hardware or software based disk ownership?

Hello all, I sure do have a lot of questions lately,

I'm hoping to consolidate two aggregates into one for better space use, 
knowing that we might lose some performance.

We're currently running two SVMs, each with its own aggregate, one one 
each node of a FAS8020 cluster running 9.1P6 (I know, I know).

I inherited ownership of this cluster and didn't set it up.

When I try to add a new volume to one SVM I can only see one aggregate 
but I'd like to put that volume on the other aggr.

How can I tell if I'm running HW or SW based ownership?

To confirm, if I was running SW based should I be able to use either 
aggr on either SVM?

And last, is there any way to change from HW to SW without tearing it 
all up?


Randy