NERSCPowering Scientific Discovery Since 1974

Dates for Early October Multi-Day Maintenance Finalized

September 18, 2017 by Rebecca Hartman-Baker

Both Cori and Edison will be unavailable for more than 4 days while our EPO (Emergency Power Off) system is upgraded and an additional pump is installed in support of water-cooling the large HPC systems.

NERSC will begin powering down all systems at 1:00 pm Pacific on Friday, October 6. Facilities maintenance work will span the weekend and may go into Monday. After the facilities work is complete, we will power up the machines and restore service to users. We expect to return the machines to users by the end of the business day on Tuesday, October 10.

During the outage, everything must be powered down, so no machines or filesystems will be available. Jobs in the queue before the outage will be retained and scheduling will resume when service is restored.

The upgrade to the EPO system will increase reliability in the event of power issues, and the additional pump will add more cooling capability to our infrastructure, reducing the impact of events like the Labor Day weekend's heat wave to our operations. Thanks for your patience as we increase the reliability of our operations for you!