VPSA allows to create high performance volumes that use large amount of drives in RAID 10, 50 or 60 configurations
In order to do that, first create multiple RAID groups. (could be RAID 1, or RAID 5 or RAID 6).
Once you have multiple Raid groups, when you create a volume, designate it as a "Stripe" and select the multiple raid groups.
This will create a volume that stripe over multiple raid groups and uses all the drives in all raid groups. The stripe size is 64KB.