# Boot com um Linux Live, faça um jail (chroot) e daí gere um novo uuid pro disco e reescreva o grub #

### Live ###
sudo su -
e2fsck -f /dev/sdX#
blkid
tune2fs -U random /dev/sdX#
mount /dev/sdX# /mnt
mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
chroot /mnt

### Jail ###
blkid /dev/sdX

# /etc/fstab (UUID={NEW_UUID} / ext4    discard,noatime,errors=remount-ro 0 1)

update-initramfs -u -k all
grub-install --recheck --no-floppy /dev/sdX
update-grub ; sync ; exit

### Live ###
umount /mnt/sys /mnt/proc /mnt/dev/pts /mnt/dev /mnt

### OBS ###
# No primeiro boot após este procedimento, entre em modo rescue no Debian/RH% e depois apenas reinicie.