install Brother DCP-7030 on Ubuntu
This printer might not work on usb3 ports, disabling usb3 in bios setup could helps thou:
# download scanner driver from
# http://support.brother.com/g/s/id/linux/en/download_scn.html
# install scanner driver
sudo apt-get install brscan3-0.2.11-5.amd64.deb
# link missing files (if required)
sudo ln -s /usr/lib64/libbrscandec3.so /usr/lib/libbrscandec3.so
Edit libsane udev rules. eg: sudo gedit /lib/udev/rules.d/40-libsane.rules
Add the following 2 lines before "LABEL="libsane_rules_end"".
# Brother scanners
ATTRS{idVendor}=="04f9", ENV{libsane_matched}="yes"