All compute systems at NAS will be unavailable Wednesday, February 25, 2026 from 5:00 a.m. to 11:59 p.m. (Pacific Time) to facilitate system patching. The following systems will be affected:

• Jobs on Cabeus' Grace Hopper nodes will be suspended at the beginning of the downtime and will be resumed at the conclusion of the period. There should be no other impact to these jobs.
• Athena, Aitken, Electra, Endeavour, Lou, and Cabeus' A100 and V100 nodes will go into dedicated time. Jobs running on these nodes will be drained prior to the start of the downtime and any jobs submitted that will not complete before 5:00 a.m. on February 25 will not start.
• All front ends, including the AFEs, CFEs, PFEs, LFEs, etc., will be unavailable during this period.
• Lustre and NFS filesystems will be unavailable until the end of the downtime.

See Running Jobs Before Dedicated Time in the Knowledge Base to learn how to manage your jobs to run before dedicated time.

If you have any questions or need assistance please contact the Control Room at (800) 331-8737, (650) 604-4444, or support@nas.nasa.gov.