Are there anyone else seeing issues with Windows Server Backup on Hyper-V Server 2016 after installing KB5001347? We can reliable reproduce failing backups at stage "system state".
After uninstalling KB5001347 backups run as expected again. After re-installing KB5001347 backups stop working again.
The error message(s) in backup management console is/are:
- The mounted backup volume is inaccessible. Please retry the operation.
- The operation ended before completion.
The following error(s) is/are logged in event viewer:
- 517, Backup: The backup operation that started at 'UTCTIMESTAMP' has failed with following error code '0x8078004F' (The mounted backup volume is inaccessible. Please retry the operation.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.
- 10170, HYPER-V-VMMS: Requester reported unsuccessful backup for the virtual machine 'MACHINENAME'. (Virtual machine ID GUID).
Thank you in advance!