Thanks for this forum!
Just upgraded my HP DL580 G5 to LSI 9260-8i and HP SAS 3Gbs Expander which came with 2.06 firmware.
After following all the instructions for upgrading the LSI 9260-8i to 12.15.0-0248 and HP SAS Expander to 2.10,
I was able to dual link the 9260-8i to the HP SAS Expander...