Cheyenne cluster returned to full service

October 22, 2019

The Cheyenne cluster was fully restored to service Monday at approximately 6:15 p.m. MDT. CISL staff and vendor service engineers identified a faulty pressure sensor in one of the system’s cooling units that caused an overheating event early Sunday morning. Cheyenne’s automatic controls immediately responded as designed and shut the system down to prevent serious widespread damage. The pressure sensor was replaced in the afternoon and CISL’s System Services and Consulting Services groups then began the reboot and system verification processes.

CISL thanks everyone for their patience, understanding and cooperation throughout the outage.