Hello, I would like to hear your opinions on my plan for my MacBook Pro regarding Hard Drives. Primary: 240GB SanDisk Extreme SSD Secondary: 250GB HDD So I'll fit a second drive into a bay where the current DVD drive it. The second drive will be a clone of the SSD, for the event of a failure. Anyone who's got the cloning idea in operation atm able to tell me the ups/downs to it? Especially with it being SSD & HDD! Thank You!