Document URL: https://docs.openshift.com/container-platform/3.11/install/host_preparation.html#configuring-docker-storage
Section Number and Name: Configuring Docker Storage
Describe the issue: documentation does not add a note to warn regarding known issues regarding utilizing devicemapper as using devicemapper gets error:
"Error starting daemon: error initializing graphdriver: devmapper: Unable to take ownership of thin-pool (docker--vg-docker--pool) that already has used data blocks' error"
Suggestions for improvement: Add a section for known issues with the types
devicemapper has problems initializing graphdriver as it is unable to take ownership of thin-pool
Add a recommendation to use overlay2 by default.