Server 2012 is set up with a single Hyper v machine. VHDX machine Hard Drive is located on the C: drive. Backup is set to location on the F: drive.
I started receiving errors from the server backup. And it is not possible to make a full backup without error on the reading of hyper v. I can make full backup incl. hyper-v machine if I shut it down.
It has until one week ago worked fine.
Writer Failures
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
Instance Id: {B74F43F9-1585-44AE-88CD-639B042BDB6B}
Writer Name: Microsoft Hyper-V VSS Writer
Writer State: 5
Failure Result: 80042336
Application Result: 80004005
Application Message: (null)
Component: C7A57D4E-03CD-4536-9C8E-AA181F26DF11
Logical Path: (null)
Component Result: 800423F3
Component Message: The number of volumes reverted does not match the number of volumes in the snapshot set for virtual machine 'GEOSRV_EVENTCONTROL' (Virtual machine ID C7A57D4E-03CD-4536-9C8E-AA181F26DF11).
File Spec: C:\ProgramData\Microsoft\Windows\Hyper-V\Virtual Machines\\C7A57D4E-03CD-4536-9C8E-AA181F26DF11.xml Recursive: 0
File Spec: C:\Users\Public\Documents\Hyper-V\Virtual hard disks\\GEOSRV_UDSTILLING.vhdx Recursive: 0
*-----------------------------*
Application backup
Writer Id: {66841CD4-6DED-4F4B-8F17-FD23F8DDC3DE}
Component: C7A57D4E-03CD-4536-9C8E-AA181F26DF11
Caption : Backup Using Child Partition Snapshot\GEOSRV_EVENTCONTROL
Logical Path:
Error : 80780175
Error Message : Component was skipped from volume shadow copy.
Detailed Error : 800423F3
Detailed Error Message : The writer experienced a transient error. If the backup process is retried,
the error may not reoccur.