Under Repair

I know I have mentioned before about our horrible luck with electronics.  Well, the electronics demon has struck again.  My less-than-two-years old Mac mini is in the repair shop bc the hard drive is failing.  Great!  Can someone explain to me how the hard drive starts to fail?  Especially on something so new?  Anyway, that is why I haven't been able to upload any pictures or do any posts.  Praying they can save it and fix it.  Hopefully soon.