Called apple care they said it could be the HD.O-Oh
Might be a failing hard disk, I would recommend you to keep a very recent backup for a while, better back up everyday.
Do you have a recent backup, if not do so before you go there, they might change the HDD and if they do you won't get the HDD back.Called apple care they said it could be the HD.
They had me do a reset where you unplug the power for 1 min and turn it back on.
I dont hear the noise now but still made an appt for the genius bar..