An entry (conceptual row) in the
cFcSdvVirtRealDevMapTable. Each entry represents a
Real Device(s) mapped to a Virtual Device for
virtualization within the scope of a VSAN.
When the Real Device represented by an entry in
this table whose instance of cFcSdvVirtRealDevMapType
is 'primaryDevMap' comes on-line, the corresponding
Virtual Device that virtualizes such Real Device
also comes on-line and registers itself as one
of logged-in devices in the FCNS database - an
entry into 'fcNameServerTable' of CISCO-NS-MIB
and SW_RSCN and RSCN are appropriately generated.