I just accidently uninstalled my Gt 750m driver and then reinstalled it again. On the next day i started up my laptop and noticed that my ultrabay is not working anymore. I tried using Lenovo Energy Management with a feature called "Dust Removal" which will blow a dust using both fans, but the ultrabay fan wasn't working at all.
Lenovo y510p ultrabay graphic not showing in device manager?
Guest
Actually You have not downloaded drivers of this, first you should download then you can see it.
Solution