3-2-1-Backup-Prinzip (EN)

3-2-1-Backup-Prinzip

The 3-2-1 backup principle is a proven strategy for ensuring data integrity. It states that you should keep three copies of your data on two different storage media, with one copy stored at an external location. This method protects you from local failures such as hardware defects, theft, or disasters, as not all copies can be affected simultaneously.

Architecture

flowchart TD     A[Original Data] --> B[Copy 1
Local, primary]     A --> C[Copy 2
Local, secondary medium]     A --> D[Copy 3
External location] 

In Context

• Typically used together with versioning and automated backup systems
• Related to: Disaster Recovery, RTO/RPO, Backup Strategy
• Example use cases: Corporate databases, creative projects, personal photo collections