A sudden, unplanned event that causes great damage or loss. In IT, a disaster is an event that causes a service interruption of such magnitude that it cannot be resolved through standard incident management processes and requires the invocation of a continuity plan.
Disasters (whether cyber-attacks, natural events, or human error) test the resilience of an organization. Failure to recover can lead to bankruptcy.
We don't believe in "Disasters"; we believe in Unplanned Tests. Every failure is an opportunity to prove your architecture's resilience. If you design your systems to survive the loss of an entire data center (Zone Redundancy), a "disaster" becomes just another automated failover log entry.