The differences between backup and archive are really quite simple. Often, the stumbling block to understanding the difference is the tools we've chosen to use. Up until recently, it has been possible to use backup software for archival purposes. But now, with the explosion of data in many environments, it is becoming necessary to draw distinctions between the two functions. We can't possibly archive all of the data, and we don't need to. Use your unique business requirements and the proper tools to solve your backup and archive issues.