MacBook Pro9,1 15" 2012 About 3 months ago I installed a Samsung SSD 840 PRO 256gb in my main bay and moved my Apple HDD 750gb to the optical bay. It worked great for 3 months until last week, it started this loud clicky popping noise. The computer still seems to be performing ok, it is just very loud. Also it doesn't matter what I am doing i.e. video v.s. email it's there either way. In system info under the Apple HDD it says S.M.A.R.T. status: Failing This computer is barely over a year old and I find it hard to believe that the drive would be going, Another forum suggested that the optical bay may not be set up for 6GB/s because the dvd player operates at maybe 3GB/s or something like that. I can see the logic in this possibility but there must be a workaround for this. Question 1: Is there a script solution or some other work around to keep the HDD or a replacement HDD in place? Question 2: Assuming the HDD is still good. Should I swap the drives, SSD in the optical bay and the HDD in the main bay? What would be the drawbacks?