Hey, not sure if anyone is still looking at this thread, I have an M5110 (basically the 9265-8i but with PCI3), based on the 2208 and initially it had JBOD support.
I flashed it to an IBM rom of 23.22, JBOD was still working fine, the flashed it to an LSI rom of 23.28, JBOD was still working...