You have to work with your account team to get access to NFS VMalign functionality. Since it is a brand new functionality introduced in Data ONTAP 8.1.1, we want to be aware who is using it. The functionality will go GA in one of the future versions of Data ONTAP . VSC 4.1 has the required code to use the VMalign functionality in 8.1.1. There is not need to upgrade it.