is this your management server ? I've had this a while back and had to make sure i had at least 4 gatekeepers presented to the box.  You can try renaming C:\Program Files\EMC\SYMAPI\db\symapi_db.bin to symapi.db.bin.old  ..and re-run "symcfg discover". It should create a new symapi_db.bin file. That will rule out db corruption.  If you have device group on the host you might want to export them first (symdg exportall -f dgbackups)
What command syntax would I use against an FA to identify and list a report that lists a devices id and associated lun #. I found a report (generated a few years ago), with out the sytnax identified. looks like this  director                 Device Name          Attr     Address       ---------------------- ----------------------------- ---- --------------    Ident   Symbolic  Port Sym   Physical                     VBUS  TID  LUN    ------  --------  ---- ----  -----------------------                          ----  ---  ---     SA-3A   03A      0                            0000  Not Visible                               0    0         000                           0001  Not Visible                               0    0         001                           0002  Not Visible                               0    0         002
Command to list device id's and lun #