LinuxBSDos.com published a manual disk partitioning guide for Ubuntu 11.04

Advanced or manual disk partitioning is available for those that want to create a custom set of partitions for installing Ubuntu 11.04. For whatever reason or reasons you choose to use the advanced disk partitioning tool, this article gives a step by step guide, with detailed explanations, on how to do it.

  Manual disk partitioning guide for Ubuntu 11.04