Originally Posted by porkupan
This dump would give you more than just rootfs, itwould give you all the private user info as well. Not a good idea to spread those around. The security certificates are kept in /var. You may want to ask people for a copy of the /dev/mmcblk0p1:
dd if=/dev/mmcblk0p1 of=/mnt/us/rootfsbackup.bin bs=1024
It is going to end up being a rather huge file though. Won't pass through any email systems.
Oops, didn't think about certs, just books in /mnt/us. Changing my post.