3-2-1-1-0, ransomware survivability
3-2-1 was right for 2008. 2026 needs 3-2-1-1-0: three copies, two media, one off-site, one immutable air-gapped, zero errors in the last restore test. The minimum viable backup posture for an EU SMB, mapped to DORA / NIS2 / ISO 27001.
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