I'm not sure that the 3510 can be directly connected to the onboard FC connection. I think Sun only supports connecting their FC JBOD to that. You would need to get an X6767 or X6768 HBA to connect to the storage. Make sure to hit http://www.sun.com/storage/san and follow the link for Storedge SAN 4.X and download the install_it script which will take care of completely upgrading your Sun FC drivers.
Good Luck!