We have noticed that our RMAN DB backup has failed with following error. We are not using any NAS storage. This is just DB full backup.
08/19/2015 13:35:02 - Info bphdb (pid=16301) Processing /u01/app/oracle/admin/common/bin/RMAN_backup.sh
08/19/2015 13:35:02 - Info bphdb (pid=16301) Waiting for the child status
08/23/2015 02:29:30 - end writing
08/23/2015 03:28:49 - Error bpbrm (pid=17416) from client xxxx: ERR - Script exited with status = 99 <NDMP backup failure>
08/23/2015 03:28:49 - Error bpbrm (pid=17416) from client xxxx: ERR - bphdb exit status = 6: the backup failed to back up the requested files
08/23/2015 03:28:51 - Info bphdb (pid=16301) done. status: 6: the backup failed to back up the requested files
the backup failed to back up the requested files (6)