maybe somebody here has the ability to connect the developer ...

It seems to be a good idea to use the option 'mount by volume label' in
the FiLR appliance. Actually it is done via 'mount by device'. During
the migration maybe the devices change there order. E.g. during the
migration /dev/sdc1 is mounted to /filr_appliance. And /dev/sdd1 ich
mounted to /vastorage. When you remove the temporary drive sdd becomes
sdc and the vastorage wil not be mount. Then you can not connect to
FiLR or the admin page.

You have to change manually the mounts in /etc/fstab and reboot.

Novell can protect the migration when mount by label in used insteed.