The synchronisation process failed during stage 2: Error 0xfffffff8

When I mount the root partition as r/w with the rw command and
make the following symbolic link:

When I do the following commands, I can reproduce this:

rw
ln -s /proc/mounts /etc/mtab
ro
logout

Emplode->Sync

Error!

Why I did this is because it makes the df command work. Ex:

before
empeg:/bin# df
df: cannot read table of mounted filesystems: No such file or directory

after
empeg:/bin# df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 15863 6976 8887 44% /
/dev/hda4 17463360 10801739 6661621 62% /drive0