@Indianacarnie, checking the disk is the first thing to do, yes. The HDD's are under the front right (or one of them is), and it can either be failing, or the HDD bracket has vibrated loose, and since all HDD's vibrate while in operation, the bracket could no longer be isolating the vibration of the HDD from the chassis of the notebook.
@playful, welcome to the forums!!
🙂 Try checking the HDD brackets, they are easy to get to. Just flip the notebook over - while it's powered off and battery removed! - and make sure that all the screws are tight.