Cheyenne maintenance update

February 28, 2020

Cheyenne repair and update efforts continued on Thursday, again successfully and without incident. CISL facility engineers at the NCAR-Wyoming Supercomputing Center restored electrical power to Cheyenne at 8:30 a.m. Nortek engineers completed their final inspections of the system’s cooling units. Late Thursday night, CISL HPC engineers updated the firmware on all of Cheyenne’s approximately 1,000 power supply units and validated the system’s InfiniBand hypercube fabric. 

While Cheyenne remains down today, users can access the Casper cluster, GLADE and Campaign Storage file systems, data-access nodes, and HPSS by logging directly in to Casper at

Cheyenne is expected to return to service no later than Saturday evening. This weekend users will be updated on any significant changes through the Notifier service.