You should be able to easily restore the drives using NVMe cli in RHEL 7.4/.3
root@:~#nvme list
'you should now see a list of all NVMe drives attached to the system/associated identifiers
root@:~# nvme format /dev/nvme0n1
root@:~# nvme subsystem-reset /dev/nvme0
root@:~# nvme reset /dev/nvme0
root@:~# reboot
Once the machine has rebooted, once again open terminal and run "root@:~# nvme list"
See if the firmware is now listed appropriately. Note that this process will completely wipe the drive (including all data).
If you have any issues, let me know and I'll help you get them sorted out.
-Craig
root@:~#nvme list
'you should now see a list of all NVMe drives attached to the system/associated identifiers
root@:~# nvme format /dev/nvme0n1
root@:~# nvme subsystem-reset /dev/nvme0
root@:~# nvme reset /dev/nvme0
root@:~# reboot
Once the machine has rebooted, once again open terminal and run "root@:~# nvme list"
See if the firmware is now listed appropriately. Note that this process will completely wipe the drive (including all data).
If you have any issues, let me know and I'll help you get them sorted out.
-Craig