OS is Windows Server 2012
I have a VHDX file that we've been using for backups since Windows won't play nice with our NAS. The first 6 backups worked flawlessly, and they show up in the Windows server backup control panel.
However, subsequent backups have failed with the error: "disk not available." Sure enough, I can't mount the VHD anymore, with the error, "permission denied." The permissions on the file are set fine, I should have full control, and so should the backup operators.
So I thought maybe the VHD is full and it's giving me an error because of that. But when I try to resize the VHD, it says the file is in use by another process. I used process explorer to check for open file handles and saw that SYSTEM (PID 4) had two handles on the file. I then rebooted and tried again, same issue. I also stopped the hyper v service and tried, to no avail. Windows complains that the file is open in another process, although this time, process explorer shows no open file handles to the VHD.
I'm a bit stumped here. What could be going on? Anyone else use a VHD for backup or have another revomendation for backing up over a NAS? We're using Windows server backup and doing a full server backup. About 6TB of data.
Thanks!