With a bit of research I answer my own post.
Well according to the this software I guest I can partition my RAID.
[
www.softraid.com]
the last paragraph �SoftRAID 3 General Specifications� says :
�Allows you to create a mix of RAID volumes on the same disks.
Creates non-RAID volumes from single disks, or RAID 0 and RAID 1 volumes from 2 or more disks or parts of disks.�
It's come with the OWC Mercury Elite RAID