Are you having this problem when running jb_config?
I was having the same problems running 2.7 using Networker 5.5 with an Adic unit.
I had to install the latest patches for Solaris and link the device file.
Do:
Install the lastest patches for Solaris 2.x
Install the driver pkg for Networker and search "dmesg" for the lus driver after the
installation.
Next, create a soft link called lus in /dev to /device...(to device file)
ex

/devices/iommu@f,e000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/lus@0,0:0)
For reasons unknown it does not link the device file.
Then run the commands:
/etc/LGTOuscsi/lusdebug 1 (sets debug level to 1)
/etc/LGTOuscsi/lusdebug 0 (sets debug level to 0)
/etc/LGTOuscsi/inquire (lists all SCSI devices attached)
Then finally run jb_config.
Hope this helps..