we're using 2462s (dual-port version) behind a SAN switch, but upon installing the Atlanta trial I've had severe problems getting target mode to work.
I haven't had too much time (yet) to investigate further. I only got it working when starting the DSS *without any active fiber connection* (I unplugged the DSS' FC ports until the system was up) and only then booting the FC initiators. I had these symptoms before, but they got fixed a few releases ago.
Maybe you could try if this special boot sequence gets target mode working for you. I'll have to wait for the next maintanace window (at max 35 days away, that's when the trial is going to expire ) to check for myself.
Regards,
Jens
PS: Everything else in the Atlanta release is working for us, and better (it fixes quite a few problems that have been causing us major headaches). Therefore we had changed plans and have Atlanta in production use, without giving me a chance to flash the USB module ;-)