Hyperv Server Not Backing Up Error

[dbeato]

We had a server that had problems backing up, the errors only showed the following:

The backup operation stopped before completing.
Detailed error: ERROR - A Volume Shadow Copy Service operation error has 
occurred: (0x80042336)
The writer experienced a partial failure. Check the component level error state for more information.


A Volume Shadow Copy Service operation failed. Please check "VSS" and "SPP" application event logs for more information.
ERROR - A Volume Shadow Copy Service operation error has 
occurred: (0x80042336)
The writer experienced a partial failure. Check the component level error state for more information.

Consultants had tried to fixed this error as the VSS Writer for Hyperv was showing an error.

To fix that error I reviewed the Virtual Machines and found out one Virtual Machine running Server 2008 R2 running out of space due to the issue outlined below and causing the VSS Copy to fail.
https://www.computerworld.com/article/3112358/microsoft-windows/windows-7-log-file-compression-bug-can-fill-up-your-hard-drive.html

Once I cleaned up the Drives and space was all back to normal, restart the Hyperv VMMS Service.

Then the backups started working properly.