While the technology might be available there is also something called as economic cost. A lot of what we have today is because we are building something on top of something.
If everything were to go away starting from scratch is not going to be very economically viable.
Add to this the external woes. Loss of electronic life means, several millions will loose jobs and will have to fall back on manual work. The population of the planet has increased substantially. Food, medical and other needs have increased. Much of that scalability depends on electronic means to controlling stuff.
Disruption on a massive level only means extreme chaos.
But we have all the blueprints and know how - we don't have to build everything from scratch (most of the time is spent on R&D, building the stuff is actually the easy part). Organize the military and the civilians to start rebuilding everything and we're back on track in several months for sure (except for the satellites, maybe)...
Firstly a lot of information today is on hard drives.
We are talking of a massive solar flare. Electronic equipment down, hard disks fried, access to energy limited, communication equipment down. Information in books is safe, but how much of modern information today is in printed books?
If you look at the whole equation. There are going to chained failures of systems. Each depending on other to recover. While none can at the moment.
Hard drives sit in their own Faraday Cage. http://en.wikipedia.org/wiki/Faraday_cage. So they are a lot more protected than you might think. Induction in long power cables is a problem, but things have to get ridiculous before surge protectors become useless.
If everything were to go away starting from scratch is not going to be very economically viable.
Add to this the external woes. Loss of electronic life means, several millions will loose jobs and will have to fall back on manual work. The population of the planet has increased substantially. Food, medical and other needs have increased. Much of that scalability depends on electronic means to controlling stuff.
Disruption on a massive level only means extreme chaos.