Converting an active/active configuration from software-based disk ownership to hardware-based disk ownership is a complicated process. If done incorrectly, your system might not boot. You are advised to contact technical support for assistance with this conversion.
The complexities arise because Data ONTAP cannot automatically provide the correct configuration the way it can when converting from hardware to software. If you do not make all of the required cabling or configuration changes correctly, you could be unable to boot your configuration.