As the number of places where we store data increases, the basic concept of what is referred to as the 3-2-1 rule often gets forgotten. This is a problem, because the 3-2-1 rule is easily one of the most foundational concepts for designing data protection. It’s important to understand why the rule was created, and how it’s currently being interpreted in an increasingly tapeless world.
What is the 3-2-1 rule for backup?
The 3-2-1 rule says there should be at least three copies or versions of data stored on two different pieces of media, one of which is off-site.
