The 3-2-1 backup strategy is a classic yet still relevant approach: keep three copies of data, on two different types of storage media, with one copy kept off-site.
This principle protects data against multiple risk scenarios at once — from hardware failure and ransomware attacks to physical disasters such as fire or flooding that could wipe out a single storage location.
In practice, the first copy usually lives on the production server, the second on local storage (NAS or tape), and the third in the cloud or a geographically separate data center.
What often gets overlooked is regular restore testing. A backup that has never been tested for recovery risks failing at the exact moment it is needed most.
Arvena Backup Solution service covers designing the 3-2-1 scheme, automating backup schedules, and running periodic recovery drills so the company is genuinely ready for a worst-case scenario.