Emergency power failure Huygens building lasted hours

Saturday July 22 at 11:37, there was a power outage in the Huygens building, also for all equipment connected to emergency power. The power outage lasted long enough to leave even devices and rooms with a UPS battery backup without power. This included all network equipment (routers, switches, wireless access points) and all servers in the C&CZ large server room.

When power returned from 14:08, several devices were defective:

- Half of the fully redundant FNWI router was defective. External companies in the UBC are not doubly connected to their provider, so they had no connectivity until Monday, when their connectivity was switched. Since Monday afternoon, the FNWI router has been repaired, so is redundant again.

- Eight power distribution units (PDUs), that each supply power to ca. eight servers in the C&CZ server room were defective. Power connections of the most important servers were switched to different outlets on Saturday afternoon or these servers were restarted after replacement of their power distributors. On Monday the rest of the computer cluster nodes have been restarted.

As of August 1, the emergency power in the Huygens building is guaranteed again. The UVB investigated and solved all problems.