Thanks for your help! I'm using Debian Lenny as Fai-Server now. The standard FAI - Installation installs version 3.2.17, which supports LVM. I managed to install Ubuntu Hardy from Debian Lenny with FAI. There are some problems with GRUB, but there is a workaround in the FAI-Wiki, which works for me. It is also necessary to write a custom "prepareapt" - Hook in order to copy the right "sources.list" to the Install-Client and to prevent the default prepareapt - Task from executing.
Garb
