here's some more info, not sure if these are related or not. the scsi probe sees the disks in OBP, but it doesn't look like the show-disks lists them. I suppose it possible that the core issue here is the raid needs to be set-up on the controller and I just haven't figured out how to do that yet...
{0} ok probe-scsi-all
/pci@400/pci@2/pci@0/pci@e/scsi@0
FCode Version 1.00.63, MPT Version 2.00, Firmware Version 9.05.00.00
Target 9
Unit 0 Disk SEAGATE ST914602SSUN146G 0400
SASDeviceName 5000c50006387953 SASAddress 5000c50006387951 PhyNum 0
Target a
Unit 0 Removable Read Only device TEAC DV-W28SS-W 1.0A
SATA device PhyNum 7
Target b
Unit 0 Disk SEAGATE ST914602SSUN146G 0400
SASDeviceName 5000c50006158ab7 SASAddress 5000c50006158ab5 PhyNum 1
/pci@400/pci@1/pci@0/pci@b/pci@0/usb@0,2/hub@2/hub@3/storage@2
Unit 0 Removable Read Only device AMI Virtual CDROM 1.00
{0} ok show-disks
a) /pci@400/pci@2/pci@0/pci@e/scsi@0/disk
b) /pci@400/pci@1/pci@0/pci@b/pci@0/usb@0,2/hub@2/hub@3/storage@2/disk
c) /iscsi-hba/disk
q) NO SELECTION
Enter Selection, q to quit: q
{0} ok
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