I have the message "WARNING: Some system settings will not be preserved! The system has started from read-only medium." so i think the USB DOM is not used.
I've filled my vg00 with 6 volumes iSCSI of 500GB, waiting for initializing.
Ok, so now this shutdown is not related to the USB or CD of the DSS software. IT has to be some hardware issue....... what about checking the RAM or CPU or if you can test with another system?