Creating a striped set of mirrors using gvinum

[Sven Willenberger]

I am hoping someone has found a way to create this type of raid set 
using [g]vinum. I see that it is a trivial matter to create a mirror of 
2 striped sets but I have not seen a way to create a stripe set out of 
multiple mirrored sets (e.g. stripe across 3 sets of mirrors). Has 
anyone managed to implement this and, if so, what does your 
configuration file look like? If not, could this be added as a feature 
request for gvinum?

Sven Willenberger