Drop D tuning

G----------    --------- 
D----------    ---------
A----------    ---------
D-0/1/2
 or -0-0-0-0- 
I have seen different versions of this and the slide works  best, however i reckon u can just hammer on which still gives the same effect


G----------------------------------------
D----------------------------------------
A-1-1-1-1----------------4-4-4-4---------
D---------3-3-3-3-0-0-0-0--------6-6-6-6-