Sun Oracle Netra T5220: installation on RAID 1

Hi,

I have a Sun Oracle Netra T5220.  It has the Symbios Logic SAS1068E
RAID controller.

I would like to install OpenBSD on a RAID 1 drive (a mirror).  I
put two identical drives but I cannot assemble a mirror drive with the 
installer.  In the installer shell, dmesg reports:

mpi0 at pci8 dev 0 function 0 "Symbios Logic SAS1068E" rev 0x04: ivec 0x16
mpi0: UNUSED, firmware 1.27.2.0

So I try:

# bioctl -ivh mpi0

But no output can be seen.  These are the drives I tried:

* 2 x SAS Seagate HDD 146 GB,

* 2 x SAS DELL SSD 400 GB,

* 2 x SATA Patriot 256 GB.

The bioctl can see none of them.  I know the physical drives are OK.

I would appreciate it if someone could let me know what to do.


Thanks,
Irek