What is this noise when I bootup my MBP and how do I stop it?

poiihy

macrumors 68020
Aug 22, 2014
2,285
53
That's the disk drive checking if there is a disk in it. All macs with a superdrive make that sound when they boot. The only way to stop it is to unplug or remove it.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.