Change to raid4

I am trying to use the powershell toolkit to change my raid_dp aggregate to a raid4 aggregate. I am trying to use the code below. I think this should be a simple task, but I appear to be having issues.

Set-NaAggr aggr0 -raidtype raid4 but this does not work. Any help would be great.

Re: Change to raid4

I got it...just had a huge brain fart.

set-NAaggrOption aggr0 raidtype raid4