While sata support on the x86 side of solaris seems to be moving along
support on the sparc side is non-existent. The following blog highlights
this.

Solaris Sata Support

Drive: WD320GB Sata
Card: Adaptec Host SATA Controller 1205SA with Silicon Image 3112A
Turns out this card works very well in Solaris x86. However i want to
have it functional in a sparc system.

Adding the card to my SB100 system I see the following output

# prtdiag
pci    33   +tem-board/PCI3  pci9005,250
                  okay  /pci@1f,0/pci@5/pci9005,250


# prtconf
pci, instance #0
            pci9005,250 (driver not attached)
            pci, instance #1

# prtpicl -v
pci9005,250 (obp-device, 6d0000042b)
                  :_fru_parent	 (6d000005abH) 
                  :DeviceID	 0 
                  :UnitAddress	 0 
                  :vendor-id	 0x1095 
                  :device-id	 0x3112 
                  :revision-id	 0x2 
                  :subsystem-vendor-id	 0x9005 
                  :subsystem-id	 0x250 
                  :min-grant	 0 
                  :max-latency	 0 
                  :cache-line-size	 0x10 
                  :latency-timer	 0x40 
                  :interrupts	 00  00  00  01 
                  :class-code	 0x18001 
                  :devsel-speed	 0x1 
                  :fast-back-to-back
                  :66mhz-capable
                  :compatible	(6d00000434TBL) 
                   | pci1095,3112.9005.250.102 |
                   | pci1095,3112.9005.250 |
                   | pci9005,250 |
                   | pci1095,3112.102 |
                   | pci1095,3112 |
                   | pciclass,018001 |
                   | pciclass,0180 |

The drive attached to the card wasn’t showing up.
I sped over to trusty #opensolaris on irc.freenode.net
jmcpAtSun suggested I get newer release of solaris
than the 03/05 GA i had. From what he saw support should be there.