Disk usage Shows incorrect disk

scottu

I mounted the docker root to a mounted disk that is much larger. The webui shows /dev/xvda1 while all data is located on /dev/xvdb is there a way to show the correct disk usage?

esackbauer

Yes, use a monitoring tool outside of mailcow 😉

accolon

The web UI shows the size of the disk the vmail-vol-1 Docker volume resides on by using df on the mounted volume inside the dovecot container.

Usually, Docker expects/manages volumes in /var/lib/docker, so this is the disk df gets the size for. Depending on the way you “mounted the docker root”, the size shown may not be the correct one, e.g. when using links.