I have recently build 3 new domain controllers based on Windows 2008 to do some validation of our infrastructure upgrade and possible backup fallback scenarios.
Unfortunately I wasn't able to get a full backup with system state.
First I tried backing those servers with Windows 2012R2 based Data Protection Server.
For system state backup I kept getting "Replica Inconsistent"
After some troubleshooting it was recommended to try doing full backup on the actual server directly and see if that work and that fail before process starts with " A volume Shadow Copy Service Operation failed with error code 2155348129"
I can't seem to find anything in logs that would point out what particular component actually causing backup to fail.
All 3 machine are Hyper-V vm's .