One of the NAIRR PIs using nodes on the Barcelona cluster requests IOMMU be disabled in BIOS. These are the settings:
System Settings --> Devices and I/O Ports --> IOMMU --> Disabled
System Settings --> Processors --> Secured-Core --> IOMMU --> Disabled
and these are the nodes:
moc-r4pcc04u09-nairr
moc-r4pcc04u11-nairr
moc-r4pcc04u12-nairr
moc-r4pcc04u36-nairr