Let me take a moment to thank you for posting on the HP Support Forums.
I came across your post and understand that you get a message on your laptop about the hard drive. It says 1720-SMART Hard Drive detects imminent failure. I'd like to assist you with this case.
I would like to know if any changes (hardware or software) took place on the laptop after which this issue may have started. Meanwhile, I did some research and found that the hard drive has either failed or about to fail in your computer.
I suggest you to review the steps performed in this link which will help to try and take a backup and run the hard drive test: http://hp.care/2iyWhs4. Hope this information helps. Feel free to let me know the results. All the best! 🙂