Selected Research Computing Services Currently Unavailable

Update timeline

1. investigating Jun 25, 2026, 09:53 AM UTC

   We are aware of an issue currently affecting the following services: • ARCCA Falcon HPC compute cluster and associated supporting services • ARCCA STAR compute and Storage (Falcon) • ARCCA SoftIron storage • ARCCA Ser Cymru Storage • ARCCA Physics storage (EC) • ARCCA-hosted virtual machines (VMs) This issue is under urgent investigation.

2. identified Jun 25, 2026, 01:15 PM UTC

   We are currently restoring the ARCCA-hosted virtual machine services (VMs); however the other research computing services as previously reported continue to remain unavailable. We believe we have identified the cause of the issue, and are working with our supplier with a view to restoring full service, tomorrow morning (Friday 26 June). We will provide a further update in due course. We apologise for any inconvenience that this interruption is causing.

3. identified Jun 26, 2026, 03:48 PM UTC

   Selected Research Computing Services - Further Update The ARCCA Falcon supercomputer is now back online; however please note that we are currently operating Falcon with a single login node (cfl1). Please avoid running scripts directly on the login node and use the scheduler for all work, including short tests. The following services are now fully operational: - ARCCA Ser Cymru Storage - ARCCA Physics storage (EC) - ARCCA-hosted virtual machine services (VMs) We are still working to resolve issues with the following: - SoftIron storage - SMRT Link VMs We apologise for any disruption experienced.

4. resolved Jul 14, 2026, 04:27 PM UTC

   This incident has been resolved.