I'm using Docker Desktop 4.49.0 on Windows 11 Pro, and I've generally been able to access the volumes through \wsl$ to back them up. But after encountering an issue with one of my containers, I have a volume backup I want to restore, but I can't seem to copy it into the Docker volume anymore. Every time I attempt it, I get a message saying there's not enough space, despite having plenty of disk space available. This is frustrating because I need to copy about 800 MB of data, yet it keeps insisting I need 737 MB of extra space. What's going on? How can I transfer this data back into the volume?
1 Answer
Instead of directly modifying the volume paths, try using the `docker cp` command. This lets you copy files from a host path straight into a container path that maps to your volume. Here's the documentation for more info: https://docs.docker.com/reference/cli/docker/container/cp/
That actually worked! But I’m running into another issue now. I copied the files into a PostgreSQL volume and when I try to export the DB with `docker exec pg_dump`, it only generates a really small file instead of the expected size. I didn't have an export beforehand, so I'm worried that the data isn't being used properly.