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UIS service update following disruption on 20-Feb-2016 [Monday 22-Feb-2016]

This is an update to information previously provided on Sunday, 21 February 2016.

Current situation

12:00 Monday, 22 February 2016: Following an electrical power incident on Saturday, 20 February, all UIS services are confirmed to be operational.

The backup power system at the Soulsby data centre has a fault which means that at present all services in the room are running on mains power without appropriate backup facilities. Our colleagues from Estates Management are prioritising the repair of this equipment. As a result of this fault there is currently a higher risk of further disruption to services.

We are undertaking further work on our services to minimise the potential of further disruption in the event of the loss in mains power.

We have confirmed that a service hosted for the School of Arts and Humanities and the School of Humanities and Social Sciences has been affected by this incident and arrangements are in place to address this problem.


At approximately 12:20 on Saturday, 20 February a very brief electrical power disruption to the entire West Cambridge site caused power systems at the Soulsby data centre to switch to the backup systems (batteries and generator). Power to the IT services continued without interruption and was restored to the mains input. The air chiller units did not restart properly, however, causing the temperature in the room to rise significantly.

Readings from the Soulsby data centre temperature monitor on Saturday, 20 Feburary 2016. Readings between 12:00 and 16:00. The temperature rose from 16C to over 40C between 12:20 and 13:20, at which point the building management system performed an emergency shutdown of all power to the room.

At approximately 13:20 the Sousbly building management system detected that the temperature in the room was above its critical threshold and initiated an emergency shutdown. The last recording was at 42 Celsius; the room normally operates at 16 Celsius.

UIS staff worked into the evening to bring services back online and work is continuing to ensure that our highest priority services are running from other facilities where possible.

Last updated 12:04 22-Feb-2016 by ihc22