ganeti2015 doesn't come up after a reboot, on the serial console I can see the following, can you please have a look?
UEFI0147: The system hardware or cabling configuration is invalid. Do the following: 1) Make sure the system cables, risers, and CPU configuration are installed correctly. 2) Reseat each PCIe riser and reconnect the cables. For more information, see the system Installation and Service Manual.