**N.B.: architecture of original system and rescue system must be the same (64bit - 64bit resp. 32bit - 32bit)**

1. Format the new drive and partition as wanted for root file system (/) and swap and more partitions

2. Boot from a rescue system (USB-stick with comfortable live system or OpenSUSE install media in rescue mode)

3. Mount old and new disk

4. Copy the content of the old disks partitions to the new partitions (''cp -avf /mnt/old_disk/* /mnt/new_disk'') 

5. Disconnect old drive, reboot with the Rescue system as above (openSUSE).

6. Determine new disk id (''/dev/disk/by-id'')

7. ''mkdir /mnt/new''

8. ''mount /dev/sdxY /mnt/new'' # where ''/sdxY'' is the ''/'' for the new disk

9. ''mount -t proc none /mnt/new/proc''

10. ''mount --rbind /sys /mnt/new/sys''

11. ''mount --rbind /dev /mnt/new/dev''

12. ''chroot /mnt/new /bin/bash''

//...root should now be the new disk root//

11. Modify ///etc/fstab// to reflect new disk id for ''/'' and ''swap'' and the other copied partitions with the new disk-id from above

12. Modify ///etc/default/grub// to reflect new disk-id in the ''GRUB_CMDLINE_LINUX_DEFAULT'' entry (if ///etc/grub// exists)

13. Modify ///etc/default/grub_installdevice// to reflect new disk-id

14. Modify ///boot/grub2/device.map// to reflect new disk-id 

15. ''grub2-mkconfig -o /boot/grub2/grub.cfg''

16. ''grub2-install /dev/sdx'' (this installs grub2 to the new disk mbr)

17. ''exit''

18. ''reboot''

....in BIOS, set boot to the new drive if necessary

You should get to the Grub boot menu now and the options should work as before.