{"action":"opened","issue":{"url":"https://api.github.com/repos/docker/docker/issues/10021","labels_url":"https://api.github.com/repos/docker/docker/issues/10021/labels{/name}","comments_url":"https://api.github.com/repos/docker/docker/issues/10021/comments","events_url":"https://api.github.com/repos/docker/docker/issues/10021/events","html_url":"https://github.com/docker/docker/issues/10021","id":53952401,"number":10021,"title":"Docker image eating up my disk space that is not used by docker","user":{"login":"ming-relax","id":7576663,"avatar_url":"https://avatars.githubusercontent.com/u/7576663?v=3","gravatar_id":"","url":"https://api.github.com/users/ming-relax","html_url":"https://github.com/ming-relax","followers_url":"https://api.github.com/users/ming-relax/followers","following_url":"https://api.github.com/users/ming-relax/following{/other_user}","gists_url":"https://api.github.com/users/ming-relax/gists{/gist_id}","starred_url":"https://api.github.com/users/ming-relax/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ming-relax/subscriptions","organizations_url":"https://api.github.com/users/ming-relax/orgs","repos_url":"https://api.github.com/users/ming-relax/repos","events_url":"https://api.github.com/users/ming-relax/events{/privacy}","received_events_url":"https://api.github.com/users/ming-relax/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-01-10T09:21:31Z","updated_at":"2015-01-10T09:21:31Z","closed_at":null,"body":"I have setup docker and I have used  completely different block device to store docker's system data:\r\n\r\n    [root@blink1 /]# cat /etc/sysconfig/docker\r\n    # /etc/sysconfig/docker\r\n    \r\n    other_args=\"-H tcp://0.0.0.0:9367 -H unix:///var/run/docker.sock -g /disk1/docker\"\r\n\r\nNote that **`/disk/1`** is using a completely different hard drive **`/dev/xvdi`**\r\n\r\n    Filesystem      Size  Used Avail Use% Mounted on\r\n    /dev/xvda1      7.8G  5.1G  2.6G  67% /\r\n    devtmpfs        1.9G  108K  1.9G   1% /dev\r\n    tmpfs           1.9G     0  1.9G   0% /dev/shm\r\n    /dev/xvdi        20G  5.3G   15G  27% /disk1\r\n    /dev/dm-1       9.8G  1.7G  7.6G  18% /disk1/docker/devicemapper/mnt/bb6c540bae25aaf01aedf56ff61ffed8c6ae41aa9bd06122d440c6053e3486bf\r\n    /dev/dm-2       9.8G  1.7G  7.7G  18% /disk1/docker/devicemapper/mnt/c85f756c59a5e1d260c3cdb473f3f4d9e55ac568967abe190eeaf9c4087afeac\r\n\r\nThe problem is that when I continue download docker images and run docker containers, it seems that the other hard drive **`/dev/xvda1`** is also used up.\r\n\r\nI can verify this problem by remove some docker images. After I removed some docker images, **`/dev/xvda1`** has some more extra space now.\r\n\r\nAm I missing something?\r\n\r\nMy docker version:\r\n\r\n    [root@blink1 /]# docker info\r\n    Containers: 2\r\n    Images: 42\r\n    Storage Driver: devicemapper\r\n     Pool Name: docker-202:1-275421-pool\r\n     Pool Blocksize: 64 Kb\r\n     Data file: /disk1/docker/devicemapper/devicemapper/data\r\n     Metadata file: /disk1/docker/devicemapper/devicemapper/metadata\r\n     Data Space Used: 3054.4 Mb\r\n     Data Space Total: 102400.0 Mb\r\n     Metadata Space Used: 4.7 Mb\r\n     Metadata Space Total: 2048.0 Mb\r\n    Execution Driver: native-0.2\r\n    Kernel Version: 3.14.20-20.44.amzn1.x86_64\r\n    Operating System: Amazon Linux AMI 2014.09\r\n"}}