I've installed it from the DVD.
And when i run /usr/pluto/bin/Di...., it results in an error after a while:
brononius: Is diskless_createtbz.sh finishing or stopping at this error?
This error will not prevent MD creation afaik. This is an error at the time of creation of the mythtv_player within the diskless image chroot creation process. The diskless image in the chroot is trying to contact the mysql server on the dcerouter, it cannot resolve the address. afaik this is normal behaviour during the image creation, at least that is what is has been doing for me and I have no issues. Again, this indicated error should not prevent the MD creation at all. I've added raspbian image generation to this script and I have tested it *many* times here for ubuntu i386 diskless image creation and I have had no issues.
If you add an MD manually it will not have it's /usr/pluto/diskless/XX directory structure created for you automatically. You can manually cause it to be created by selecting the MD in the webadmin and choosing "Rebuild Image". But this should not be necessary, the system should be detecting it automatically.
Side note to L3, diskless_createtbz.sh already creates it's own log file of it's activity and displays the name of the log file when the script starts. log_file=/var/log/pluto/Diskless_MD_Creation_$(date +%Y%m%d_%H%M%S).log