You use Qlogic network card and the qfle driver maybe your ESXi-Host will run into a PSOD. In may case it was the qfle3f driver and the hosts ran serveral times into a PSOD. The version of the driver does not matter in this case. If you the FCoE adapters in hosts then the hosts will always send some communication over thes adapters. In some cases there happens a PSOD because nobody is answering.

If you install the driver you always install a driver package which includes 4 drivers.

-qfle3 => Network driver
-qfle3f => Fibre-Channel over Ethernet
-qfle3i => iSCSI
-qcnic => other network driver (don’t know the exact usage)

After a few cases with VMware I get the tip: “When you don’t use iSCSI/FCoE why don’t you remove it?”

If you remove the drivers and your storage is connected over iSCSI,FCoE you will lose storage connection! Always put your host into maintance mode before changes!
So if you don’t use the protocols/modules here how to remove them:

# esxcli software vib remove –vibname=qfle3f

# esxcli software vib remove –vibname=qfle3i

Network drivers:

First check which drivers you are using because if you remove the you are using your ESXi-Host is disconnected from network after the reboot

Check network adapters and drivers:
# esxcli network nic list

# esxcli software vib remove –vibname=qcnic

# esxcli software vib remove –vibname=qfle3

After you have removed the modules reboot your hosts and you are done 🙂