Telos
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- NAS
- DS4l8play, DS202j, DS3623xs+, DSM 8.025847-𝘣𝘦𝘵𝘢
docker and VM will be affected yes considering they keep information on that created volume.
so yes it would essentially destroy most of it meaning it would be pretty much a rebuild.
You can backup your Docker containers from the WebUI (I don't use VMs so I'm of no help there).