I recently enabled the filestream feauture on our SQL server instance. The filestream is hosted on a dedicated lun.
This server is hosting several databases (only one has filestream configured) with a shared lun for the log files and another shared lun for data files.
After I enabled and configured the filestream the databases backup is skipped:
[09:01:01.988] [SQL-Server] Database requested has not been configured for backup. This database is marked as:Disk(s) used by this database are used by other database(s).. Server:SQL-Server Database:databasename. This Database will be skipped.