My one of the Volumen is get full, now LUN Driver is missing
Please find the details.
/vol/mbs_sql_snap/qt_mbs_sql_snap/mbs_sql_snap.lun   70.0g (75162608640)   (r/w, offline, mapped)
  Comment: "snapinfo lun for SQL backup"
  Serial#: BABUE$CNafiD
  Share: none
  Space Reservation: enabled (not honored by containing Aggregate)
  Multiprotocol Type: windows_2008
  Maps: sql_dbsrv=2
  Occupied Size:   68.3g (73352925184)  
  Creation Time: Tue Jun  5 10:51:58 GST 2012
  Alignment: misaligned
  Cluster Shared Volume Information: 0x0 
  Space_alloc: disabled