sudo cp -ax /media/hd /media/ssd

sudo -s
for f in sys dev proc ; do mount --bind /$f /media/ssd/$f ; done
chroot /media/ssd
grub-install /dev/ssd
update-grub

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

$ grub-install --recheck /dev/ssd

cp /dev/sdaX /dev/sdbY