Owncloud data folder on Cifs

/etc/fstab:

//192.168.1.205/owncloud /mnt/owncloud cifs uid=33,gid=33,dir_mode=0770,file_mode=0770,user=owncloud,password=passw0rd 0 0

What OwnCloud says, when you order it to set data dir in /mnt/owncloud:

Please change the permissions to 0770 so that the directory blah blah blah blah

Solution: /etc/fstab: add nounix

//192.168.1.205/owncloud /mnt/owncloud cifs uid=33,gid=33,dir_mode=0770,file_mode=0770,user=owncloud,password=passw0rd,nounix 0 0

umount /mnt/owncloud
mount -a

Done.