VMM 2012 and Storage Classifications without SMI-S?

if I understand the self-service capabilities of VMM 2012 right,

then I need storage classifications to get full self-service cloud

capabilities for our users to assign them specified storage (LUNs),

that they own (payed for). I want to decide which storage they have

to use and don't want the users to select storage completely free.

But only SMI-S storage can be classified.

So how do I get full self-service cloud capabilities without a SMI-S

provider for our SAN-Storage?

Or isn't that possible with VMM 2012?

Or can I classify storage without a SMI-S provider?

Thanks in advance

Joerg