Dell server Poweredge R6525
PIC Card mlx5 Connect-X6

Issue: OS does not see the Card.
lspci -v | grep Mellanox "returns nothing"

/sys/device/pci000:a0 " no 0000:a0:03:1 dir found under here like my other 8 identical servers

lsmod | grep mlx5 and lsmod | grep rdma and lsmod | grep ib " matches my working systems

I have tried # systemctl restart rdma
# udevadm trigger

systemctl status rdma-ndd.server is Dead, can not start it

# nmcli con " shows the Ib0 Name and UUID number, type infiniband. "

nmcli dev " shows no ib0 device "

I all try to restore from a tar file /sys/devices , but it is write locks " mount -o remount /sys,rw /sys did not work for me.