3-2-1 Backup Rule

A standard approach that provides 3 copies (including production as one) on 2 different media with 1 copy held at an offsite location.

While this is a common approach, there are variants.

  • 3-1-2. One production copy with two backup copies, one media type (disk), and two geographically separated offsite copies 
  • 3-2-2. One production copy with two backup copies, two different media types, and two geographically separated offsite copies 
  • 3-2-3. One production copy with two backup copies, two different media types, and three offsite copies two of which are geographically separated
< | > A
Enter your search query for glossary: