After solving the install getting stuck at /sbin/loader (was indeed a DVD image issue) I have hit another wall. CUMP 8.5.2 wants a Hard Disk size of at least 315G - this is the final preinstall check, after installing the OS, network and the application bootstrap.
Unfortunately most ESX environments, ours included, have datastores provisioned with 1M block and this limits the maximum size of a virtual disk to 256Gb (which, let's be honest, would be plenty for a lab MP instance). Did not find a way to cheat it and I suspect thet the only way to fix it is at the source (lower the size constraint).
After the failed installs, I can boot from Knoppix, mount the partitions and this I see the check in /tmp/MeetingPlaceInstallLog.txt (below).
This is likely coming from a shell script but I cannot find it. I would go as far as unpacking the DVD image, patching the respective script and re-packing it afterwards - assuming that this is not in a self-extracting bin archive. I know that the "official" way is to mount a datastore without the 256Gb restriction - but this is out of the question in the given conditions. Any solution, any recommendation?