Vinum under Sparc64

[James Taylor]

I'm trying to get vinum setup to create a raid5 array, but am running
into some snags due to the lack of disklabel support.  From what I
understand, to do any partition management you need to run sysinstall to
create your partitions.  The only options here after creating partitions
however is to set it up as either ufs or swap.  How would you go about
setting the partition type to vinum without being able to run disklabel
-e?

Am I S.O.L. here?