User Profile Disks require SMB 3.0?

Hi all,

I have some netapp space available for User profile disks, the netapp does not support SMB 3.0 and when I try and apply the setting i get an RPC error: 

0x800706BA

Similar to this thread here which suggested SMB3 was required.

http://social.technet.microsoft.com/Forums/windowsserver/en-US/5a4e6fb8-ad10-4ac1-b3ac-55d414b3fb17/got-rpc-server-is-unavailable-error-when-configuring-user-profile-disk-to-use-a-samba-share?forum=winserverTS

So would like clarification, is SMB 3.0 a requirement?

I have managed to setup a file share on a windows 2012r2 box on storage which does not support SMB3.0 and it works... I don't know if windows is doing something funky in the back end to make it work though.

Thanks