I've started having issues with WSB on a Windows Server 2012 R2 virtual DC. I had been using WSB full server backups to local disk without issue for probably 8 months or more. Recently I noticed that the CPU utilization on the server was stuck around 100%, and it was the Virtual Disk service (vds.exe) using all the CPU.
During troubleshooting I found through VSSAdmin that I had more than one writer in the "Waiting for completion" state. After some searching I found a suggestion to restart the Cryptographic Services service and that seemed to work. CPU utilization and server performance went back to normal. I hoped that'd be the end of it—it wasn't. The issue returned the next day, and this time restarting the cryptographic service did nothing. I tried restarting the Block Level Backup Engine service because it was stuck running and that also did nothing. I also tried not backing-up the System State, and that didn't help. I've had to restart the server each morning to resolve the issue, so I have stopped the backups until I find a solution. Has anyone else experienced this behavior?
Thanks!