Have a look at /proc/mounts - it should tell you what is mounted where. The
size of the ramfs is a bit obscure - in fact I find the whole ramfs to be a
bit dodgy in that is not compatible with du, mount (except the procps one)
or df. If I recall correctly only /dev, /var and /tmp are ramfs, the rest is
rootfs (flash root bank) or hard drives (under /share/hdd and /share/flash).
The dns and ip is stored in a different flash bank than the kernel or
, so it doesn't
have to be erased on flash.