root@OpenWrt:~# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                 3328      3328         0 100% /rom
tmpfs                    29192        60     29132   0% /tmp
tmpfs                    29192        44     29148   0% /tmp/root
tmpfs                      512         0       512   0% /dev
/dev/mtdblock7            1664       224      1440  13% /overlay
overlayfs:/overlay        1664       224      1440  13% /
root@OpenWrt:~#