I'm having the same problems and 4.4.0-77 does not fix the problem. I also tested 4.8.0-51 and 4.10.0-20 and they also does not fix the problem.
What I've noticed occurring during the VSS Freeze/Thaw events is that the VM detects extra disks (see attachment) (which seem to be them same as the originals) i.e. sda is redetected as sdd, sdb is redetected as sde, and sdc is redetected as sdf. Not all disks are always redetected. This problem has never occurred, for me, on a VM with only one disk. My VM that fails has 3 disks. My VMs do not have a SCSI DVD drive. I've tried GEN1 and GEN2 VMs and both have the same problem. I've tested with the 2nd and 3rd hard drives both being small (50GB) and both being large (2856G) - both have same problems. I can induce the bug by creating (VSS) shadow copies by running 'diskshadow' with the following input on the hyper-v host: set verbose on set context volatile add volume C:\ClusterStorage\disk1 add volume C:\ClusterStorage\disk2 add volume C:\ClusterStorage\disk3 begin backup create end backup ** Attachment added: "Redetected disks kernel messages" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1679898/+attachment/4877435/+files/kernelmessages.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1679898 Title: [Hyper-V] Ubuntu VM crash during Hyper-V backup or live migration after installing kernel 4.4.0-72 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1679898/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
