LVM: Logical Volume Manager

„The alternate install CD allows you to perform certain specialist installations of Ubuntu. It provides for the following situations:
* creating pre-configured OEM systems;
* setting up automated deployments;
* upgrading from older installations without network access;
* LVM and/or RAID partitioning;
* installs on systems with less than about 384MB of RAM (although note that low-memory systems may not be able to run a full desktop environment reasonably). „