Yesterday I installed an SSD in my MacBook and kept my original HDD with a "data doubler" (replaces the DVD-drive with a hard-drive bay). That means I have my OS (and applications) on both my SSD and HDD. Is it possible to get rid of the OS on the HDD? I think that removing everything but the ~/users-folder from the HDD should solve this problem, right? If not, what is the best solution to achieve this?