Sounds like you just put the "partial" directory into the wrong parent directory. I'm fairly sure that I never had "debian-apt-get-archvies", but if that's the directory name you used, then you need to put the "partial" directory into that directory instead... Code: mkdir -p /media/mmc1/debian-apt-get-archives/partial Here's the updated original post for anyone who wants to do this.
mkdir -p /media/mmc1/debian-apt-get-archives/partial
#mount -o bind /media/mmc1/debian-apt-get-archives /debian/var/cache mount: mount point /debian/var/cache does not exist