title: Docker run error: "Thin Pool has free data blocks which is less than minimum required"
body: <p>We are trying to run a docker in a way that used to work, but now we get a "Thin Pool lack of space" error:</p>
  
  <pre><code>docker run --privileged -d --net=host --name=fat-redis -v /fat/deploy:/fat/deploy -v /fat/fat-redis/var/log:/var/log -v /home:/home fat-local.indy.xiolab.myserv.com/fat-redis:latest /fat/deploy/docker/fat-redis/fat_start_docker_inner.sh
  docker: Error response from daemon: devmapper: Thin Pool has 486 free data blocks which is less than minimum required 163840 free data blocks. Create more free space in thin pool or use dm.min_free_space option to change behavior.
  See 'docker run --help'.
  </code></pre>
  
  <p>What does this error mean?
  We tried 'docker rmi' and the advise from <a href="https://stackoverflow.com/questions/36918387/space-issue-on-docker-devmapper-and-centos7">here</a>, but all in vain.</p>
  
  <p>Any ideas?</p>
  
  <p>Thank you</p>