Get Storage Profile from VM

Hello


I'm able to retrieve Orgs, vDC's, vApps and then Vm's. From the VM's i'm able to retrieve CPU RAM and Disks.


The only thing i can't retrieve is the Storage Profile for the Vm:


$vm = $service->createSDKObj($vmRef);


$vm->get????


Does anyone have a hint for me?


Thank you very much!