Disgusting Resilience Rule 3D3 Damage Question

[Styles]

If a Deathguard Unit is hit and wounded by a single shot by a weapon with 3D3 Damage, does then Disgusting Resilience rule mean the unit suffers 3D3-1 damage or  is the -1 to each of the 3 Dice. So for example if a 2,2 & 3 was rolled, it would be 4 damage instead of the 6 if it is  -1 to the total instead of each D3? Which is the correct way? Total Dice or each D3?

[Panzer]

A single wound with 3d3 damage would be 3d3-1 damage.

3 wounds a 1d3 damage would be 3d3-3 damage.

[Xenith]

As above: Damage is 3D3, DR gives damage -1, so damage is (3D3-1). As with any single attack, this goes on a single model unless otherwise specified.