Besides Leap 42.1's snapshot, can I use dd or ghost to only backup and restore Leap's system files?

Dear pioneers,

 On Leap 42.1, in order to future's restore crash system, 

besides Leap 42.1’s snapshot function, I want to have a manaual backup system image, but my system’s design
is: I install leap’s / on one disk 1, and /var and /home on other disk2,
so my question is, could I only backup disk 1’s image by DD command or ghost tool as disk1.img, and restore disk1.img
to restore system:(? of course, the disk2 is not crash as before.

A leap’s beginner.

Yes
Of course you run dd from a live system that runs from RAM, at least Disk 1 should not be in use at all