a df -h before and after the removal of a snapshot shows no change?
32 bit Ubuntu mean-stack.

Filesystem Size Used Avail Use% Mounted on
/dev/vda1 20G 3.1G 16G 17% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 235M 4.0K 235M 1% /dev
tmpfs 50M 316K 49M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 246M 0 246M 0% /run/shm
none 100M 0 100M 0% /run/user

Are shapshots stored outside my disk space?