I've done the steps to migrate vol0 from aggr0 to aggr1

from: https://communities.netapp.com/thread/11439

vol restrict newroot

vol copy start -S root newroot

vol online newroot

vol options newroot root    # aggr options root is from maintenance mode...when done here the aggregate containing newroot will become root since it has the root volume.

vol status   # confirm newroot is "diskroot"

reboot

vol status   # confirm newroot is now root

vol offline root

vol destroy root

vol rename newroot root

--

 and am about to reboot

Is it necessary to do the

aggr options aggr1 root

Or only if on reboot ontap can't find the root vol0 on aggr1?

thanks