In my old environment we had a .... ahem.. 3 letter SAN. I had the ability to concatenated LUNs or "join" them logically on the storage side and present that to the host where the host would see the combined LUN's as one.
They call it a meta LUN. Is my 3020 able to present a LUN to a host that is an "aggregate" of more than one LUN?
Ultimately, I am going to have to collapse a file server with LAS into a VM that already has a 1TB volume/LUN.
Most of this data is end (L)user home directories and I dont want to "flex" my volume over the 1TB dedupe limit.
In the old days we used to concat (Horrible performace BTW), on a SAN using Veritas Volume Manager.
By your comment, I will assume you are talking Windows and not Unix, therefore I would investigate the option of concat with (native) Volume Management in the Windows box that will mount the LUN/LUNs or with Microsoft DFS product as an add on.
So...not as much time to reply as I'd like....I think a key thing to keep in mind is how aggregates and flexible volumes work. Given that aggregates span across large #'s of disks/spindles...and so FlexVols and the LUNs inside inherit that benefit, there's not as much need for Meta LUNs to provide that higher spindle count benefit.
As I understand it -- I'm not an expert on ~ahem~ 3-letter Storage, but NetApp uses a bit of different terminology: Basically, a Flexible Volume on a NetApp is similliar to a MetaLUN -- a Flexible Volume basically can contain 1 or more RAID groups, which are similiar to the LUNs you concantenate together to form a MetaLun.
I know that's an over simplification, but hopefully it answers your question.