Disaster Recovery (DR)

DR restores systems and data after major outages using defined RTO/RPO targets.

Updated: 2026-03-05

Definition

Disaster Recovery (DR) is planning and procedures to restore critical services after major incidents like outages or ransomware.

DR objectives are often defined by RTO (time to restore) and RPO (acceptable data loss).

Key points

RTO = time to recover
RPO = data loss window
Requires tested plans and backups/replication

Common mistakes

Having DR documents but never testing them.
Not aligning DR targets with business needs.

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