data losses, only 80 percent of recovery is possible in most cases.