should i be able to hear my harddrive reading and writing?
Yes, unless it's making more, non regular sounds that aren't consistent, then you should be worried. I can hear my hard drive pretty clearly since the fans are pretty weak/not working/idk. It used to make stranger noises, but it's been fine for a long while now, however windows still thinks that it's bound to fail at any moment (it's been thinking that for over a year, so I doubt it has a major issue already).