Try going into the Console screen then enter CTRL ALT X then select default VG (option 2)to see if it is there. If it is not verify if the system is seeing the LSI by entering CTRL ALT H if you do not see it try reseating the RAID controller on the motherboard then reboot. If you are not able to see it in the Volume Manager try a "Rescan" and or go back to previous version from the Main. Software Update (I do not know what caused the degrade from the RAID so I have no idea as to why you are upgrading). If all does not work download logs so engineers can review the system for the LSI and or enable the Remote Support function in CRTL ALT X for the next business day.