Google Cloud London outage blamed on misconfigured generators that failed to start

Google Cloud◆'s 4 November status update attributes the europe-west-2-b (London) outage on 20 October to a voltage-sensing design flaw and PLC misconfiguration. Feeder B's breaker had been opened on 14 October for repairs after a quarterly generator load test, so feeder A carried the full critical load when its underground cable failed. The PLC logic read a healthy utility source despite both feeds being de-energised and did not issue a generator start, and the UPS ran out after about five minutes. Google says the PLC has been reprogrammed and electrical changes tested. Defenders running on this zone should review their own power-failure and failover assumptions.

For security analysts · Written by AI from 1 source · Wrong?