The path for the fence device may be different from the corresponding
physical device path. For example, the database device might be /dev/raw/raw1,
the physical device /dev/sda,
and the fence device /dev/sg0.
Note: Whenever the sg driver is loaded during startup (or
through user command), the system re-creates the /dev/sg* files.
Make sure that permissions are granted appropriately on these files
as part of the startup process. Otherwise, the system administrator
must manually reset permissions each time the system starts.