I'm getting an email with this every night from the docker image.
Storage volumes are mounted under /storage and /cf.
I've looked in the source, it seems to be message 'storageDiskMounted' from ./Core/Workers/Libs/WorkerPrepareAdvice/CheckStorage.php
It seems ./Core/System/Storage.php expects storage in /storage/usbdisk1 when its in docker, but i'm not sure?
What can be the problem?