To efficiently recover a critical database after a power outage: 1. Assess the Damage: Check system logs and the database status to identify the extent of corruption. 2. Restore Backups: Use the most recent valid backup to restore the database. Ensure backups are uncorrupted. 3. Apply Transaction Logs: Replay transaction logs to recover changes made after the last backup. 4. Run Repair Tools: Use database repair utilities to fix minor corruption without data loss. 5. Perform Integrity Checks: Verify database consistency post-recovery. 6. Prevent Future Outages: Implement UPS systems and regular backup testing to avoid repeat scenarios.

Preparation for a Database Outage or a disaster is a must for any critical environment that cannot take downtime. The preparation can be in the form of (1) Redundant backups with continuous archiving of transaction logs, (2) DR or Standby environments in another region located at a different geographical location, and (3) the tested and documented steps or scripts to immediately execute the rescue plan in the event of disasters. Once we are prepared with the rescue plan, it is important to review the database logs to find the actual time of the disaster and then communicate with the RTO and RPO to help stakeholders understand and agree on the loss of data (if any) and the time to restore. Once agreed, execute the restore plan and handover.