Upgrading Nikon D90 to Nikon D7100... worth it?

Just had my upgrade from D90 to D7100. I'm really quite skeptical and afraid of being disappointed about my dslr body upgrade instead of getting a new lens... well guess what... I'm glad I did!!!

As a user of D90 for almost 5yrs, so far here's what I think of a D7100 huge advantages for me:

Windows software raid1 / mirror drives negative testing

I never had an experienced on doing software raid1 or at least win8 mirroring drive but I decided to jump into negative testing right away. Just to prepare myself to any kind of situation I may experience when one of my drive died.

To be honest I'm really worried about the reliability of the HDD these days though I do understand the high storage and faster read/write means more issue probably.