Without
The failover waits for a person to be sure.
- 03:20 The primary data center loses power and its network path.
- 03:20–04:10 Someone is woken up, works out what is still alive, and starts the procedure by hand.
- 03:50 Both sites briefly believe they are primary. Split brain.
- 04:40 File services are back. The incident report opens with eighty minutes.
Outcome
Eighty minutes of downtime in a sector that reports them, a regulator asking why, and a split brain to explain afterward.









