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News
Action Required: Migrate Unused Data from /nobackup Filesystems
02 Nov, 2026
Usage on the /nobackup filesystems are beginning to reach levels where we will start to see performance degradation. Please clean up your data by migrating unneeded or unused files for your current jobs to Lou for long-term storage. We encourage...
Upcoming Monthly Split Patching, Nov. 3 & 5
28 Oct, 2026
To facilitate patching, the systems at NAS will undergo maintenance Tuesday, November 3 and Thursday, November 5 according to the following schedule: November 3, 7:00 a.m. to 4:00 p.m. (Pacific) Jobs on Aitken, Electra, and the LDANs will be...
New Cabeus Grace Hopper Nodes Now Available
13 Oct, 2026
188 NVIDIA GH200 Grace Hopper nodes added to the Cabeus supercomputer last month are now available to all users. This expansion brings the total count of Grace Hopper nodes in the system to 538, increasing the system's theoretical computing power...
UPDATE: Downtime for Cabeus Grace Hopper Nodes Oct. 30
13 Oct, 2026
UPDATE: The original announcement had this work scheduled for Thursday, October 22. The downtime has been moved to Friday, October 30 and the text below has been updated to reflect this change. In order to integrate new hardware into the...
Monthly Split Patching Schedule, Sept. 29 and Oct. 1
17 Sep, 2026
To facilitate patching, the systems at NAS will undergo maintenance Tuesday, September 29 and Thursday, October 1 according to the following schedule: September 29, 7:00 a.m. to 4:00 p.m. (Pacific) Jobs on Aitken, Electra, and the LDANs will...
Urgent Cabeus Grace Hopper Downtime Sept. 17
14 Sep, 2026
To facilitate the integration of 188 new Grace Hopper nodes into the Cabeus supercomputer, the GH200 nodes will go into downtime September 17 from 9:00 a.m. to 3:00 p.m. (Pacific). Jobs running on these nodes will be suspended at the start of the...
Athena Downtimes Over the Last Two Weeks of September to Integrate New Hardware
04 Sep, 2026
Two new racks of compute nodes are being added into the Athena supercomputer over the next few weeks, which will require partial and complete downtimes to fully integrate into the existing system: September 22-24: A partial outage will take...
Urgent Downtime for /nobackupp17, Sept. 3
27 Aug, 2026
To fix a known issue occurring on /nobackupp17 causing intermittent availability problems, we will be performing software upgrades to the filesystem on September 3 from 8:00 a.m. to 12:00 p.m. (Pacific) during the scheduled Athena, Endeavour, and...
Downtime for Split Patching Sept. 1 and 3
24 Aug, 2026
To facilitate patching, the systems at NAS will undergo maintenance Tuesday, September 1 and Thursday, September 3 according to the following schedule: September 1, 7:00 a.m. to 4:00 p.m. (Pacific) Jobs on Aitken, Electra, and the LDANs will...
Cabeus Skylake and Cascade Lake V100 Nodes Retiring Aug. 24
19 Aug, 2026
On August 24, 2026, we will be decommissioning the older Cascade Lake/V100 and Skylake/V100 nodes from our Cabeus supercomputer. Please make sure any jobs you currently have running on these nodes will complete before they are turned off. We...
Network Maintenance Aug. 22 May Impact NAS Websites
17 Aug, 2026
On Saturday, August 22 between 10:00 a.m. and 2:00 p.m. (Pacific), we will be performing updates to our network that may cause some connection issues when trying to view the NAS website, including the Knowledge Base. Tools like myNAS will still...
July 28 & 30: System Downtimes for Monthly Patching
20 Jul, 2026
To facilitate patching, the systems at NAS will be unavailable Tuesday, July 28 and Thursday, July 30 according to the following schedule: July 28, 7:00 a.m. to 4:00 p.m. (Pacific) Jobs on Aitken, Electra, and the LDANs will be suspended at...
Requests for Computing Time for the 2027 Operational Year Due July 20
22 Jun, 2026
All NASA mission directorates are currently gathering requests for high-end computing time on resources at the NASA Advanced Supercomputing (NAS) facility for awards to begin October 1, 2026. The deadline for submitting requests is July 20, 2026. ...
Annual NAS Facility Maintenance, June 12-14
01 Jun, 2026
To perform large-scale maintenance on the NAS facility at Ames Research Center, we need to power down the main building for an extended period of time, in which all compute and filesystems will be unavailable. The outage will begin Friday, June...
POSTPONED: Downtime for Aitken Rome Nodes, June 9-11
18 May, 2026
Updated Announcement (6/1/26) The Aitken Rome downtime originally scheduled for June 9-11 has been postponed. The nodes will be available to all users until the beginning of the Annual Facility Maintenance beginning June 12. A new schedule for...
Best Practice: Submitting Jobs from the Correct Front End
17 Apr, 2026
A common cause of submitted jobs not starting is that they are being submitted from the incorrect front-end system, which cannot access the PBS server that targets the requested node model type. For example, if you want to run on Athena's Turin...
April 28 & 30: Split Patching Schedule for Compute Systems
17 Apr, 2026
As part of our efforts to reduce impacts on users during our monthly patching cycle, we're testing a split schedule across two days: April 28, 10:00 a.m. to 4:00 p.m. (Pacific) A suspend/resume will occur for all Aitken, Electra, Endeavour,...
NAS Network Maintenance Scheduled for May 2-3
13 Apr, 2026
Network maintenance will take place on May 2 and May 3 from 10:00 a.m. to 4:00 p.m. (Pacific) each day. During these periods you may experience some intermittent loss of connectivity and disruptions while trying to access NAS services. Work on...
Lou Downtime Scheduled for April 15
13 Apr, 2026
The Lou mass storage system will be unavailable on April 15, 2026 from 9:00 a.m. to 5:00 p.m. (Pacific) to facilitate network infrastructure changes. During this time, you will not be able to transfer data to or from Lou. There should be no impact...
March 25: Suspend/Resume for All NAS Systems
12 Mar, 2026
All compute systems at NAS will be unavailable Wednesday, March 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 Athena, Aitken, Electra, Endeavour, Cabeus, and...
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