Fix boot record after moving linux mint partitions to another disk
Copying partition is straightforward. Made using gparted. Create bootable USB stick (Startup disk creator in Linux mint), boot from it. Assume we have following partitions: boot /sdb1 (don't really know how it works) root /sdb2 home /sdb3 Do sudo mount /dev/sda2 /mnt ## if you have boot partition: # sudo mount /dev/sda1 /mnt/boot sudo grub-install --root-directory=/mnt /dev/sda Source of GRUB instructions