Setup:
Windows server 2012R2 on host. only has Hyper-V and windows backup services running.
6x Hyper-V virtual machines running windows server 2012R2
All software up to date with windows updates.
Host is a HP Blade 460 G9, no HD os is on a HP SD flash (this is the recommended config) guests are on a HP Storage Blade D2220 8x300gb sas raid 10. backup is to an external usb drive connected to the host blade. have also tried running a back to a shared folder on the storage blade. Im just trying to backup the guest hyper-v's
Have been unable to run a windows server backup since day one of install, same error constantly, see below.
Host:
Event ID 8299 VSS
A VSS writer has rejected an event with error 0x800423f4, the writer experienced a non-transient error if the backup process is retried, the error is likely to reoccur.
Event ID 10172 Hyper-V
Vss Writers inside virtual machine ... failed to perform BackupComplete to it shadow copy (VSS snapshot) set: Catastrophic failure (0x80000FFFF).
Guest: No errors that I can find in event logs
Running VSSadmin list writers doesn't display any writers in a error state.
the backup fails almost immediately with no effort to backup data.
only information I can find online is in relation to the integration services being up to date, which they are.
***Please do not suggest using other software for backing up, I want to use the integrated windows server backup - I have my reasons. There is NO reason why this solution should not work as is out the box