device: 0.827
graphic: 0.501
debug: 0.437
semantic: 0.257
boot: 0.141
performance: 0.139
PID: 0.066
vnc: 0.058
other: 0.048
files: 0.020
KVM: 0.013
network: 0.010
socket: 0.004
permissions: 0.004

MBR/Partition table corruption/loss , probably related to virtual sata disks and backup