I have a server with two data arrays:
B: 3.45TB NTFS
D: 6.71TB ReFS
On D: is a VHDX (Dynamic, 8TB max size) file that hosts volume E: (NTFS), which is the only drive letter seen by remote workers who log into the system and holds all production data. Production data is larger than 6.71TB, so inside E: there are three VHDs mounted from Drive B:, So E:\Folder 1 is hosted in B:\VHD\Folder 1.vhdx, E:\Folder 2 is hosted in B:\VHD\Folder 2.vhdx, etc.
My problem is that someone added data to E: last night and caused the VHD to grow to 6.68TB, leaving only 30MB free on volume D:. Now D:\VHD\E.vhdx won't mount, 0xC000007F write failure. Any ideas on how to get this volume/VHD to mount again?
Ideas I've tried:
- D: can't be deduplicated because it's ReFS.
- D: only held 12KB of other data (scripts), everything but the VHD has been removed from D:
- Attempting to compact the VHD via the Hyper-V GUI results in no error messages, no disk activity or processor activity.
- Attempting to compact via DiskPart has achieved 11% at the writing of this. Disk activity to D:\VHD\E.vhdx is shown in Resource Monitor, though it is all read (~140MB/s). The VHD now reports in use instead of the write error when you attempt to mount it.
Processor usage still remains around 2%.
I do also have a backup from Friday before the user added data to the disk. I wonder if this would be the quickest solution. Compacting the VHD seems like it will take a long time for uncertain results.