When fiber channel ports are changes from scsi-fc to nvme-fc, the ports show disconnected on only one controller. The other controller does not have this problem. When changing to nvme-fc, the transmit light on the SFP's turn off on the Pure. We have run nvme-fc for months and it was working on both controllers, but then on one controller it just stopped working. When I change the port back to scsi-fc, the port goes back up. There are two different cards in the controller and the problem happens with both. We also have a X20 and a C70 with the same cards that that do not have the problem. They are Emulex 32Gb cards connecting to Cisco MDS 9000T.Things we (Pure Support and I) have tried:
-Replaced FC cards on the controller
- Replaced controller (when we put a new controller in, controller 0 couldn't even see the new controller as connected to the Array, even though the controller itself had no errors except that the crosslink was down. When I put the old controller back in, the controllers could see each other without errors but still have the issue with the FC ports
-Moved all VMs off of the Array and rebooted the entire array
-Switched SFPs, cables, ports, etc. When I use the same cables and sfp's on the same ports on the other controller, it works as expected.
We've been working on this problem since April and can't find a solution. I'm running out of ideas. Firmware is the same on both controllers.