University of Cambridge Computer Laboratory - Power outage affecting William Gates Building – Incident details

This incident was previously resolved.

WGB and GN09 infrastructure is operational again. Most GN09 servers and services have been restored.

It is likely that some systems may not have started correctly, or may have entered a broken state if running elsewhere but relying on systems in GN09. This is especially likely if they use filer or other networked storage that lost power. Contact service-desk@cst.cam.ac.uk to report any issues.

The UPS supplying power to part of GN09 has apparently suffered a fault whilst powering back up after the outage, and one third of its capacity is currently inoperative; resilience is reduced until repairs can be arranged.

Power appears to have been restored, and some systems have come back up automatically, however full restoration of services will take time and will only begin once we are confident that the power supply is stable and the UPS batteries have had some time to recharge.

We are aware of at least one apparent hardware failure arising from this outage so far.

Servers in GN09 not connected to a UPS supply, and machines in offices, have lost power. Servers in GN09 connected to a UPS supply are likely to lose power in a few minutes. UK Power Networks has confirmed the outage and expects power to be restored around 01:30-02:30. Most departmental IT services will be unavailable until further notice.