docker:Error running DeviceCreate (createSnapDevice) dm_task_run failed

1) service docker stop
2) thin_check /home/docker/devicemapper/devicemapper/metadata
3) thin_check --clear-needs-check-flag /home/docker/devicemapper/devicemapper/metadata #不一定需要这一步
4) service docker start
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原文地址：https://www.cnblogs.com/garfieldcgf/p/8323987.html