In my last post I showed you how to create a consistent backup of a Hyper-V host using the no additional cost Diskshadow command and an attached USB drive (in contrast to the costly VMware Consolidated Backup). Now I want to show you how to restore the VMs that you backed up to a separate host (what good is a backup of you can’t restore it!).
To recover the data, we’ll simply reverse the process on another Hyper-V host. I attached the USB disk used for backup to a different system, and invoked the diskshadow script below using the command diskshadow –s HyperVrestore.txt. HyperVrestore.txt looks like this:
set context persistent
#the backup.cab file mentioned below is the one created during backup.
load metadata G:\Hypervbackup\backup.cab
set verbose on
It’s similar the HyperVBackup.txt script, except that it reads the metadata from backup.cab and uses Xcopy (in HypervRestore.cmd) to copy the files from the USB drive (G:) to the local system:
Xcopy g:\HyperVBackup\VMs\*.* C:\VMs\*.* /e /s /y /F /O /X /R /H
The command window looks pretty similar to the one I showed you in the backup posting.
The net effect of the restore is the important part.
On the source system, I had two running VMs (an instance of Hannah Montana Linux and a Windows Server 2003 VM):
Before I ran the diskshadow restore, Hyper-V manager on the "recovery” system only showed three VMs:
Once the restore process completed, the recover host showed all 5 VMs!
Let me know if you would like me to go into more complex recovery scenarios (like different drive letters or changed drive letters / directories).
In my next post, I’ll show you some of the detailed wicked coolness of backing up non-Windows VMs using the Hannah Montana Linux instance noted above.