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Are you on a recent (Dell) build, or one of the old (bankrupted Bakbone) builds?
I worked on and trained in Netvault a while back and smart disk was always a pain. There can be many reasons for smartdisk to not show up, and it really need the attention of someone taking an in-depth look into it.
The hard part: if you're on an older build, you're mostly out of luck, because all of the developers/original support folks are long gone when Bakbone went belly-up then sold off, only to have that company bought by Dell. Dell supports it now, but in order to get any reasonable kind of support, you'll need to be on a recent build.