Hello,
We are currently using Windows Server Backup to backup three Hyper-V guests running on a Windows 2008 R2 host. Two guests are running Server 2008 R2 and one is running Windows 7. I have the backups going to a dedicated external disk drive.
WSB backs up the two 2008 R2 Hyper-V guests just fine. However, when attempting to backup the Windows 7 Hyper-V guest, I receive the following error:
Error in backup of <Windows 7.vhd> during read: Error [0x80070001] Incorrect function.
I ran a "vssadmin list writers" and all the VSS writers showed "Stable" with no errors. I have plenty of space on the external drive as well. I've read this article: https://support.microsoft.com/kb/973455?wa=wsignin1.0#workaroundissue12 except that doesn't seem to be what I'm experiencing here.
Anyone have any suggestions?