sudo update-grub
на другом диске
powercfg -h off
udisksctl mount -b /dev/sdХХ
sudo udisksctl mount -b /dev/sdХХ
udisksctl unmount -b /dev/sdXX
sudo udisksctl unmount -b /dev/sdXX
groups user
sudo groups user
audio,floppy,optical,scanner,storage,video,wheel