booting a already installed vm with SLES10 / OES2 in citrix XENServer
works only in "Recovery Mode", so the vm will boot from cd/dvd, but in
full virtualized mode instead of para virt mode. The following install
will load/install then the full virt drivers, which will change the
installed vm back to full virt mode....

So we have to choose another install option, no server down method. Is
there an online update possible from OES2 to OES11? If not, what method
is best beside the web server update...?