My model b pi runs raspbian since half a year. The pi hosts an apache webserver, file server and other programs. A cron job is performing apt-get update / upgrade on a regular basic.
The latest upgrade (~monday) broke the pi. After restart, the green led flashes just once, indicating that no firmware was found (as written in several posts).
Is there a way to keep my files on the SD and to fix the firmware or boot section only?