VM Explorer User Discussions

HyperV Backups

sactobob Absent Member.
Absent Member.

HyperV Backups

I've been backing up my VMware VMs fine, and finally started my first backups on my HyperV servers (Needed more disk space) However, I noticed when I start a backup of a HyperV VM, there's a brief period where it appears the VM is suspended and restarted? The uptime on HyperV manager for the VM  is also reset to 00:00:00. Is the VM actually going offline and unavailable? This is of course important to know and very critical (If it is indeed going offline), as I don't see that same thing happening with my ESXI VMs. Those continue run with a real-time snapshot made. I have VSS turned on for the backup as well.


Micro Focus Expert
Micro Focus Expert

Re: HyperV Backups


the fact that Hyper-V manager shows a reset of the uptime after a VSS snapshot is caused by the design of Hyper-V.
Reference: https://social.technet.microsoft.com/Forums/windows/en-US/15437e6f-7406-4a8c-ae68-6695d15e8456/hyperv-virtual-machine-uptime-reset-to-zero-after-recovery-point-taken?forum=winserverhyperv

During the VSS snapshot, the VM will continue to work, but not be able to provide it´s full performance to the users.
Reference: https://technet.microsoft.com/en-us/library/dn818483(v=ws.11).aspx

I do not expect that a VM totally goes offline during a VSS snapshot or is even rebooted.
Please check the OS uptime after backup using the following method:


Please let us know in case more info is needed.


Kind regards,