Cheyenne compute nodes remain down pending restoration of stable power supply

July 24, 2019

The Cheyenne system's compute nodes remain down due to recurring electrical power disruptions at the NCAR-Wyoming Supercomputing Center (NWSC). Black Hills Energy Company isolated the source of the instability and began repair efforts last night but has not provided an estimate of when the work will be completed. Cheyenne's compute nodes will remain down until CISL is confident that NWSC’s power supply is stable.

The Cheyenne login nodes, Casper cluster, GLADE file system, and HPSS remain up and available to users. Watch for updates during the day through the Notifier service.