SWT2_CPB:

We had campus networking create new mailing lists for us and added them to CRIC for the security and admin contacts fields.
GGUS-Ticket-ID: #1003078: Transfer failures as source with File Not Found error

One of our R740xd2 storage servers experienced issues with its RAID controller.
We worked with the vendor per warranty to troubleshoot issues.
We had an idea to drain a different R740xd2 server that had very little data, take the RAID controller from the server, then replace it in the problematic storage server and import configuration. The vendor agreed and allowed us to do this.
Once this was complete, we monitored it and it remained stable for days. We migrated data from this storage.
This storage also has a problematic drive, which we will replace soon.
Two storage servers will be unavailable temporarily as we perform tests.
The vendor is sending us a new RAID controller and new drive.
The monitoring and alerts we have in place are working.

Both of our CE (gk01 and gk10) were in the same rack. We drained gk01, moved it to another rack.

Once gk01 was moved, we drained gk10 while allowing gk01 to start handling new jobs.
We also performed these steps in preparation to upgrade a network switch in the same rack gk10 is located.
We upgraded the switch for three of our four XRootD Proxy servers and will do the fourth one within two months. We will be testing and monitoring the current new switches to ensure the throughput increase is evident.
We experience some transfer errors during these upgrades.

We have tried multiple troubleshooting steps for this and are continuing to work on it.
We performed steps in the ticket to modify crypto-policy for one of our four XRootD Proxy servers. The rest were fine.
We tried switching from the full-chain to leaf-only certificate.
We reviewed other information on this node.
We are going to renew the certificate, monitor, then rebuild it if we continue to see issues.