Thanks gunrunnerjohn.
James,
I've updated the firmware back to 1.08 and did a factory reset (held the reset button down for 15 seconds). When I log into the admin console I'm still able to see the Hardware configuration screen, which again asks me how I'd like to configure my hard drives. Raid settings are still the same, raid 1, no remaining sync time left. I'm want to try removing the newly inserted hard drive, then re-inserting it with 'Auto Rebuild' enabled, any thoughts on if that might help or if it might have a negative impact ?
Thanks,
Jimmy