Why we keep every file twice
Archives have a simple rule: one copy is no copy. Disks fail quietly, data centres flood, and companies make mistakes. The only reliable answer is to keep each item in more than one place.
Two locations, not two disks
Every file you add to Archivistika is written to two data centres in different countries before it is marked as archived. A problem in one building never touches the other copy.
Checking, not hoping
Copies can also decay without anyone noticing. Each file gets a fingerprint when it arrives, and every year both copies are checked against it. If one ever differs, it is repaired from the other.