I recently read about a company which setup all of their linux webservers to run without hard drives. This sounded really exciting to me because that would essentially mean that the biggest point of failure (HDD) is now gone. Furtheremore, when updating the OS (or anything else) for 5 or 10 web servers would be as easy as simply editing one image.
The million dollar question is, how is this done? what is needed to make this work properly and what are the PROS/CONS? It's a great sounding idea, I just hope I am not missing some really big issues.