
Image by DigaoSPBR
My internal hard disk would continuously spin on my MacBook Pro and never goes to sleep. I replaced my internal drive on my MacBook Pro with an SSD disk, which made a massive difference in speed. At the same time, I removed the DVD unit and installed a new 500gb drive instead. The extra disk went to sleep when not in use, but then started within a couple of minutes or less. Here’s what I did to fix that problem.