Feb 17 21:50:52 VAULT emhttpd: shcmd (151): /usr/local/sbin/mount_image '/mnt/user/system/docker/docker.img' /var/lib/docker 25
# Share exists on disk1,4
You will get far far better performance by moving the docker.img to the cache drive
Set the Share settings for the system share to be Use Cache: Prefer
Fastest way to get it onto the cache drive:
Then Settings, Docker, Disable the service. Delete the docker.img file, then re-enable the service then Apps, Previous Apps and check everything off.
Slower way:
Settings, Docker, Disable the service, then Main, Array Operations and run Mover. Whenever its finished you can re-enable the docker service