We are 5 of us here in the team that use Clonezilla on the same LAN to deploy different computers.
The other day, It happened that when 2 of us wanted to create a Clonezilla session at the same time (through ncurses interface), the paramaters of the first session conflicted with the ones of the second session. So that an image was deployed on a computer that was about to be cloned. :-/ I guess that some variables of the second session were given to the first one.
Could you make "/opt/drbl/sbin/drbl-ocs" verify if it's not already running (building a session) and exit with information message if so ?
Hope I can help preventing loosing work.