Clone Snow Leopard from Leopard?

[sjk]

Good question.

Without searching for Dave's earlier posts about this (yet), my vague understanding is that you always want to copy Snow Leopard volumes with SD! running on SL.

But what defines a "Snow Leopard volume" is still a bit unclear; does it mean any volume that SL has touched even if it's non-bootable? For example, if you've made changes on a volume of an external drive while running SL can that drive/volume still be used and copied with SD! on Leopard? Hard to imagine being limited to using drives/volumes under different OS X releases even if they shouldn't be copied while running an earlier one.

Instead of just answering here maybe Dave could write up a brief, easily referenced FAQ post on this topic for the sake of anyone seeking accurate information about it.