Peter Martin wrote:

> tmpfs on / type tmpfs (rw)
> /dev/cdroms/cdrom0 on /mnt/cdrom type iso9660 (ro)
> proc on /proc type proc (rw,nodiratime)
> sysfs on /sys type sysfs (rw)
> udev on /dev type tmpfs (rw,nosuid)
> devpts on /dev/pts type devpts (rw)
> cachedir on /mnt/livecd/lib64/splash/cache type tmpfs (rw)
> tmpfs on /lib/firmware type tmpfs (rw)
> tmpfs on /usr/portage type tmpfs (rw)
> tmpfs on /proc/bus/usr type tmpfs (rw)
>
> does this yeald any clues?

You dont seem to have any harddrives mounted. They normally have names
like /dev/hda# or /dev/sda#.

You need to mount your root partition with the command:
> mount /dev/hda3 /mnt/gentoo

After that, try 'df -h' again and you should find an entry for
'/dev/hda3', showing the 10G you assingned to the partition, and a usage
of 0%.