RAID-5 configuration

This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.
--
[ Picked text/plain from multipart/alternative ]
My WRKHDWRSC *STG looks like this:

Resource        Type-model  Status                Text
SI01             6512-001   Operational           Storage Controller
  DC05           6607-072   Operational           Disk Storage Controller
  DC06           6607-072   Operational           Disk Storage Controller
  DC07           6607-072   Operational           Disk Storage Controller
  DC08           6607-072   Operational           Disk Storage Controller
  DC09           6607-072   Operational           Disk Storage Controller
  DC10           6607-072   Operational           Disk Storage Controller
  DC11           6607-072   Operational           Disk Storage Controller
  DC12           6607-072   Operational           Disk Storage Controller
  DC13           6607-072   Operational           Disk Storage Controller
  DC14           6607-072   Operational           Disk Storage Controller
  DC15           6607-072   Operational           Disk Storage Controller
  DC16           6607-072   Operational           Disk Storage Controller
  DC17           6607-072   Operational           Disk Storage Controller
  DC18           6607-072   Operational           Disk Storage Controller
  DC19           6607-072   Operational           Disk Storage Controller
  DC20           6607-072   Operational           Disk Storage Controller
CMB01            9162-001   Operational           Combined function IOP
  DC01           6607-030   Operational           Disk Storage Controller
  DC03           6607-030   Operational           Disk Storage Controller
  DC04           6607-030   Operational           Disk Storage Controller
  DC02           6607-030   Operational           Disk Storage Controller
  DC22           6320-002   Operational           Optical Controller
  DC21           6390-001   Operational           Tape Controller

I assumed when I added the 6512, the 4x 6607s under CMB01 would become
eligible to be a RAID-5 array. Did I miss a cable or something? Or am I
stuck with mirroring for those internal units?
NOTICE:  This E-mail may contain confidential information.  If you are not
the addressee or the intended recipient please do not read this E-mail and
please immediately delete this e-mail message and any attachments from your
workstation or network mail system. If you are the addressee or the intended
recipient and you save or print a copy of this E-mail, please place it in an
appropriate file, depending on whether confidential information is contained
in the message.