You may have to disable fencing in the following cases:
By default, the VxFEN driver operates with I/O fencing enabled. To disable this feature without removing the coordinator disks, you must create the file
/etc/vxfenmode and include a string within the file to notify the VxFEN driver.
To stop and restart the driver
echo "vxfen_mode=disabled" > /etc/vxfenmode
/etc/vxfendgfile if fencing is to be later reenabled.